Transmission
car to be driven on the road must make wheels turn, how the power of the engine to the wheels and the wheels turning? Responsible for transmission of power to get the car to play with the device functions is the drivetrain, the car without it becomes a generator and burn the machine.
After it is included in the base charge of the power transmission system in the connection means, the power transmission mechanism to change size, to overcome the different rotational speed differential between the wheels, and means coupling each shaft, with four main device able to transmit engine power to the wheels.
A power connection apparatus
1. Clutch: This mechanism is set between the engine means and the manual transmission, is responsible for transmitting the power of the engine gearbox hand.
2. The torque converter: This mechanism is set between the engine and gearbox from, the engine power can be smoothly transmitted to the device from the gearbox. Comprising a set of clutch torque converter, to increase the transmission efficiency.
Second, the transmission mechanism
1. manual transmission mechanism: commonly known as "manual transmission." In manually operated gear shift.
2. The automatic transmission mechanism: commonly known as "TRANSMISSIONS." By the hydraulic actuator to change the gear position.
Third, the differential
when the vehicle is turning, the wheels left and right sides will produce two different speeds, the drive shaft so the left and right sides will have two different speeds, then solved using the differential left and right two sides speed different problems.
Fourth, the drive shaft
will pass out through the power transmission system, thereby generating means is transmitted to the wheel drive force path.
Clutch means connecting the power ─
Gasoline engine powered vehicle is running, the engine continues to run. But in order to meet the demand of cars, vehicles must stop, shift and other needs, it is necessary to move them outside even at the engine, joined a group of organizations, depending on demand in order to interrupt transmission of power to the engine in case of continuous operation under reached so that the vehicle is stationary or be required Rong shift. This group of institutions, is the power of the splicing device.
Power connection device ─ clutch
clutch mechanism which is set in the device between the engine and the manual transmission is responsible for transferring the power of the engine gearbox hand. The output shaft of the engine flywheel mechanism secured together, flywheel in the housing, with a disc-shaped spring contact pressure plate, a friction plate therebetween with the gearbox input shaft.
When the clutch pedal is released, the flywheel using the pressure plate spring force, the friction plate pressed firmly, so that in between the interlocking without slip phenomenon and achieve the object of connection, the power of the engine can pass through this institutions, transfer to the gearbox, complete the powertrain work.
And when the pedal is depressed, the spring loaded mechanism will be, so that the periphery of the tilt spring, the skin will press the friction plate disengaged. At this time, the friction between the plate and the flywheel are not linked, even if the engine continues to run, the power is still not transmitted to the gearbox and the wheel, this time, the driver can perform a shift operation and stop the like, so that the engine will not stall .
Power connection device ─ torque converter
when the auto industry continues to develop, consumers began to feel tired for controlling complex three modes of operation of the accelerator pedal, brake and clutch. Mechanical engineers began thinking about how to take advantage of agencies to simplify the use of the process. Torque converter is to be imported automotive products under such circumstances, the achievements of a new experience.
Torque converter to replace the traditional mechanical clutch between the engine and is TRANSMISSIONS, capable of smooth transmission power of the engine means to TRANSMISSIONS.
From between the torque converter and clutch as different embodiment, in the torque converter, the left engine power output shaft directly connected with the pump wheel shell. In the left side of the torque converter, there is a set of turbine, connected to the transmission system on the right side of the transmission shaft. No direct connection between the guide mechanism and the turbine wheel, both sealed in the housing of the torque converter, and the torque converter is filled with the viscous liquid.
When the engine is at low speed, the torque converter will be the same throughout the low speed, the pump vane wheel will drive the viscous fluid in the torque converter, so that the flow of circulation. However, since the speed is too low, the turbine of the fluid urging the strength is not sufficient to propel the vehicle, the vehicle can stand still, as the clutch can achieve isolation.
When the accelerator pedal, the engine speed increase, the rotation speed of the impeller will simultaneously enhance, liquid flow rate continues to increase in the torque converter, the turbine continues to increase for urging, when it exceeds drag operation, the vehicle can move forward, the power It can be transmitted to the transmission system and the wheel, to achieve the purpose of power transmission.
Transmission system
car needs a relatively large acceleration at the start of the driving force, the vehicle speed is low at this time, but it must be at a higher engine speed to output larger power. When speeds up, the car driving dynamics need gradually reduced at the end, as long as this time to lower the engine speed to reduce the power output, can provide sufficient power car. The speed of the car in the process from low to high, the engine speed is changed from high to low, to how to solve the paradox of it? So this is known as "transmission" may change means the difference between the engine revolution and the transducer is born for the wheels.
