Mixer truck hydraulic oil tank temperature sensor

1. Throttle position sensor.

Function: The throttle position sensor is to monitor the size of the throttle opening angle, determine the idle speed, full load and acceleration and deceleration conditions, and implement the throttle opening state.

Corresponding various injection volume control. Failure effects: Idle speed fluctuates high and low, or causes the phenomenon of speeding.

2. Intake valve pressure sensor.

Function: The intake pressure sensor is to provide engine load information, i.e. through.

In the case of pressure measurement on the air intake pipe, the air intake into the engine is indirectly measured, and then the air intake volume is converted into an electrical signal and provided to the computer through the internal circuit. Failure effect: causing the engine to be difficult to start, or idle unstable.

3. Inlet air temperature sensor.

Purpose: Provides air temperature information for correction of fuel injection and ignition timing. Failure effect: low idle speed, easy to stall.

4. Crankshaft angle sensor.

Function: It is to provide speed and crankshaft phase information, and provide reference points for fuel injection timing and ignition timing. Failure effects: The engine cannot be started or the engine suddenly stalls after starting.

5. Coolant temperature sensor.

Function: It monitors the engine coolant temperature and converts it into a voltage signal to the computer, and the ECU controls the amount of fuel injection, ignition timing and idle speed according to this signal. Effect of failure: low idle speed.

6. Oxygen sensor.

Function: It is the main component that provides mixer concentration information, is used to correct the fuel injection volume, realizes the closed-loop control of the air-fuel ratio, and ensures that the actual air-fuel ratio of the engine is close to the theoretical air-fuel ratio. Failure effects: unstable idle speed, excessive consumption.

7. Knock sensor.

Function: It is to provide detonation information, which is used to correct the ignition timing and real-detonation closed-loop control. Failure effect: When the detonation is about to occur, the detonation signal cannot be provided, and the computer cannot receive the signal "peak" and cannot reduce the ignition advance angle, and the detonation occurs.

8. Three-way catalytic converter.

Function: The three-way catalytic converter is installed in front of the muffler in the exhaust pipe, which can reduce the content of three pollutants in the exhaust gas (carbon monoxide CO, unburned carbon oxide HC and oxide NOX) at the same time, when the air-fuel ratio of the engine is close to the theoretical air-fuel ratio, the three-way catalytic converter has the highest conversion efficiency, when the high temperature of 300 800 harmful gases undergoes oxidation and reduction reaction through the precious catalysis attached to the ceramic monomer through the three-way catalytic converter center, and is converted into harmless gas. Failure Impact:

The exhaust gas discharged is not up to standard.

The hydraulic oil temperature control switch is based on the temperature of the hydraulic oil to control whether the cooling fan is working. Once out of order, the hydraulic fan will not work, causing the hydraulic oil temperature to be too high. It is easy to damage the hydraulic system.

It is used to detect automatic transmissions.

The temperature of the hydraulic oil is used as the basis for shift control, oil pressure control and lock-up clutch control by the automatic transmission control unit.

In addition, various switching signals, such as neutral, are included.

Start switch signal, forced downshift switch signal, driving mode switch signal, etc.

It is used to detect the temperature of hydraulic oil, and transmit the oil temperature signal to the control system to realize the monitoring of oil temperature.

EFI Shaanxi Delong mixer truck F3000 ambient temperature sensor in**, you can only open the electrical installation diagram of your car to see, where it is. Because there are many types and models of sensors, and the sensors have contact type and non-contact type, as for the contact type, it is good to say, it is generally installed near the controlled object, but if it is a non-contact type, it is not necessarily installed near the controlled object, so you can only view the sensor you need according to the electrical installation drawing.

The hydraulic system is the most important core system of the excavator, and the problem of the hydraulic system will directly affect the operating performance of the excavator or even fail to operate. Among them, hydraulic oil overheating is a common failure of hydraulic systems, but it is often overlooked because hydraulic oil overheating sometimes has no obvious symptoms.

Potential hazards: 1) The hydraulic system is composed of a series of precision parts, when the temperature of the hydraulic oil is too high, the precision components in the hydraulic system are at a high temperature for a long time, and a certain deformation will occur. Due to the different materials of different components, their thermal expansion coefficients are also different, and the different deformation amplitudes will make the fitting tolerances between the components exceed the reasonable range, which will affect the transmission accuracy of the system, resulting in the obstruction of the movement of the valve body and the leakage of hydraulic oil.

2) The viscosity of hydraulic oil with too high temperature will be reduced, and its lubrication performance will be reduced, resulting in abnormal wear of hydraulic components, affecting the life of components, and aggravating oil leakage.

3) Excessive oil temperature will cause cavitation, produce additional noise and vibration, and will also corrode the surface of metal components, affecting the life of components and the performance of hydraulic systems.

4) Excessive temperature will also accelerate the deterioration of hydraulic oil, reduce the service life of hydraulic oil, and corrode hydraulic components.

Solution: 1) Continuous operation in a high temperature environment should be avoided as much as possible, especially high-intensity operation. The high temperature environment will affect the heat dissipation effect of the hydraulic system, and the heat generated by the machine is greater than the heat dissipation, so that the oil temperature is too high.

2) Check the height of the hydraulic oil level frequently, and replenish the hydraulic oil in time. The oil level is too low, the hydraulic oil does not have sufficient circulation and cooling conditions, and the heat dissipation capacity is greatly reduced.

3) Regularly replace the appropriate grade of hydraulic oil according to the manual, and replace the hydraulic oil filter element. After long-term use, the viscosity of hydraulic oil decreases, and the oil fails, and if it is not replaced in time, it will affect the normal operation of the system. In addition, it is not possible to mix fluids of different grades.

4) Keep the hydraulic oil clean. Hydraulic oil contamination accelerates the wear of internal parts or seals of hydraulic components and damages the hydraulic system. When replacing the hydraulic oil, attention should be paid to cleaning to avoid water and debris entering the hydraulic system.

Continued high temperatures of hydraulic oil can cause leakage of the seals of hydraulic pumps and motors, and can also make the tank sluggish.

The mixer truck presses the refrigerator when it is parked, and the fan is working all the time, which may be the automatic operation of the fan.

Although he has been shut down, he still has to maintain it.

Because the prompt state has been working for reasons, then you must let him connect to it.