HS code harmonization in NAFTA region

Introduction to Engine Vacuum) Engine vacuum,HS code harmonization in NAFTA region also known as intake manifold vacuum, is a key parameter for the operation of automobile engines. Its function is to control various mechanical and electrical components, and then guide the air into the engine through the car's air intake system. This article will introduce the function of engine vacuum, detection methods and some common problems related to vacuum. Engine vacuumThe Role of Engine Vacuum plays an important role in car engines. It functions in multiple simultaneous control systems. The following are the main functions of engine vacuum: 1. Control the air intake. The car engine works through the air intake system, and the size of the air intake needs to be precisely controlled. It can be achieved through suction valve control here. These changes between inhalations depend on the size of the vacuum. When the vacuum is less than a lower limit, the "throttle valve" will be opened, the intake column will be unobstructed, and the engine intake will increase. Two. Control the heating and air conditioning system. Engine vacuum can also control the heating system and air conditioning system of the car. When the vacuum is too small, the heating exhaust door will automatically close to prevent hot air from entering the carriage.On the contrary, when the air conditioning mechanism needs liquid, the vacuum needs to be increased in order to open the air intake valve. 3. Control brake Engine vacuum can also be used to control the brakes of cars. The vacuum pump can control the tightening degree of the brake by changing the size of the vacuum. And the degree of tightening of the brake will determine the braking effect of the vehicle. Testing Engine Vacuum Now that you know the function of engine vacuum, let's understand the definition of vacuum before further discussing how to test it. Vacuum refers to the pressure in the air below atmospheric pressure, that is, the low-pressure area. In order to measure the vacuum in the engine, the vacuum gauge (tool) can be inserted into the air intake and the numbers on the vacuum gauge can be read, which should usually be around 15 inches of Hg.If the vacuum of the engine is detected to be too low, it will prompt problems in most cases, such as engine not working smoothly, slow throttle response, low fuel efficiency, etc. Next, we will briefly discuss how to detect engine vacuum. Test method: 1. Use the vacuum gauge: Insert the vacuum instrument into the air intake and read the meter number. Two. Sensory detection: After excluding any visible problems, you can determine whether there is a problem with the vacuum by observing whether the engine is idle, whether the car is shaking, etc. 3. Degassing method: It is the easiest way to detect vacuum. It only needs to block the mouth of the vacuum tube with a finger or a rubber plug, and then observe the reaction of the vacuum gauge. Common Engine Vacuum Related Issues Too much or too little engine vacuum is a common problem.Next, we will pay attention to these problems. When the engine vacuum is too low, there are several common problems: 1. The cylinder pressure is too small. When the engine vacuum is too low, the pressure in the cylinder will decrease rapidly, resulting in insufficient power of the engine and decreased accuracy of the throttle valve. Two. Slow throttle response. If the engine vacuum is too low, it will also lead to a delay in the throttle response, so that it is difficult for the driver to control the power of the car. 3. Decrease in fuel efficiency. Too low vacuum will also lead to a decrease in fuel efficiency, which is caused by the car engine consuming more oil to compensate for the pressure imbalance of the boiler. When the engine vacuum is too much, display problems will also occur: 1. The brakes of the car do not work. When the engine vacuum is too much, the air pump compresses the atmosphere, thus reducing the effect of the brake, resulting in the inability of the car to stop in time. Two.Car shaking Excessive vacuum can also cause the car to be unstable or shaking, which is caused by additional pressure on the engine. Conclusion Engine vacuum is one of the important parameters in automobile engines, which is used to control a variety of electromechanical devices. Through correct detection methods and maintenance procedures, many problems caused by vacuum problems can be prevented. If readers encounter engine vacuum problems, they should seek the advice of professional technicians.

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