What causes brake failure in the Changan Benben New Energy e-star?
2 Answers
Benben E-Star has experienced batch issues with the brake vacuum booster pump, resulting in the brake pedal becoming stiff during driving, making it difficult to press down, leading to reduced braking effectiveness and a sensation of brake failure. The role of vacuum assistance: Unlike traditional gasoline-powered vehicles, the vacuum assistance in new energy vehicles does not come from the vacuum generated by the engine's intake system during operation, as most new energy vehicles do not have an engine. To leverage mature component systems as much as possible, many new energy vehicles opt to use an electric pump to simulate the engine's vacuum assistance. The vacuum pump maintains the vacuum level in the assistance system at several tens of kilopascals or higher to provide sufficient braking support. Vacuum assistance failure: When the system's vacuum level drops, the electric pump activates to replenish the vacuum, which is why many new energy vehicles produce intermittent operational noise.
As someone who frequently drives new energy vehicles, the issue of brake failure in the Changan Benben e-star can be analyzed from several perspectives. New energy vehicles are equipped with a kinetic energy recovery system. If this electronic control system malfunctions, the deceleration effect when releasing the throttle will diminish. Additionally, if the brake booster pump operates abnormally, the brake pedal will feel unusually hard when pressed. Sometimes, wheel sensors covered in mud can transmit incorrect signals, affecting the performance of the anti-lock braking system. Moreover, low brake fluid levels or oil leaks in the pipelines can lead to sudden brake failure. These situations are more likely to occur in humid weather or after prolonged parking, and professional equipment is required to read fault codes for accurate problem identification. Regular maintenance is essential: brake fluid should be replaced if it turns black, and wheel sensor wires should not be tampered with casually.
