CN201908717U - Turbocharger with electronic control mechanical valve - Google Patents

Abstract

A turbocharger with an electronically controlled mechanical valve, which includes a compressor and an electrically controlled mechanical valve, a valve body cavity, a first exhaust passage, and a second exhaust passage are added in the volute of the compressor, the first One exhaust channel communicates with the flow channel and the valve body cavity, and the second exhaust channel communicates with the valve body cavity and the inlet of the compressor. A circular boss is provided at the junction of the first exhaust channel and the valve body cavity, and an electric control mechanical valve installation hole is provided on the compressor volute, and the installation hole of the electric control mechanical valve communicates with the valve body cavity. The electronically controlled mechanical valve is installed in the electronically controlled mechanical valve installation hole on the volute of the compressor, and the end face of the upper casing with a sealing ring on the electrically controlled mechanical valve is pressed against the circular boss at the junction of the first exhaust passage and the valve body cavity end face.

Description

Turbocharger with electronically controlled mechanical valve

technical field

The utility model belongs to the technical field of engine turbochargers, in particular to a turbocharger with an electronically controlled mechanical valve.

Background technique

When a supercharged engine with a throttle valve, especially a gasoline engine using supercharging technology, is working, when the accelerator pedal is suddenly released, a near-closed gap will suddenly form between the outlet of the turbocharger compressor and the throttle valve. However, due to the effect of rotational inertia, the impeller in the compressor still inputs the compressed air into the closed volume, causing the outlet pressure of the compressor to rise, and the reduction of the air flow rate can easily cause the turbocharger to surge. The existing turbocharger compressor volute is shown in Figure 3. The current solution is to use a mechanical pressure relief valve integrated on the compressor volute to control the return of compressed air to avoid excessive compressed air entering The intake pipe causes the supercharger to surge.

The existing mechanical pressure relief valve is a diaphragm valve, as shown in Figure 4, the mechanical pressure relief valve 3 is generally integrated and installed on the compressor volute 1, and the air is directly taken after the throttle valve. The mechanical control method is through Differential pressure control, its set value is a fixed value, in the process of use, there are the following problems:

1. When the engine decelerates rapidly at medium and high-speed operating points, the throttle valve is closed, and the opening of the mechanical pressure relief valve 3 is from slightly opened to fully opened. The opening process is not fast, and exhaust noise will be generated when the valve is slightly opened.

2. When the engine speeds up after rapid deceleration, due to the delayed response of the mechanical pressure relief valve, the valve cannot be closed in time, causing the compressor characteristics of the turbocharger to be unable to recover in time, and the instantaneous response is poor. Acceleration performance and comfort are reduced.

3. The pressure setting of a type of mechanical pressure relief valve is a fixed value, which has limitations for different engine models.

Contents of the invention

The purpose of this utility model is to provide a turbocharger with an electronically controlled mechanical valve to overcome the above-mentioned shortcomings of the prior art.

The technical scheme of the utility model is: a turbocharger with an electronically controlled mechanical valve, which includes a compressor and an electrically controlled mechanical valve, and a valve body cavity, a first exhaust passage, A second exhaust channel, the first exhaust channel communicates with the flow channel and the valve body cavity, and the second exhaust channel communicates with the valve body cavity and the compressor inlet. A round boss is provided at the junction of the first exhaust channel and the valve body cavity, and an electric control mechanical valve installation hole is provided on the compressor volute, and the installation hole of the electric control mechanical valve communicates with the valve body cavity. The electronically controlled mechanical valve is installed in the electronically controlled mechanical valve installation hole on the volute of the compressor, and the end face of the upper casing with a sealing ring on the electrically controlled mechanical valve is pressed against the circular boss at the junction of the first exhaust passage and the valve body cavity end face.

Compared with the prior art, the utility model has the following characteristics:

The turbocharger with electronically controlled mechanical valve provided by the utility model adds an exhaust channel on the compressor volute, integrates the electronically controlled mechanical valve on the compressor volute, and adopts an electronic control method to connect with the ECU , Control the opening and closing of the exhaust passage through the on/off valve.

