1. Wear of the tensioner pulley
The function of the tensioner pulley is to tension the engine belt so that the generator and power steering pump do not slip. Due to long-term pressure and high-speed rotation, the tensioner bearings are easy to wear and cause noise and resonance. When the inspection determines that the buzzing and resonance are caused by the tensioner, you should also check the motor foot rubber, because the function of the motor foot rubber is to slow down the vibration and noise produced by the motor.
2. Exhaust deformation
Typically, the exhaust pipes of front-engine models extend from the bottom of the car to the rear when driving on bad roads or in the event of an impact against the chassis. to cause dents and deformation of the exhaust pipes. The deformed exhaust pipe increases the resistance of the exhaust, so thate the exhaust pipe will produce a humming and resonant sound.
3. Wear of wheel hub bearings
The wheel hub bearing is installed in the “goat horn” of the suspension. It supports the weight and impact of the vehicle at all times on a daily basis. conduct. The bearing balls it contains are easy to wear, and the most typical symptoms of bearing wear are car humming and resonance.
1. The generator bearing may be damaged.
2. Engine oil pressure is too low.
3. The engine is overheating.
4. Carbon deposits in the engine.
5. The quality of the oil is not good.
Detailed information:
A car engine is a device that provides energy to a car. . The heart of the car determines the power, economy, stability and environmental protection of the car. SeAccording to different energy sources, automobile engines can be divided into diesel engines, gasoline engines, electric vehicle engines and hybrid engines.
Common gasoline engines and diesel engines are reciprocating piston internal combustion engines, which convert the chemical energy of the fuel into the mechanical energy of the piston movement and power output to the outside. The gasoline engine has high speed, low mass, low noise, easy starting and low manufacturing cost; The diesel engine has high compression ratio, high thermal efficiency and better economic performance and emission performance than gasoline engine.
The motor is an energy conversion device. Its function is to convert the thermal energy of gasoline (diesel) into mechanical energy by burning and expanding the gas in a sealed cylinder to push the piston to performr work.
References:
Baidu Encyclopedia - Car Engine