1, to ensure a smooth start car is the primary function of the clutch. Before starting the car, the natural first start the engine. The car started, the car is completely stationary state gradually accelerated. If the transmission system (which links the whole car) rigidly linked with the engine, the transmission, a hanging file, the car will suddenly dash forward a bit but does not start. This is because when the car from rest to pediment, have a great inertia, causing the engine drag torque greatly. Role in the resistance moment of inertia, the engine speed at the time instant a sharp decline to the lowest speed (usually 300-500RPM) below, the engine is stalled and can not, of course, cars can not be started. Therefore, we need the help of the clutch. After starting the engine, the car started before the first driver depresses the clutch pedal, clutch, disengage the engine and drive train, transmission, and then hang up file, and then gradually release the clutch pedal, the clutch engagement gradually. In the bonding process, the engine torque increases the delay, it should also gradually press the accelerator pedal, that is to gradually increase the amount of fuel to the engine, the engine speed is always kept to a minimum steady speed, and without flame. At the same time, due to the tightness of the clutch engagement gradually increasing, the engine driving the wheels through the transmission line pass will gradually increase the torque, enough to overcome the initial resistance to traction, the car started from rest and gradually accelerated movement 2, to ensure that transmission system for work smoothly when the file 2: to achieve a smooth shift in the car driving the process, to adapt to changing driving conditions, often have to switch to a different drive train gear work. Shift the gear-type transmission, toggle gear is generally linked to files or other agencies, to allow use of a gear transmission gear launch, and then make another stall gear into work. In the shift before the clutch pedal, interrupt power transmission, easy to make the original stalls meshing pair disengaged, while the new gear meshing pair of meshing parts of the trend in the rate of synchronization, so meshing into the impact can be greatly reduced to achieve a smooth shift. 3, to prevent overloading transmission system for emergency braking when the vehicle is, if there is no clutch, the engine and transmission system will be rigid due to sharply reduce the speed in which all moving parts and thus will have a great moment of inertia (its value may be much higher than given by the engine to work the maximum torque), the transmission system exceeds its carrying capacity caused by the load, leaving the mechanical damage. With the clutch, you can rely on the clutch and the driven part of the active part of the relative motion between the potential to eliminate this danger. Therefore, we need the clutch to limit the transmission system to withstand the maximum torque, and ensure safety. Clutch can be divided into: friction clutch, transmission or use of the liquid as a medium (ie fluid coupling), or the use of magnetic drive (that is, the electromagnetic clutch).
Coming out of the engine power is uniform, the Department can not accept the sudden drive torque. By too much friction to turn into heat energy consumed. The role of soft connection, either manually or automatically is true, there is a separate role. Prevent damage to the car on some of the components. Clutch is an important device for cutting off power. Linked to any block (such as neutral), the clutch should step in the end.

Shift before the clutch foot in the end, that is, the power is completely disconnected. Back to a combination of state between gears.

Neutral gear is off the power block.
Shift lever in neutral position, disconnect the power on. Need not always stepping on the clutch.
Clutch is very important, very Jiao sex.

Some car lost control when the lower gear to slow down can not reason is a bad clutch, not to power off.
Clutch installed between the engine and transmission, to the separation or bonding force between front and rear contact. Its function is:

  (1) make the car a smooth start.

  (2) interruption to the power transmission system, with the shift.

  (3) to prevent transmission line overload.

  Clutch works

  Active part and the driven clutch part by the friction between the contact surfaces, or as a transmission medium with liquid (fluid coupling), or with magnetic drive (electromagnetic clutch) to transmit torque, so that between the two can temporary separation, but also gradually bonding, in the transmission process and allow the two parts of each rotation.

  Now widely used in the car with spring-loaded friction clutch (referred to as the friction clutch).

  Engine torque sent through the flywheel and pressure plate and driven plate friction contact surface, pass the driven plate. When the driver depresses the clutch pedal, through mechanical transmission, the big-driven diaphragm spring pressure after-hours shift, this time driven part and active part of the separation.

  Friction clutch should be able to meet the following basic requirements:

  (1) guaranteed to pass the engine's maximum torque issue, and there is some spare capacity to transmit torque.

  (2) separation can be done, the complete separation of the junction when the soft and has good heat dissipation.

  (3) moment of inertia of the driven part of some as small as possible. Thus, the separation clutch, the transmission input shaft is connected with the

  Easier part of the speed change between gears so as to reduce the impact.

  (4) has a moderate impact on the direction of rotation, the direction of the vibration attenuation ability, and noise.

  (5) pressure plate and friction plate pressure changes in the friction coefficient of small, stable.

  (6) effort operation and easy maintenance.

  The type of clutch

  Clutch friction clutch, fluid coupling, electromagnetic clutches and other types. Friction clutch is divided into two kinds of wet and dry.

  Fluid coupling by the working fluid (oil) transmit torque, casing and pump wheel as a single entity, is the active parts; turbine wheel relative to the pump, the follower. When the pump wheel speed is low, the turbine can not be driven, active pieces and a state of separation between the follower; with the pump wheel speed increases, the turbine is driven between the active components in the bonding with the follower state.

  Pass through the electromagnetic clutch coil power to control the clutch engagement and separation. If the initiative is placed between the magnetic and follower, you can strengthen the connection between the two work together, such as magnetic electromagnetic clutch clutch.

  At present, compatible with the manual transmission clutch is dry most of the friction clutch driven plate according to the number, divided into single-disc, double disc and multi disc several. Wet friction clutch disc is generally more, and so immersed in the oil cooling.

  As the use of a number of compression springs spiral springs, and these springs along the circumferential distribution of pressure plate clutch spring clutch cloth called weeks. Used as a compression spring diaphragm spring clutch as clutch diaphragm spring.