What is the fault of the new Santana throttle valve break

When the oil outlet chamber is reversed (it plays the role of a check valve after connection), the flow rate through the valve will not change after adjusting the adjustment handwheel. The main reason for the failure of flow regulation is that the valve core is radially stuck, when the valve core is radially stuck in the fully closed position, there is no flow in the oil outlet cavity after adjusting the adjustment handwheel; The valve core is radially stuck after adjusting the opening in the fully open position or at the throttle, and the flow rate of the oil outlet cavity of the adjustment handwheel does not change. When the temperature of the oil flowing through the throttle valve changes, the viscosity of the oil will change, which will also cause the flow rate to be unstable; When the load changes, the pressure changes, which will change the oil hydraulic difference between the front and rear of the throttle valve, in fact, it is the same as the throttle, when you step on the throttle, the throttle valve will open, and the deeper you step on.

Measures to prevent flow instability, in addition to the use of the method to prevent the throttle valve from clogging, so that the flow area of the throttle is changed, thereby causing the flow change, the larger the opening, the more air intake, the electronic control unit calculates the required fuel injection amount according to the air intake, so as to ensure that the engine has sufficient power output.

Second, the common faults of the throttle valve and the elimination method.

1) Failure of flow regulation.

The phenomenon of flow regulation failure refers to the fact that the flow rate of the oil outlet chamber does not change after adjusting the adjustment handwheel (this phenomenon is not present in the simple throttle valve).

2) Unstable traffic.

Throttle valves and one-way throttle valvesWhen the throttle is adjusted and locked, the flow is sometimes unstable, and it will also cause the flow to be unstable. After the throttle port is adjusted and locked, it will cause an increase in leakage, and sometimes it will also affect the minimum stable flow rate, and there must be leakage at the use of gap seal fit.

First, the function of the throttle valve, especially when the minimum stable flow rate is more likely to occur. The main causes of unstable flow are loose locking device, partial blockage of the throttle, increase in oil temperature, loosening of the locking device due to mechanical vibration or other reasons. After the valve core is radially stuck, it should be cleaned to remove dirt

The function is to control the inlet air flow. Impurities in the oil accumulate and adhere to the edge of the throttle, reducing the flow area and causing a decrease in flow. When the pressure oil flushes out the impurities, the orifice is restored to the original flow area.

When the sealing surface is worn too much. When the one-way throttle valve enters, the flow rate also returns to the original value, so the throttle valve or the one-way throttle valve can not be used as a globe valve, and the load pressure changes, etc., so the flow rate is unstable, tighten the locking device and try to make the load pressure not change, or less change.

c) Increased internal leakage.

When the throttle port of the throttle valve or one-way flow valve is closed, it can also be used to strengthen the oil temperature control, and the valve core should be replaced.

First, the working principle of the throttle valve:

1) The throttle valve is the main component of the automobile air conditioning and refrigeration system, which is installed at the inlet of the evaporator and is the dividing point between the high and low pressure of the automobile air conditioning and refrigeration system.

2) Its function is to throttle and decompress the high-pressure liquid refrigerant from the liquid storage dryer, regulate and control the liquid refrigeration dose entering the evaporator, so that it can adapt to the change of refrigeration load, and at the same time can prevent the liquid shock phenomenon of the compressor (that is, the unevaporated liquid refrigerant is compressed after entering the compressor, which is easy to cause damage to the compressor valve) and the vapor at the outlet of the evaporator is abnormally overheated.

3) The temperature-sensing expansion valve used in the automobile air-conditioning refrigeration system, also known as the thermodynamic expansion valve, is to use the temperature sensing package installed at the outlet of the evaporator to sense the superheat of the refrigerant vapor (superheat refers to the value that the actual temperature of the vapor is higher than the evaporation temperature), so as to adjust the size of the expansion valve opening, so as to control the flow of liquid refrigerant entering the evaporator. When the temperature of the evaporator outlet decreases, the volume of liquid in the chamber of the chamber, capillary tube and membrane shrinks, and the valve port of the expansion valve is closed, thereby restricting the refrigerant from entering the evaporator. Opposite.

If the evaporator outlet temperature rises, the expansion valve grating will open. This increases the refrigerant flow. Principle:

2. Analysis of the causes and solutions of common throttle valve short circuits

1) Flow regulation failure: The flow regulation failure phenomenon refers to the fact that the flow rate of the oil outlet cavity does not change after adjusting the adjustment handwheel (there is no such phenomenon in the simple throttle valve). The main reason for the failure of flow regulation is that the valve core is radially stuck, when the valve core is radially stuck in the fully closed position, there is no flow in the oil outlet cavity after adjusting the adjustment handwheel; The valve core is radially stuck after adjusting the opening in the fully open position or at the throttle, and the flow rate of the oil outlet cavity of the adjustment handwheel does not change.

After the valve core is radially stuck, it should be cleaned to remove dirtWhen the inlet and outlet chambers of the one-way throttle valve are reversed (after connecting to play the role of a one-way valve), the flow rate through the valve will not change after adjusting the adjustment handwheel.

2) Unstable flow: When the throttle port of the throttle valve and the one-way throttle valve is adjusted and locked, the flow is sometimes unstable, especially when the minimum stable flow rate is more likely to occur. The main causes of flow instability are loose locking devices, partial blockage of the throttle, increased oil temperature, and changes in load pressure.

After the throttle is adjusted and locked, the locking device will be loosened due to mechanical vibration or other reasons, which will change the overflow area of the throttle, thereby causing a change in flow.

The Santana throttle valve is caused by an open circuit fault in the throttle position sensor and the signal cannot be detected.

1. The impact of Santana throttle valve circuit opening is great, and the main effects are:

1) The throttle cannot detect the signal;

2) The throttle valve cannot be opened, resulting in the car not being able to open;

3) Cause the vehicle to idle unstable;

2. The main reasons for the throttle valve to break the circuit are as follows:

1) The throttle position sensor is disconnected;

2) The throttle idle motor does not work;

3) The sensor circuit is aging and there is an open circuit;

3. The solution to the broken circuit of the throttle valve is as follows:

1) If it is a failure caused by a broken fuse, only need to replace the fuse of the throttle valve;

2) If the idle motor does not work, it can be repaired, and it can be repaired, and it cannot be repaired, and it will be replaced directly;

3) If the line is aging and there is an open circuit, the wiring harness can be replaced.

Summary: The throttle valve circuit has a great impact on the normal operation of the engine, so the daily maintenance and maintenance may maintain the good performance and service life of the various parts of the vehicle, and also maintain good usage habits.

Are you waiting for a red light or something to turn off?

It is likely that the throttle valve is dirty, and the air intake may also be dirty.

It is recommended to clean the throttle valve body, air intake, air filter, and clean up the carbon deposits with a hanging bottle for the car.