HS code-driven customs risk scoring

List of the catalog of this article:

• 1,HS code-driven customs risk scoring What does car timing system mean
• 2, How often should the car timing belt be changed
• 3, What are the symptoms of car timing misalignment
• 4, How to judge whether the timing chain should be changed

What does the car timing system mean

1. Timing refers to the gas distribution mechanism that drives the engine to open or close the intake valve and exhaust valve of the engine at the right time to ensure that the engine cylinder can inhale and exhaust normally. Engine timing is also known as ignition timing.

2. There are the following three types of engine timing systems: timing is an important part of the engine gas distribution system. It ensures the accuracy of intake and exhaust time by connecting with the crankshaft and cooperating with a certain transmission ratio. It is usually composed of timing belt, tensioner wheel, tensioner, water pump and other accessories.

3. [Pacific Automobile Network] Time means the gas distribution mechanism that drives the engine to open or close the engine intake and exhaust valves at the appropriate time to ensure that the engine cylinder can inhale and exhaust normally. The timing of the car will vary depending on the engine.

4. This kind of time coordination, such as the opening and closing time of each valve and the ignition time of the spark plug, are guaranteed by the timing system of the engine. There are various gears on the camshaft and crankshaft that drive the valve, and the transmission ratio between them is 2:1.

5. The most commonly used is through the belt or chain, which is the so-called timing belt and timing chain. Because the mechanical connection between the crankshaft and the camshaft must be precise, and the position of each other cannot change, the timing belt is equipped with convex teeth, so that it will not slip at work.

6. The normal operation of the engine depends on the exact time matching between the components. For example, the on-off time of each valve and the ignition time of the spark plug are guaranteed by the timing system of the engine.

How often should the car timing belt be changed

The timing belt should be replaced every five years.The main function of the engine timing belt is to open or close the intake and exhaust valves of the engine at the right time to ensure that the engine cylinder can inhale and exhaust normally.

The timing belt is replaced every five years. The main function of the engine timing belt is to drive the gas distribution mechanism of the engine to open or close the engine inlet and exhaust valves at the appropriate time to ensure that the engine cylinder can inhale and exhaust normally.

The timing belt of the car should be replaced every 3 to 5 years or about 80,000 to 100,000 kilometers. The specific replacement time is recommended to refer to the vehicle maintenance manual, but it also depends on the actual use of the car.

The timing belt needs to be replaced once every 60,000 to 80,000 kilometers. The timing belt is an important part of the engine gas distribution system. The accuracy of the intake and exhaust time is ensured by connecting with the crankshaft and cooperating with a certain transmission ratio.

The timing belt generally needs to be replaced after driving 60,000 to 80,000 kilometers. The timing belt of a car is an important device in the car engine, which is very useful to the car. It is a wear-and-wear product. Once the timing belt breaks, the camshaft will definitely not run at the right time.

Therefore, it needs to be replaced regularly. Automobile manufacturers clearly stipulate that the regular replacement time of the timing transmission system is generally 60,000 kilometers, but this does not take into account the actual use. The quality of the synchronous belt is excellent and inferior, and the aging time is also different in different environments.

What are the symptoms of car timing misalignment

Time misalignment will generally cause car ignition advance or delay, engine shaking, insufficient power, etc.

The reaction of non-timed cars is as follows: the car is not timing correctly, the vehicle's power is insufficient, and the vehicle will shake when idling; the timing belt is connected to the camshaft and crankshaft, controlling the opening and closing of the valve, the rotation of the crankshaft and the up and down movement of the piston.

[Pacific Automobile Network] If the car is not timing, there will be unstable idling, weak acceleration, engine shaking, insufficient power, which will seriously cause the engine valve and piston to collide with each other, resulting in engine damage. The timing of the car will vary depending on the engine.

The introduction of the timing and wrong teeth of the car is as follows: The engine timing transmission device of the general car is a tooth-shaped belt transmission. If there is no regular maintenance and adjustment at ordinary times, the timing gear belt jump phenomenon will occur, resulting in abnormal noise from the engine, poor acceleration, weak refueling and other symptoms.

The car is not timing, and its main faults are as follows: 1: Slight (small deviation) will cause the car to be weak and unable to refuel uphill. 2: If it is more serious, there is no idling, or the engine shakes seriously in the idling state, and the exhaust pipe makes a burst sound when refueling! And occasionally, accompanied by the sound of explosion, come on and die! ( At the same time, it also includes 1).

The symptoms of the car's timing is not good: early ignition or lag ignition will occur, unstable idle speed, weak acceleration, engine shaking and vibration, power reduction and other phenomena will occur.

How to judge that the timing chain should be changed

Use a spring scale to check the elongation of the chain at three or more positions. If it exceeds the service life, it should be replaced immediately.Use a vernier caliper to check the degree of wear of the camshaft and crankshaft sprockets. If the usage limit is exceeded, it should be replaced immediately.

Check the timing chain. Judging from the elongation, wear and breakage of the timing chain, if the timing chain is damaged, it needs to be replaced immediately. Listen to the sound while driving. When the car is running, if the engine often makes a gurgling sound, which is different from the usual noise, it means that the timing chain may be faulty and needs to be replaced. Fuel consumption increases.

How to judge whether the timing chain should be replaced? To determine whether the timing chain needs to be replaced, you can refer to the following methods: Measuring the spring: Measure the elongation of the spring. If it exceeds the length of use, it should be replaced.

The inspection method (judgment method) of timing chain failure is as follows: use a spring scale to check the elongation of the chain in three or more places.If it exceeds the service life, it should be replaced immediately; check the degree of wear of the car camshaft and crankshaft sprocket with a vernier caliper.

The following are some indicators to determine whether the timing chain needs to be replaced: Sound: If the timing chain is worn or loose, it may make a "quack" or "giggle" sound. If you hear such a sound when the engine starts or is running, it is likely that the timing chain is damaged or loose and needs to be replaced in time.

Or. The method of Pacific Automobile Network to judge whether the timing belt needs to be replaced 1 Check the appearance of the belt. If there is a cracked hard skin and a bare line, it needs to be replaced. 2 When touching the upper and lower sides of the timing belt with your hand, you feel that the surface of the timing belt is relatively rough and hairy, it means that the timing belt has generally aged.