Transmission is due on demand operations have "manual gearbox" and "automatic transmission" two kinds of systems, the way these two do move the gearbox is not the same. In recent years, due to advances in technology and consumer demand, the development of automobile plant called "automated manual gearbox" of the automatic transmission can be manually operated; in addition to high-performance automobile plant also developed a vehicle called "automated manual transmission "automatic operation with the manual gearbox. The current F1 racing full use of "automated manual gearbox," so using this type of manual transmission vehicles are advertised using technology from F1.
Manual transmission system
In the manual transmission clutch which contains, manual transmission two main parts.
Clutch: the engine is transmitted to the power transmission mechanism to transmit power using a friction friction sheet. Clutch models typically use only two of the friction plates, and the car load vehicle using a clutch friction plate more. CLUTCH also two kinds of wet and dry, wet clutch hardly be used in the current car above.
Manual gearbox: do manually operated transmission gear converting operation, the gear input shaft and the output shaft of the manual transmission meshes. A plurality of sets with different numbers of teeth of the gear after the meshing, can produce various ratios deceleration. The current manual transmission are synchronized using gears engaging mechanism, so that a more simple operation of the shift, the shift smoothness is also better.
Self-scheduling transmission system
in order to make operation of the vehicle becomes simple, and let not good at operating manual gearbox the driver can easily drive a car, so a way to manufacture automatic gearbox changing gear has become an important work, so engineers developed the world's first car with automatic transmission in 1940. Since then driving a car at the start, stop, and acceleration and deceleration during traveling, the driver will not need to do the shifting operation.
A modern automatic transmission fluid torque converter which comprises three main parts automatic gearbox, electronic control system. Join manual shift control program in the electronic control system inside, it becomes a manual operation function "automated manual gearbox."
Torque converter liquid: between active and passive impeller wheel using hydraulic oil as medium to transmit power. The power transmission from the input shaft to the output shaft, the transmission output shaft to the automatic transmission via power again.
Because hydraulic oil is flowing between the active and the passive impeller wheel will consume most of the power. In order to reduce the loss of power, between the active and the passive wheel was added to make a set of rotor vanes without increasing the efficiency of energy transfer; and adding a set of clutch in the torque converter fluid, and utilizing appropriate driving state of the clutch with the active passive wheel lock, so that between the active and passive wheel speed differences are no longer, thereby increasing the efficiency of power transmission.
Automatic transmission: the planetary gear set constitute a shifting mechanism, driven by the hydraulic multi-friction plate group, to control the operation of the planetary gear set to change the power transmission path in the gear set, thereby generating a plurality of different reduction ratio.
The electronic control system: early shift control mechanical automatic transmission hydraulic pressure variation is to decide when to do the movements of the shift, even after years of research and improved shifting performance mechanical automatic transmission remains unsatisfactory. So electronic automatic transmission will be out due to a. In order to shift the timing more precise, and get a smoother shift quality, various car manufacturers have invested a lot of resources to do research for electronically controlled automatic transmission system.
The differential
after solving the problem of vehicle power transmission, automotive engineers ran into a problem ─ another turn.
Turn, must be in addition to the steering assist system, but also necessary to be adjusted on the drive train. Due to reason that, when cornering, the inner wheel located in the path taken by the short wheel located outside the path taken longer. In the same time through this path, right and left wheels face different sides of the bound speed problems. If you do not have a special agency to deal with, will result not turn past the dilemma occurs when the vehicle is cornering; even forced to turn in the past, would have a serious problem of tire wear. At this time, the differential will be imported into the transmission system of the car.
The differential gear is constituted by a number of groups. When the straight, left and right wheels at the same speed, which effect does not occur within the gear set, as the operation of left and right wheels at the same axle. When the vehicle enters a curve, the speed difference between left and right wheels, it is absorbed by the rotation of the intermediate gear set, it can smoothly cornering.
Transmission and engine configuration
after the drive system has the basic components, automotive engineers will be based on the needs of the intended use, the drive system designed for two drive (2WD) and four-wheel drive (4WD) type.
Two-wheel drive
only the front or rear of the car can receive power, so that the rotation of the wheels of the vehicle to produce forward or backward.
