HS code-driven portfolio diversification

List of the table of contents of this article:

• 1,HS code-driven portfolio diversification What does the dynamic engine support mean?
• 2, What should I do if the dynamic machine 600 engine fault light is on?
• 3, The car engine dynamically tests the power. Why is there a big fan in front of the car?
• 4, What are the items of dynamic inspection of the engine? How to check the movement of the engine through the vacuum degree of the intake branch pipe...
• 5, How to test the dynamic characteristics of the engine
• 6, Dynamic diagram of the principle of the engine

What does the dynamic engine support mean?

1. The engine support is the support used to support the engine, generally using spiral support, etc.

2. The fixed support of the car engine on the vehicle is called the engine bracket, also called the foot glue. Foot glue is a rubber buffer block connected between the engine and the frame, which plays the role of reducing the vibration of the engine to the cockpit.

3. Because the engine support is loose or damaged, the engine support is the connector between the engine and the car, they can ensure the safe connection of the motor.

4. What is the engine support: required. Generally speaking, the engine suspension system has the following requirements: 1. It can withstand dynamic and static loads under various working conditions, so that the displacement of the generator assembly in all directions is within an acceptable range without interfering with other parts on the chassis. At the same time, no parts were damaged before the engine overhaul.

What should I do if the dynamic machine 600 engine fault light is on?

1. Start and turn off the vehicle three times in a row. Turn off the ignition and pull out the negative pole of the engine battery, wait for 30 seconds to connect it, and then try to start. It can be eliminated after using the fault detector to troubleshoot at the 4S store.

2. The engine fault light is on and the car can't start. It may be caused by the failure of the fuel pump or ignition parts. It's better to call for help directly. The engine fault light is on, but there is no abnormality in driving. It may be a sensor failure. You can go to the nearby repair shop at medium and low speeds.

3. Let me tell you that the handling method when the engine fault light is on is as follows: Read the fault code: You can contact a professional car repair shop or use the car fault diagnosis to read the fault code to determine the specific cause of the fault.Check the engine: Check the engine for abnormal noise, vibration or strange smell.

The car engine dynamically tests the power. Why is there a big fan in front of the car?

1. The car engine has a loud blowing sound because there is a fan in the air intake of the car engine. Engine radiator, also known as engine water tank, is a key component of a water-cooled engine cooling system. Cooling the engine through forced water cycle is a heat exchange device to ensure the continuous operation of the engine within the normal temperature range.

2. This is the principle of the car cooling system. As for the fan you mentioned, at present, civilian vehicles are mainly electronically controlled fans, and the start-up of the fan is controlled by an electronic system.When the temperature sensor detects that the water temperature reaches a certain temperature, it will send instructions to the fan, so that the fan begins to run.

3. The function of the car engine fan is to increase the air flow and flow rate flowing through the radiator to improve the cooling intensity.

4. One is the cooling fan of the water tank, and the other is the cooling fan of the air conditioner. The car fan blows in the direction of the water tank, cooling the water tank and emitting the heat of the engine. If you can't blow in the direction of the engine, it will cause the engine temperature to rise. The fan is installed behind the radiator, coaxial with the pump.

5. There are two types of engine fans: one is a mechanical fan and the other is an electric fan. The function of dispersion is to suck the air in front of the radiator to the back of the radiator to improve the cooling effect of the radiator.

6. The significance of car fans is to effectively dissipate heat for car engines.The car fan manufacturer said that the fan blade is not working all the time. When the temperature of the engine rises to a certain temperature, the temperature sensor sends an alarm, and the fan will work automatically.

What are the items of dynamic inspection of the engine? How to check the movement of the engine through the vacuum degree of the intake branch pipe...

The vacuum degree of the engine intake manifold is related to the number of cylinders, speed, sealing performance, ignition performance, air-fuel ratio and throttle valve opening of the engine. If the vacuum value deviates from the normal value, it indicates that the engine has a related fault. Therefore, by detecting the vacuum of the intake pipe, various faults of the engine can be judged.

