Automotive CAN bus simulation development tool micro car braking system

Causes and maintenance methods of microcar braking system failures - Automobile Bus 1. Braking noise
, the brake drum is out of round and its roundness error exceeds., the working surface of the brake drum is deformed into an ellipse), and the friction plate and the friction plate during braking The brake drum collides instantly and makes a sharp impact sound. During maintenance, the brake drum should be removed and bored according to the specifications. The balance performance should be checked and the unbalance amount should be controlled within.
When the surface of the brake friction plate is too smooth, the friction coefficient is small and the braking pressure is high, friction noise will be generated when the smooth surface rubs. Or foreign matter is stuffed between the friction pairs to squeeze the friction surface, which will also cause friction noise. During maintenance, remove the brake drum, remove foreign matter and polish the friction pad with coarse sandpaper, so that the contact area of the friction pair reaches Yunxia Pure Umbrella?
The brake friction pad is severely worn, with grooves and irregular shapes appearing on the surface. , it cannot fully and effectively fit the brake drum during braking, or the brake support plate is deformed, destroying the coaxiality of the drum and the disc, causing local friction and collision to cause noise. During maintenance, the friction plate should be replaced and the brake support plate should be corrected.
If the front wheel bearing is damaged, the surface of the raceway and balls will appear pitted, grooved or even broken, and abnormal noise will occur during braking while driving. This noise can be eliminated by replacing the front axle head bearing.
2. Poor braking or failure
The brake pipe (such as the joint) is leaking or blocked, the brake fluid is insufficient, the brake oil pressure drops and the brake fails. The brake pipelines should be checked regularly to eliminate leaks, add brake fluid, and clear the pipelines.
. The air entering the brake pipe makes the brake sluggish. The brake pipe is heated, and the residual pressure in the pipe is too small, causing the brake fluid to vaporize and bubbles to appear in the pipe. Since the gas is compressible, the braking torque decreases during braking. During maintenance, the air in the brake cylinder and pipe can be drained and enough brake fluid can be added.
Improper brake clearance. The gap between the working surface of the brake friction plate and the working surface of the inner wall of the brake drum is too large, and the stroke of the piston of the pump is too large during braking, resulting in slow braking and reduced braking torque. During maintenance, fully adjust the brake clearance according to the specifications, that is, use a flat-head screwdriver to turn the ratchet from the high-speed hole to fully open the brake shoe and eliminate the gap, and then return the ratchet 3~ teeth to obtain the specified clearance.
, poor contact between the brake drum and the friction lining, deformation of the brake shoe or the roundness of the brake drum exceeds., resulting in poor contact between the friction lining and the brake drum, and the braking friction torque decreases. If this phenomenon is found, it must be boring or adjusted and repaired. The diameter of the brake drum after boring should not be larger than that, otherwise it should be replaced with new parts.
If the brake friction plate is contaminated with grease or soaked in water and damp, the friction coefficient will decrease sharply, causing brake failure. During maintenance, remove the friction plate and clean it with gasoline, and heat and bake it with a blowtorch to allow the oil that has penetrated into the plate to seep out. If the oil leakage is serious, the new plate must be replaced. For friction plates soaked in water, continuous braking can be used to generate heat energy to evaporate the water and restore its friction coefficient.
The brake master cylinder, wheel cylinder cup (or other parts) are damaged, the brake pipeline cannot generate the necessary internal pressure, and the oil leaks, resulting in poor braking. The brake master cylinder and wheel cylinder cup should be dismantled and inspected in time, and abrasion-damaged parts should be replaced.