This pattern has a four drive: front engine front drive (FF), a front engine rear drive (FR), the engine rear-wheel drive vehicle (MR), rear engine rear wheel drive vehicle (RR) .
Four-wheel drive
is four wheels of the car can receive power, so that the rotation of the wheels to produce the vehicle forward or backward.
Transmission means coupled with the back of the power distribution system is called a "transfer case", in accordance with the set ratio of the power transmitted to the front and rear axle, so that the four wheels of the car to gain momentum.
Currently on the market four-wheel drive (4WD) car among engine installation position belongs to the front, center, rear those who are.
Transmission and engine configuration
, including the gearbox, differential, drive shaft three important components in the drive. Transmission of priorities is the power of the engine to the wheels. Because of the car's engine in the car body decoration different way, making the engine and transmission combination to form a variety of changes. The use or combination with the properties of most car requirements. Common combinations have front-engine front-drive (FF), front-engine rear-drive (FR), mid-engine rear-drive (MR).
Front-engine front-wheel drive
is the way most modern cars. Engine and transmission are mounted in the front engine compartment. This arrangement allows the front wheels to be responsible for transmission, rather than only in charge of steering the work. Security front wheel drive and a steering burden at the same time work so that the steering control of the vehicle is simplified, thus front-engine front-drive (FF) vehicle during running is more than the other ways.
As the front-engine front-drive (FF) vehicle engine and transmission are mounted in the front engine compartment, so the main vehicle weight concentrated in the front part, this situation so that the front wheels have to bear more weight, then wheel load is much less by weight, about the front wheels to bear the body weight of about 62%.
Front-engine rear-wheel drive
this engine is the most traditional car interior layout, part of the engine and transmission are mounted at the front, and then to the drive shaft transmits power to the rear wheels to go.
Because the drive train differential and axle is the rear axle means of the vehicle, are taken together with the engine after the engine is placed longitudinally inside the chamber, so that the center of gravity falls in the engine front axle, and the greater the volume of the engine the position of the center of gravity will fall behind, the front of the vehicle, thus obtaining a good rear axle weight ratio. General models have to bear the rear axle of the vehicle body weight to about 47%, thus obtained wheel drive vehicles than the applied pressure of the drive wheel, so that with a steep slope or in a continuous curve can be obtained in better vehicle handling.
Since the center of gravity of the engine after a fall on the front axle, thus front-engine rear-drive (FR) vehicle engine may be considered to be placed in front of the mid-engine rear-drive (MR) vehicle. In recent years, some high performance and therefore a front engine rear-drive (FR) vehicle after a larger volume of engine configuration, i.e. advertised in front engine rear-wheel drive (F-MR) vehicle.
Front-engine four-wheel drive
in recent years, the popularity of four-wheel drive products with the WRC event and SUV products and consumers become familiar with the drive system.
In a sports car, all the driving force of the vehicle braking force, and the wheels are friction against the ground prior to produce, and therefore if the frictional force of the four wheels to the limit can be, will be able to have better handling performance, athletic performance, a better performance on driving performance and safety.
Front-engine four wheel drive system is the most common configuration, after the transmission power split device coupled with a package called "transfer case", in accordance with the set ratio of the power transmitted to the front and rear axle, so that four wheels of the car to gain momentum.
car to be driven on the road must make wheels turn, how the power of the engine to the wheels and the wheels turning? Responsible for transmission of power to get the car to play with the device functions is the drivetrain, the car without it becomes a generator and burn the machine.
After it is included in the base charge of the power transmission system in the connection means, the power transmission mechanism to change size, to overcome the different rotational speed differential between the wheels, and means coupling each shaft, with four main device able to transmit engine power to the wheels.
A power connection apparatus
1. Clutch: This mechanism is set between the engine means and the manual transmission, is responsible for transmitting the power of the engine gearbox hand.
2. The torque converter: This mechanism is set between the engine and gearbox from, the engine power can be smoothly transmitted to the device from the gearbox. Comprising a set of clutch torque converter, to increase the transmission efficiency.
Second, the transmission mechanism
1. manual transmission mechanism: commonly known as "manual transmission." In manually operated gear shift.
2. The automatic transmission mechanism: commonly known as "TRANSMISSIONS." By the hydraulic actuator to change the gear position.
Third, the differential
when the vehicle is turning, the wheels left and right sides will produce two different speeds, the drive shaft so the left and right sides will have two different speeds, then solved using the differential left and right two sides speed different problems.
