Real-time customs tariff analysis

List of the catalogue of this article:

• 1,Real-time customs tariff analysis Where is the high-pressure common-rail electric injection engine shut-off solenoid valve
• 2, Weichai's six-cylinder electric injection high-pressure common rail engine suddenly turned off. When the engine is turned off, it can catch fire...
• 3, oil supply system of high-pressure common rail electric injection engine
• 4, How to understand electric injection diesel engine Composition of motivation
• 5, The high-pressure common-rail electric injection diesel engine can't start and needs to start overflow to ignite. What should it do_Baidu...

Where is the high-pressure common-rail electric injection engine shutdown solenoid valve

1. The solenoid valve of the machine is on the large pump of diesel, because the key of the diesel vehicle immediately stops the fuel supply and turns off the engine. Only by controlling the large pump can this effect be achieved. Otherwise, the oil will not be cut off immediately, which will cause fire and threaten personal safety.

2. On the left. The solenoid valve of the large truck is located in the engine compartment, near one side of the engine. Under normal circumstances, the solenoid valve of the large truck is on the left.

3. The jb1 diesel engine extinguishing solenoid valve is next to the oil outlet valve coupling of the high-pressure injection pump, that is, the high-pressure oil pipe. The accessory with a wire connected to the ignition key is.

4. The START gear or Y gear (preheating gear) of the "yellow line" connection switch.

5. It may also be that the high-pressure oil pump solenoid valve is out of order. After the failure, the idle speed can be turned off; when the switch is good, there is no problem with the line but it still can't be ignited, it means that the high-pressure oil pump solenoid valve is out of order to check the high-pressure oil pump solenoid valve. The reason is that the lubrication of the rubbing surface is not timely.

6, bigThe solenoid valve connected to the high-pressure oil pump of the Zhong 4t engine is called the fuel metering proportional solenoid valve (high-pressure common rail). The fuel metering proportional solenoid valve is installed in the oil inlet position of the high-pressure oil pump to adjust the fuel supply and fuel pressure value, and its adjustment requirements are controlled by the ECU.

Weichai's six-cylinder electric injection high-pressure common rail engine suddenly turned off. When the engine is turned off, it can catch fire...

Reason: The temperature is not enough. Due to the engine temperature is not enough, the mixture of fuel and air sprayed into the cylinder cannot be burned, and the exhaust pipe has white smoke. Therefore, after the locomotive starts, you should pay attention to the insulation of the water tank and use the middle throttle to operate, so that when the temperature of the locomotive reaches more than 50 degrees, the load should be gradually increased.

Insufficient cylinder pressure. Due to the wear and airtightness of the cylinder barrel and piston (ring), the compression ratio does not reach the standard. New cars generally do not have this failure of more than 200,000 kilometers or pollution in the intake system may cause premature grinding.

There are several reasons: the fuel injector fails, the fuel atomization effect is not good, and the car does not reach the fire limit, so the engine is turned off. The throttlum valve accumulates carbon, resulting in insufficient air intake and shutdown. There is a problem with the fuel system. The fuel combustion is insufficient, the spark plug is difficult to ignite the mixture, and the car is turned off.

The oil supply system of high-pressure common rail electric injection engine

1. The oil supply system accurately controls the low-pressure oil pump to suck the diesel out of the fuel tank and provide it to the high pressure through filtration.Oil pump, there is a solenoid valve in the low-pressure pump to control the fuel to reach the high-pressure pump chamber, and the fuel enters the tubular accumulator - the fuel track.

2. High-pressure common rail electric injection technology refers to an oil supply method that completely separates the generation of injection pressure and the injection process in a closed-loop system composed of high-pressure oil pumps, pressure sensors and electronic control units (ECUs).

3. Camshaft speed sensor, crankshaft speed sensor, throttle position sensor (electronic throttle), fuel temperature sensor, oil pressure sensor, oil supply pump, ECU (electronic control unit) electronically controlled fuel injector, common rail pipe, common rail pressure sensor.

4. Hello! The high-pressure common rail fuel injection system is composed of an electronic control unit, various sensors and actuators. Sensors include hydraulic pressure sensors, air flow sensors, accelerator pedal position sensors, etc.The actuators include fuel pressure regulating solenoid valves, fuel injectors, etc.

How to understand the composition of electric injection diesel engine

1. Electronic monomer pumps mainly include high-pressure oil pumps, mechanical fuel injectors, fuel pipelines and filtration systems controlled by oil transmission control valves (solenoid valves).The fuel injection pump of the electronic monomer pump system is driven by the camshaft of the gas distribution mechanism, which can minimize the structure and reduce the distance from the outlet of the fuel injection pump to the injector.

2. The injection system of an electric injection diesel engine consists of three parts: sensor, ECU (computer) and actuator. Its task is to carry out electronic control of the fuel injection system and realize real-time control of the fuel injection volume and fuel injection timing with operating conditions.

3. Usually, an electric injection engine consists of three systems: air supply system, fuel supply system and electronic control system.

4. The electric injection engine is composed of the following systems: the oil supply system is mainly composed of an oil pressure regulator, an injector and an injector pump. The fuel pump is installed in the fuel tank, and the turbine pump is driven by a motor. When the oil pressure in the pump exceeds a certain value, the one-way valve of the fuel top opens to supply oil to the oil road.

5. Body: It is the skeleton of a diesel engine, which supports and installs other parts, including: cylinder block, cylinder liner, cylinder head, cylinder pad, oil pan shell, flywheel shell, timing gear shell, front and rear feet.

6. The main mechanism components of diesel engines generally include: fuselage, crank connecting rod mechanism, gas distribution mechanism, fuel system, lubrication system, cooling system, electrical system.

The high-voltage common-rail electric injection diesel engine can't catch fire. It needs to start and overflow to catch fire. What should it do? Baidu...

1. Ignition system failure The function of the car ignition system is to provide high-voltage electricity to the spark plug regularly to ensure the normal operation of the car.If the car can't hit the car and the reason for the battery is ruled out, it is very likely that the ignition system of the car is faulty.

2. The reasons are as follows: First, the vehicle is in the low-temperature zone and needs to be ignited many times to preheat the cylinder block. Second, the vehicle's electric injection system fails, and the fuel cannot be sprayed into the cylinder. Third, the starter of the vehicle is damaged, and the vehicle cannot start normally. Because diesel engines have strict requirements for the environment when working. Therefore, in winter, it is easy to have problems.

3. Electric injection diesel engine The solution to the problem that the electric injection diesel engine cannot be ignited: observe whether the circuit switch is back in place and whether the fault light is on after the switch or line fails. The switch problem is often not paid attention to, and you should check it first when you get on the car. It may also be that the solenoid valve of the high-pressure oil pump is out of order. After the failure, the idle gear can be turned off by increasing the speed.