What is the solution to the high turbocharging of Haval h6?

Remove the intake pipe from the throttle, start the engine, and block the throttle by hand (don't use anything else to prevent it from being sucked in). If the engine shuts down instantly, check back from the intake pipe and find the intake filter element. If the flameout is not stopped by hand, clamp two small tubes on the air branch pipe with pliers, usually the lower tube (don't take away the hand blocking the throttle). If the flameout stops, it means that the check valve from the exhaust pipe to the intake branch pipe is broken. Replace the check valve and clear the fault.

Engine boost pressure control involves the following parameters: intake temperature, engine speed, throttle position, atmospheric pressure, intake pipe pressure and pre-throttle pressure. DME control module controls the electro-pneumatic pressure transducer (EPDW) according to these parameters. EPDW is used to control the vacuum actuator, which is the key to open and close the wastegate valve. When the wastegate valve is closed, the exhaust gas will enter the turbocharger for turbocharging. When the wastegate valve is opened, the exhaust gas will enter the exhaust pipe and be discharged from the vehicle.

In order to adapt the supercharged gasoline engine to work in a wide speed range and avoid knocking, it is generally necessary to control the supercharged pressure. Common control methods are as follows.

1. By-pass bleeder valve is adopted.

The exhaust valve includes an intake exhaust valve and an exhaust exhaust exhaust valve. Generally speaking, air intake and exhaust are for pre-pressurization scheme. If the post-turbocharging arrangement scheme is adopted, the air-oil mixture will be discharged. At this time, the oil-gas mixture should be led back to the compressor to form circulating exhaust. According to the engine working conditions, the electronic control unit determines the boost pressure from the pre-stored boost pressure map, and then controls the exhaust bypass flow by controlling the opening time of the bypass valve, thus adjusting the boost pressure.

2. Compressor inlet throttle device

That is, a throttle valve is installed at the inlet of the compressor to appropriately reduce the inlet pressure of the compressor, so that the pressure at the outlet of the compressor will be reduced accordingly.

3. Variable geometry turbocharger, namely variable cross-section turbine and variable cross-section compressor, is adopted.

(Photo/Text/Photo: Pacific Auto Network Liang Kexin)