Fourth, the drive shaft
will pass out through the power transmission system, thereby generating means is transmitted to the wheel drive force path.
Clutch means connecting the power ─
Gasoline engine powered vehicle is running, the engine continues to run. But in order to meet the demand of cars, vehicles must stop, shift and other needs, it is necessary to move them outside even at the engine, joined a group of organizations, depending on demand in order to interrupt transmission of power to the engine in case of continuous operation under reached so that the vehicle is stationary or be required Rong shift. This group of institutions, is the power of the splicing device.
Power connection device ─ clutch
clutch mechanism which is set in the device between the engine and the manual transmission is responsible for transferring the power of the engine gearbox hand. The output shaft of the engine flywheel mechanism secured together, flywheel in the housing, with a disc-shaped spring contact pressure plate, a friction plate therebetween with the gearbox input shaft.
When the clutch pedal is released, the flywheel using the pressure plate spring force, the friction plate pressed firmly, so that in between the interlocking without slip phenomenon and achieve the object of connection, the power of the engine can pass through this institutions, transfer to the gearbox, complete the powertrain work.
And when the pedal is depressed, the spring loaded mechanism will be, so that the periphery of the tilt spring, the skin will press the friction plate disengaged. At this time, the friction between the plate and the flywheel are not linked, even if the engine continues to run, the power is still not transmitted to the gearbox and the wheel, this time, the driver can perform a shift operation and stop the like, so that the engine will not stall .
Power connection device ─ torque converter
when the auto industry continues to develop, consumers began to feel tired for controlling complex three modes of operation of the accelerator pedal, brake and clutch. Mechanical engineers began thinking about how to take advantage of agencies to simplify the use of the process. Torque converter is to be imported automotive products under such circumstances, the achievements of a new experience.
Torque converter to replace the traditional mechanical clutch between the engine and is TRANSMISSIONS, capable of smooth transmission power of the engine means to TRANSMISSIONS.
From between the torque converter and clutch as different embodiment, in the torque converter, the left engine power output shaft directly connected with the pump wheel shell. In the left side of the torque converter, there is a set of turbine, connected to the transmission system on the right side of the transmission shaft. No direct connection between the guide mechanism and the turbine wheel, both sealed in the housing of the torque converter, and the torque converter is filled with the viscous liquid.
When the engine is at low speed, the torque converter will be the same throughout the low speed, the pump vane wheel will drive the viscous fluid in the torque converter, so that the flow of circulation. However, since the speed is too low, the turbine of the fluid urging the strength is not sufficient to propel the vehicle, the vehicle can stand still, as the clutch can achieve isolation.
When the accelerator pedal, the engine speed increase, the rotation speed of the impeller will simultaneously enhance, liquid flow rate continues to increase in the torque converter, the turbine continues to increase for urging, when it exceeds drag operation, the vehicle can move forward, the power It can be transmitted to the transmission system and the wheel, to achieve the purpose of power transmission.
Transmission system
car needs a relatively large acceleration at the start of the driving force, the vehicle speed is low at this time, but it must be at a higher engine speed to output larger power. When speeds up, the car driving dynamics need gradually reduced at the end, as long as this time to lower the engine speed to reduce the power output, can provide sufficient power car. The speed of the car in the process from low to high, the engine speed is changed from high to low, to how to solve the paradox of it? So this is known as "transmission" may change means the difference between the engine revolution and the transducer is born for the wheels.
Transmission is due on demand operations have "manual gearbox" and "automatic transmission" two kinds of systems, the way these two do move the gearbox is not the same. In recent years, due to advances in technology and consumer demand, the development of automobile plant called "automated manual gearbox" of the automatic transmission can be manually operated; in addition to high-performance automobile plant also developed a vehicle called "automated manual transmission "automatic operation with the manual gearbox. The current F1 racing full use of "automated manual gearbox," so using this type of manual transmission vehicles are advertised using technology from F1.
Manual transmission system
In the manual transmission clutch which contains, manual transmission two main parts.
Clutch: the engine is transmitted to the power transmission mechanism to transmit power using a friction friction sheet. Clutch models typically use only two of the friction plates, and the car load vehicle using a clutch friction plate more. CLUTCH also two kinds of wet and dry, wet clutch hardly be used in the current car above.
