What is a transmission and what does it do?
The automobile transmission is an important part of the automobile transmission system second only to the engine, which is mainly used to change the torque and speed of the engine transmitted to the drive wheel, in order to make the car obtain different traction and speed under various driving conditions, while making the engine work in the most favorable working range.
1, by changing the transmission ratio to expand the driving force and speed of the car
Circumference to adapt to frequently changing driving conditions, at the same time, so that the engine in the most favorable conditions to work.
2, under the condition that the direction of engine rotation is unchanged, the car can be reversed
Move.
3. Interrupt the power transmission of the engine to the drive axle so that the engine can
Start and idle speed to meet the needs of temporary car parking.
(1) Type of transmission:
(1) According to the change of transmission ratio:
① Stepped transmission: there are several optional fixed transmission ratios, using gear transmission. It can be divided into two kinds: ordinary gear transmission with fixed gear axis and planetary gear transmission with partial gear (planetary gear) axis rotating.
② Continuously variable transmission (CVT): the transmission ratio can be continuously changed within a certain range, common hydraulic, mechanical and electric.
③ Integrated transmission: composed of hydraulic torque converter and gear type stepwise transmission.
(2) According to the control mode
① Forced control transmission: rely on the driver to directly control the shift lever to shift.
② Automatic control transmission: the selection and shift of the transmission ratio are automatic. The driver only needs to manipulate the accelerator pedal, and the transmission can control the actuator according to the load signal and the speed signal of the engine to achieve the shift of gear.
③ Semi-automatic control transmission: can be divided into two categories, one is partial automatic shift, partial manual (forced) shift; The other is to select the gear with the button in advance, and change the gear by the actuator itself when the clutch pedal is pressed or the accelerator pedal is released.
Manual Transmission (MT)
ManualTransmission (MT), also known as mechanical transmission, that is, you must use the hand to move the gear shift lever, in order to change the gear mesh position in the transmission, change the transmission ratio, so as to achieve the purpose of speed change.
Manual transmissions are mostly in five gears, but also four and six or more.
Manual transmissions usually come with synchronizers for easy shifting and low noise.
Manual transmission in the operation must step on the clutch, in order to move the shift lever.
Manual transmission (MT) advantages of high transmission efficiency ratio, in theory will be more fuel efficient, cheap.
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