BMW

Cylinder head covers serve to seal off the cylinder head space from the outside of the engine. As a result of operation of the internal combustion engine, blow-by gases from the combustion process and oil droplets from the lubricant system of the engine are present inside the cylinder head

The intake hose is between the throttle valve and the engine intake valve. It is the intake pipe from the carburetor or throttle body to the cylinder head intake duct.

The engine is as follows:
1.Engine Mount Liter power: The index based on the output power of the crankshaft of the engine is called the effective index, which indicates the performance of the whole engine. Effective indicators include effective power, effective torque, power liter and so on. Power and torque these two indicators can reflect the quality of the engine. 2. Fuel economy: Automobile fuel economy is an important performance of automobiles. Fuel consumption refers to the fuel volume required per unit of mileage when the vehicle is fully loaded. Our country and Europe are expressed by the number of fuel consumed when driving 100 kilometers (L).
3. Ride comfort: that is, the vibration of the engine when it is running. This performance directly affects the comfort of the vehicle. This performance directly reflects the mechanical quality of the motor.
4. durability: reflect the quality of the engine.

The function of exhaust gas circulation valve is:
1. Keep the ventilation in the crankcase, keep the exhaust gas in the crankcase into the main intake pipeline through the circulation valve, and burn together with the combustible mixture, so as to eliminate the harmful gases in the oil and gas and discharge into the atmosphere.
2. Exhaust gas circulation valve has a certain function of liquefied petroleum gas. When the oil vapor reaches the circulating valve position, it will be liquefied into oil, and then flow back to the crankcase after cooling the valve body, which can effectively avoid the problem of excessive fuel consumption.
3. The exhaust gas recirculation valve is located on the branch pipe of the automobile exhaust pipe, which belongs to the exhaust gas recirculation system. The main purpose is to reduce nitrogen oxides (NOx) in exhaust gas and improve fuel economy under partial load.
4. Exhaust gas recirculation (EGR) means that part of the exhaust gas emitted by the engine is sent back to the intake pipe and re-enters the cylinder with fresh air mixture.
5. EGR system is the main measure to reduce nitrogen oxides (NOx) in exhaust gas.

1. Electric Steering Gear only in the steering motor to provide power, can significantly reduce fuel consumption; 2. The size of steering power can be adjusted by software, which can give consideration to the lightness of steering at low speed and the manipulation stability at high speed, and the positive performance is good. 3. Compact structure, light weight, good assembly line, easy maintenance;
4. through the program Settings, electric power steering system is easy to match with different models, can shorten the production and development cycle. Because of the above advantages, electric power steering system has been used more and more widely in recent years.

The method to distinguish whether the Engine Coolant Thermostat Assembly is good or bad is:
1. According to the method of judging whether the thermostat is good or bad according to the car, it can be judged directly in the car without removing the engine coolant thermostat housing assembly from the engine, and judge through the temperature difference between the upper and lower water pipes;

2. The thermostat housing assembly is disassembled and inspected, and the temperature at which the thermostat is opened is measured by boiling the thermostat after being removed from the engine. Automobile thermostat is a valve that can control the flow path of engine coolant. This product automatically adjusts the amount of water entering the radiator according to the temperature of the cooling water to ensure that the engine works within a suitable temperature range and can save energy.