As soon as the speed increases, the engine sounds louder.

1. Causes and solutions of loud noise of speed-up engine: clean throttle, repair or replace spark plug and ignition coil, and replace oxygen sensor of exhaust system.

1, clean the throttle. As soon as the engine accelerates, the noise is particularly loud. If the throttle is dirty, the noise can be improved by cleaning the throttle.

2. Repair or replace the spark plug and ignition coil. If the engine is particularly loud when it is speeding up, it is caused by the ignition system, which is generally related to the problems of spark plugs and ignition coils. It can be repaired after inspection and replaced if necessary.

3. Replace the oxygen sensor of the exhaust system. When the oxygen sensor of the exhaust system is broken, the intake data will also be inaccurate, and the engine noise will be particularly loud when the speed is increased. At this time, it can be solved by replacing the sensor.

principle ofinternal combustion engine

The working principle of an engine, mainly referred to as an internal combustion engine, mainly includes four strokes, namely, intake stroke, compression stroke, power stroke and exhaust stroke.

1. Intake: As the first stroke, this is mainly the process of the piston from the top dead center to the bottom dead center of the cylinder.

2. Compression: After the piston moves, the intake valve and exhaust valve are closed, and the intake air will be compressed just now, resulting in high temperature.

3. Doing Work: Driven by the starter, the crankshaft will drive the piston to do this reciprocating motion. When a cylinder does work, it can do work by itself.

4. Exhaust: The exhaust stroke is different from the first stroke. This is mainly the process from bottom dead center to top dead center. After that, the burnt exhaust gas will be discharged from the cylinder, the exhaust valve will be opened and the intake valve will still be closed.