The real airspace of the engine intake manifold is related to the number of cylinders, rotation speed, sealing performance, ignition performance, mixed air-air fuel ratio, throttle valve opening, etc. If the vacuum value deviates from the normal value, it indicates that there is a related failure in the engine. Therefore, various engine faults can be judged by detecting the true airspace of the intake pipe.

The inspection items of the intake system are as follows: Inlet manifold switch valve failure: open the end cover of the intake manifold switch valve, press the hearing stick on the intake manifold switch valve, start the engine, and step on the accelerator pedal repeatedly. Volkswagen releases the accelerator pedal before the engine speed reaches 4000/min to hear whether the intake manifold switch valve can work properly.

Diagnosing the electric injection engine with a vacuum gauge is essentially to detect the vacuum degree of the engine intake pipe. Check the engine intake pipeWhen vacuuming, the vacuum gauge should be connected to the back door of the throttle valve. In the normal state, the gasoline engine should run without load according to the specified idle speed value. Remove the air filter and check the reading and indication status of the vacuum gauge.

How to test the dynamic characteristics of the engine

Basic method: When the engine is idle or idle, it suddenly opens the throttle at a certain speed to make the engine overcome its inertia and various internal operating resistance and accelerate, its addition The speed performance can directly reflect the power of the engine.

The methods of describing the dynamic characteristics of the test device from the time domain frequency domain and the complex domain are as follows: first, carry out the test of the time domain and frequency domain, and pay attention to the numerical changes when testing; observe the dynamic changes in the description test of the complex domain;Comprehensively, the dynamic characteristics can be summarized from the comprehensive changes of the time domain frequency domain and the plural domain.

First, test the key equipment of the engine. On the test bench, the performance of the engine is tested by controlling the loading device to apply load, changing the engine working state and changing the speed.

The Laplace transform of output and input respectively. Transfer function is one of the basic mathematical tools to describe the dynamic characteristics of linear systems. The main research methods of classical control theory - frequency response method and root trajectory method - are based on transfer function. Transfer function is one of the main tools for studying classical control theory.

Evaluate the idling stability and idling emissions of gasoline engines. 4 Power test. Evaluate the power and economy performance of the engine under full load. 5 Load characteristic test.Evaluate the economy of part of the engine load at the specified speed. 60,000 have characteristic tests.

Dynamic diagram of the principle of the engine

Intrain stroke diagram (1) As shown in Figure (1), the first step of the engine's work is the intake stroke, that is, to provide sufficient combustible mixed gas (or fresh air) into the cylinder. At the beginning of the intake stroke, the crankshaft rotates to drive the piston from the upper stop point to the lower stop point. At this time, the exhaust valve is closed and the intake valve is opened.

The working principle of engine 1. Intapt stroke When the intake valve opens and the exhaust valve closes, the piston moves from the upper stop to the lower stop. The volume of the cylinder above the piston increases, resulting in a vacuum degree, and the pressure in the cylinder drops below the intake pressure.

The working principle of automobile engines is mainly to convert chemical energy into mechanical energy.The reason why the engine has sufficient power is that it generates kinetic energy by burning the fuel in the cylinder, which makes the piston in the engine cylinder reciprocate, which is also a process of working cycle.

The working principle of the four-cylinder engine is as follows: the engine in the working stroke, the high-temperature and high-pressure gas pushes the piston down to work externally and converts internal energy into mechanical energy at the same time; the piston completes four strokes in the movement: intake stroke, compression stroke, combustion and work (expansion) stroke and exhaust stroke. .

The four-stroke gasoline engine completes a working cycle in the intake stroke, compressionstroke, workingstroke and exhauststroke. ( 2) The intake stroke piston is driven by the crankshaft and moves from the upper stop point to the lower stop point. At this time, the intake valve is open, the exhaust valve is closed, and the crankshaft rotates 180°.