The clutch assist cylinder includes an outer cylinder having the same outer diameter as that of the existing booster cylinder, a partition separated by a partition in the outer cylinder, two front and rear cylinders, and one front piston and one rear piston respectively located in the two cylinders . The front piston has a neck coaxially extending rearwardly therethrough and passing through the partition plate and abutting against the rear piston, the front piston having a communication hole coaxial therewith and penetrating through the neck thereof; the piston rod has a a collar having an outer diameter larger than the through hole and resisting the front end surface of the front piston, and the piston rod portion behind the collar penetrates into the through hole and is fixedly coupled to the rear piston. The pressurizing chambers of the front and rear cylinders communicate and share an intake and exhaust hole; the back pressure chambers of the front and rear cylinders communicate and share a breathing hole. It does not change the shape, installation and interface size and position of the existing booster cylinder, and its output pressure is increased by 33% to 40% compared with the existing booster cylinder, ensuring sufficient driving force to separate the clutch.

Master pump structure and working principle

Working principle: When the clutch pedal is depressed, the push rod 9 pushes the clutch main pump piston 7 to the left, the piston inlet valve 3 is closed under the action of the conical spring and the oil pressure, and the main pump pressure chamber is isolated from the oil supply chamber, the pressure chamber As the pressure rises, the high-pressure oil is discharged from the oil outlet and is assisted by the oil pipe to the clutch.

Oil chamber: When the clutch pedal is released, the master pump piston 7 is quickly moved right to the initial position shown by the return spring 1, and the limit screw 5 is opened to open the piston inlet valve 3, the pressure chamber and the oil supply chamber. Connected, no oil pressure in the oil pipeline.

Booster structure and working principle

Working principle: 1# is the compressed air input port, 4# is the inlet port connected to the clutch master cylinder, 31# is the exhaust port, and 32# is the hydraulic chamber vent.

Clutch separation: When the pedal is depressed, the master cylinder brake fluid is input into the A chamber from the 4# port, acting on the piston rod a, causing the push rod b to push to the left. At the same time, the brake fluid enters the C cavity through the j path, pushes the control valve stem c to the left, opens the valve f, and the compressed air flows into the B cavity through the g channel. Under the simultaneous action of the air pressure and the hydraulic pressure, the push rod b continues to move to the left, thereby separating the clutch.

Clutch engagement: Release the pedal and the hydraulic pressure of the 4# port drops to zero. Under the action of the return spring d and the air pressure, the control valve rod c moves to the right, closes the valve f, the air passes through the channel h of the control valve stem to the atmosphere through the 31# port, the piston rod returns to the position, and the push rod b is returned. The spring d also returns to the starting position