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When the driver steps on the clutch pedal, the push rod pushes the master cylinder piston to increase the oil pressure, enters the wheel cylinder through the hose, and forces the wheel cylinder lever to push the release fork, pushing the release bearing forward; when the driver releases the clutch pedal, The hydraulic pressure is released, the release fork is gradually returned to its original position under the action of the return spring, and the clutch is in the engaged state again. There is a radial oblong through hole in the middle of the clutch master cylinder piston. The direction-limiting screw passes through the oblong hole of the piston to prevent the piston from rotating. The oil inlet valve is inserted into the axial hole at the left end of the piston, and the oil inlet valve seat is inserted through the straight hole on the piston surface. In the piston hole. When the clutch pedal is not stepped on, there is a gap between the master cylinder push rod and the master cylinder piston. Due to the limit screw restricting the oil inlet valve, there is a small gap between the oil inlet valve and the piston. In this way, the oil storage cylinder communicates with the left cavity of the master pump through the pipe joint, the oil passage, and the oil inlet valve. When the clutch pedal is stepped on, the piston moves to the left, and the oil inlet valve moves to the right relative to the piston under the action of the return spring, eliminating the gap between the oil inlet valve and the piston. Continue to step on the clutch pedal, the oil pressure in the left cavity of the master cylinder will rise, and the brake fluid in the left cavity of the master cylinder will enter the booster through the oil pipe, the booster works and the clutch is disengaged. When the clutch pedal is released, the piston moves to the right quickly under the action of the spring in the same position. Because the brake fluid has a certain resistance in the pipeline, it flows back to the master cylinder at a slower speed, so a certain amount is formed in the left cavity of the master cylinder. Vacuum degree, the oil inlet valve moves to the left under the action of the pressure difference between the left and right oil chambers of the piston, a small amount of brake fluid in the oil storage cylinder flows into the left cavity of the master cylinder through the oil inlet valve to make up for the vacuum. When the original brake fluid from the master cylinder into the booster flows back to the master cylinder, excess brake fluid appears in the left cavity of the master cylinder, and this excess brake fluid will flow back to the oil reservoir through the oil inlet valve. Send feedback History

One hundred Tesla "brake failures" are caused by incorrect use of pedals. Authoritative reports from the United States are astonishing Recently, from the US Department of Transportation Highway and Transportation Safety Administration (NHTSA), in every accident reviewed by ODI, there is evidence that the accident was caused by the wrong use of the pedal. According to the investigation report from the US Highway Safety Administration (NHTSA), the investigation has been filed on January 13, 2020 and closed on January 8, 2021. It lasted one year and the vehicle models covered the Tex from 2012 to 2020. There are four models of Model S/X/3/Y produced by the company. A total of 246 accidents were investigated. The report stated that after reviewing all the data, ODI found no evidence to support the vehicle's SUA defect or brake failure. In every accident reviewed by ODI, there is evidence that the accident was caused by the wrong use of the pedal. In addition, no reasons for failures were found in the accelerator pedal, motor control system, and braking system, including the reasons for the accelerator failure caused by unreasonable design. The report also pointed out that the accident was caused by software, malfunctions, etc. The theory caused by the failure of the electronic system is an inaccurate assumption. And failures caused by system failures caused by electronic systems such as software and bugs have also become important problems.