Manual gearbox: do manually operated transmission gear converting operation, the gear input shaft and the output shaft of the manual transmission meshes. A plurality of sets with different numbers of teeth of the gear after the meshing, can produce various ratios deceleration. The current manual transmission are synchronized using gears engaging mechanism, so that a more simple operation of the shift, the shift smoothness is also better.
Self-scheduling transmission system
in order to make operation of the vehicle becomes simple, and let not good at operating manual gearbox the driver can easily drive a car, so a way to manufacture automatic gearbox changing gear has become an important work, so engineers developed the world's first car with automatic transmission in 1940. Since then driving a car at the start, stop, and acceleration and deceleration during traveling, the driver will not need to do the shifting operation.
A modern automatic transmission fluid torque converter which comprises three main parts automatic gearbox, electronic control system. Join manual shift control program in the electronic control system inside, it becomes a manual operation function "automated manual gearbox."
Torque converter liquid: between active and passive impeller wheel using hydraulic oil as medium to transmit power. The power transmission from the input shaft to the output shaft, the transmission output shaft to the automatic transmission via power again.
Because hydraulic oil is flowing between the active and the passive impeller wheel will consume most of the power. In order to reduce the loss of power, between the active and the passive wheel was added to make a set of rotor vanes without increasing the efficiency of energy transfer; and adding a set of clutch in the torque converter fluid, and utilizing appropriate driving state of the clutch with the active passive wheel lock, so that between the active and passive wheel speed differences are no longer, thereby increasing the efficiency of power transmission.
Automatic transmission: the planetary gear set constitute a shifting mechanism, driven by the hydraulic multi-friction plate group, to control the operation of the planetary gear set to change the power transmission path in the gear set, thereby generating a plurality of different reduction ratio.
The electronic control system: early shift control mechanical automatic transmission hydraulic pressure variation is to decide when to do the movements of the shift, even after years of research and improved shifting performance mechanical automatic transmission remains unsatisfactory. So electronic automatic transmission will be out due to a. In order to shift the timing more precise, and get a smoother shift quality, various car manufacturers have invested a lot of resources to do research for electronically controlled automatic transmission system.
The differential
after solving the problem of vehicle power transmission, automotive engineers ran into a problem ─ another turn.
Turn, must be in addition to the steering assist system, but also necessary to be adjusted on the drive train. Due to reason that, when cornering, the inner wheel located in the path taken by the short wheel located outside the path taken longer. In the same time through this path, right and left wheels face different sides of the bound speed problems. If you do not have a special agency to deal with, will result not turn past the dilemma occurs when the vehicle is cornering; even forced to turn in the past, would have a serious problem of tire wear. At this time, the differential will be imported into the transmission system of the car.
The differential gear is constituted by a number of groups. When the straight, left and right wheels at the same speed, which effect does not occur within the gear set, as the operation of left and right wheels at the same axle. When the vehicle enters a curve, the speed difference between left and right wheels, it is absorbed by the rotation of the intermediate gear set, it can smoothly cornering.
The drive shaft
from the engine power output, after conversion of the transmission system, transmitted to the drive wheels, the driving force can be generated on the side of the vehicle. And is responsible for transmitting the power to the drive wheels of the organization, is the drive shaft. And depending on the configuration of the transmission system it can also be divided into two drive shafts and axles and so on.
Drive shaft
after the front-engine front-engine rear-wheel drive or four-wheel drive in cars, because the rear-wheel drive to be responsible for the work, it must be power transmission to the rear axle differential to transfer power to turn wheel. Only through the long link beneath the entire body, is the drive shaft. In the front engine front drive vehicle (the FF), rear engine rear wheel drive vehicle (RR), the engine rear-wheel drive vehicle (the MR), the three transmission mode the car is not equipped with a drive shaft, after the power transmission and differential output, it is directly connected to the axle.
Shaft
transmitting power from the differential to the wheel axis. Axle also known as "axle" or "drive." In general of FF vehicle, the transmission system will be arranged as shown, the engine, transmission and differential are connected together, the axle is directly connected, the power is transmitted directly to the right and left wheels to drive the vehicle .
from the engine power output, after conversion of the transmission system, transmitted to the drive wheels, the driving force can be generated on the side of the vehicle. And is responsible for transmitting the power to the drive wheels of the organization, is the drive shaft. And depending on the configuration of the transmission system it can also be divided into two drive shafts and axles and so on.
