Exhaust gas recirculation control system is currently an effective measure for reducing NOx emissions in exhaust gas. Its main actuator is a numerically controlled EGR valve, which is used to accurately control the amount of exhaust gas recirculated to the engine independently. The ECU timely adjusts the circulation rate of exhaust gas participating in recirculation according to the working conditions of the engine. When the engine is running under load, the EGR valve opens, and a part of the exhaust gas is introduced into the intake pipe to mix with the new mixed gas and enter the cylinder for combustion, thereby realizing recirculation. And the exhaust gas sent to the intake system is optimally controlled, so as to suppress the generation of harmful gas NOx and reduce its emission in the exhaust gas. However, excessive exhaust gas participating in recirculation will affect the ignition performance of the mixture, thereby affecting the power performance of the engine, especially when the engine is idling, low speed, light load and cold engine, the recirculated exhaust gas will obviously affect the engine performance.
The anti-lock braking system detects the speed of each wheel through the speed sensor installed on each wheel or drive shaft, calculates the wheel slip rate, and compares it with the ideal slip rate to increase or decrease the braking force of the brake. According to the determination of the pressure, the actuator is ordered to adjust the brake pressure in time to keep the wheels in an ideal braking state, that is, the wheels can always be braked in a rolling state with slight slip without locking. This has become the standard configuration of small passenger cars at present.