Drive shaft
after the front-engine front-engine rear-wheel drive or four-wheel drive in cars, because the rear-wheel drive to be responsible for the work, it must be power transmission to the rear axle differential to transfer power to turn wheel. Only through the long link beneath the entire body, is the drive shaft. In the front engine front drive vehicle (the FF), rear engine rear wheel drive vehicle (RR), the engine rear-wheel drive vehicle (the MR), the three transmission mode the car is not equipped with a drive shaft, after the power transmission and differential output, it is directly connected to the axle.
Shaft
transmitting power from the differential to the wheel axis. Axle also known as "axle" or "drive." In general of FF vehicle, the transmission system will be arranged as shown, the engine, transmission and differential are connected together, the axle is directly connected, the power is transmitted directly to the right and left wheels to drive the vehicle .
Transmission and engine configuration
after the drive system has the basic components, automotive engineers will be based on the needs of the intended use, the drive system designed for two drive (2WD) and four-wheel drive (4WD) type.
Two-wheel drive
only the front or rear of the car can receive power, so that the rotation of the wheels of the vehicle to produce forward or backward.
This pattern has a four drive: front engine front drive (FF), a front engine rear drive (FR), the engine rear-wheel drive vehicle (MR), rear engine rear wheel drive vehicle (RR) .
Four-wheel drive
is four wheels of the car can receive power, so that the rotation of the wheels to produce the vehicle forward or backward.
Transmission means coupled with the back of the power distribution system is called a "transfer case", in accordance with the set ratio of the power transmitted to the front and rear axle, so that the four wheels of the car to gain momentum.
Currently on the market four-wheel drive (4WD) car among engine installation position belongs to the front, center, rear those who are.
Transmission and engine configuration
, including the gearbox, differential, drive shaft three important components in the drive. Transmission of priorities is the power of the engine to the wheels. Because of the car's engine in the car body decoration different way, making the engine and transmission combination to form a variety of changes. The use or combination with the properties of most car requirements. Common combinations have front-engine front-drive (FF), front-engine rear-drive (FR), mid-engine rear-drive (MR).
Front-engine front-wheel drive
is the way most modern cars. Engine and transmission are mounted in the front engine compartment. This arrangement allows the front wheels to be responsible for transmission, rather than only in charge of steering the work. Security front wheel drive and a steering burden at the same time work so that the steering control of the vehicle is simplified, thus front-engine front-drive (FF) vehicle during running is more than the other ways.
As the front-engine front-drive (FF) vehicle engine and transmission are mounted in the front engine compartment, so the main vehicle weight concentrated in the front part, this situation so that the front wheels have to bear more weight, then wheel load is much less by weight, about the front wheels to bear the body weight of about 62%.
Front-engine rear-wheel drive
this engine is the most traditional car interior layout, part of the engine and transmission are mounted at the front, and then to the drive shaft transmits power to the rear wheels to go.
Because the drive train differential and axle is the rear axle means of the vehicle, are taken together with the engine after the engine is placed longitudinally inside the chamber, so that the center of gravity falls in the engine front axle, and the greater the volume of the engine the position of the center of gravity will fall behind, the front of the vehicle, thus obtaining a good rear axle weight ratio. General models have to bear the rear axle of the vehicle body weight to about 47%, thus obtained wheel drive vehicles than the applied pressure of the drive wheel, so that with a steep slope or in a continuous curve can be obtained in better vehicle handling.
Since the center of gravity of the engine after a fall on the front axle, thus front-engine rear-drive (FR) vehicle engine may be considered to be placed in front of the mid-engine rear-drive (MR) vehicle. In recent years, some high performance and therefore a front engine rear-drive (FR) vehicle after a larger volume of engine configuration, i.e. advertised in front engine rear-wheel drive (F-MR) vehicle.
Front-engine four-wheel drive
in recent years, the popularity of four-wheel drive products with the WRC event and SUV products and consumers become familiar with the drive system.
In a sports car, all the driving force of the vehicle braking force, and the wheels are friction against the ground prior to produce, and therefore if the frictional force of the four wheels to the limit can be, will be able to have better handling performance, athletic performance, a better performance on driving performance and safety.
Front-engine four wheel drive system is the most common configuration, after the transmission power split device coupled with a package called "transfer case", in accordance with the set ratio of the power transmitted to the front and rear axle, so that four wheels of the car to gain momentum.
Reproduced in: https: //www.cnblogs.com/licheng/archive/2008/09/29/1302303.html