1. When the gasoline supercharged engine is working normally, the electronically controlled mechanical valve is closed, and the air flow only circulates inside the compressor flow channel; when the gasoline supercharged engine is in the working state of rapid deceleration, the ECU will The speed signal (or the intake pressure sensing signal of the engine intake manifold) quickly opens the electronically controlled mechanical valve, so that a part of the compressed air flows from the exhaust passage to the compressor inlet, so as to achieve the return flow of compressed air and avoid excessive The compressed air enters the intake pipe to cause the supercharger to surge, because there is no micro-opening process in the opening process of the electronically controlled mechanical valve, which solves the generation of exhaust noise.

2. When the engine speeds up after rapid deceleration, the ECU quickly closes the electronically controlled mechanical valve according to the speed signal transmitted by the accelerator pedal displacement sensor (or the intake pressure sensor signal of the engine intake manifold), so that the characteristics of the compressor can be restored in time , does not affect the transient response of the turbocharger, ensuring the speed-up performance and comfort of the vehicle.

3. One type of electronically controlled mechanical valve can be used on multiple types of turbochargers, covering multiple engine types, with simple structure and reliable control.

The detailed structure of the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Accompanying drawing 1 is the structural representation of the turbocharger with electronically controlled mechanical valve provided by the utility model;

Accompanying drawing 2 is the schematic structural diagram of the turbocharger that does not install the electric control mechanical valve in accompanying drawing 1;

Accompanying drawing 3 is the structural representation of existing turbocharger compressor volute;

Accompanying drawing 4 is the structural schematic diagram of the existing mechanical relief valve installed on the volute of the compressor.

Detailed ways

A turbocharger with an electronically controlled mechanical valve, which includes a compressor and an electrically controlled mechanical valve, a valve body chamber 1-6, a first exhaust passage 1-3, a The second exhaust channel 1-5, the first exhaust channel 1-3 communicates with the flow channel 1-1 and the valve body cavity 1-6, the second exhaust channel 1-5 communicates with the valve body cavity 1-6 and the compressor inlet 1 -2 interlinked. A round boss 1-4 is provided at the junction of the first exhaust passage 1-3 and the valve body cavity 1-6, and an electronically controlled mechanical valve installation hole 1-7 is provided on the compressor volute 1. The mechanical valve mounting holes 1-7 communicate with the valve body cavity 1-6. The electronically controlled mechanical valve 2 is installed in the electronically controlled mechanical valve installation hole 1-7 on the compressor volute 1, and the end face of the upper casing 2-2 with a sealing ring on the electrically controlled mechanical valve 2 is pressed against the first exhaust passage 1-3 and the end face of the round boss 1-4 of the junction of the valve body cavity 1-6.

When the gasoline supercharged engine is working normally, the piston 2-1 of the electronically controlled mechanical valve 2 is in a closed state, and the piston 2-1 of the electrically controlled mechanical valve 2 protrudes forward to close the first exhaust passage 1-3 , all the compressed air compressed by the compressor enters the engine cylinder, and the compressor characteristics of the turbocharger do not change.

When the turbocharged gasoline engine is in the state of rapid deceleration, the throttle valve is closed, and an approximately closed volume will suddenly form between the outlet of the turbocharger compressor and the throttle valve, and the pressure at the outlet of the compressor continues to rise. The speed signal transmitted by the displacement sensor (or the intake pressure sensing signal of the engine intake manifold) quickly sends an opening signal to the electronically controlled mechanical valve 2, so that the piston 2-1 of the electronically controlled mechanical valve 2 retreats backward, and the electronically controlled The mechanical valve 2 is opened, and the excess gas flows from the first exhaust channel 1-3→the exhaust hole 2-3 on the casing 2-2 of the electronically controlled mechanical valve 2→the valve body cavity 1-6→the second exhaust channel 1-5 discharge.

When the engine speeds up after rapid deceleration and returns to normal operation, the ECU will send an electric signal to the electronically controlled mechanical valve 2 in time according to the speed signal transmitted by the accelerator pedal displacement sensor (or the intake pressure sensor signal of the engine intake manifold), so that The piston 2-1 of the electronically controlled mechanical valve 2 stretches forward in quick response, and closes the first exhaust passage 1-3.

Claims (1)

1. turbosupercharger that has electrically operable mechanical valve, it is characterized in that: it comprises gas compressor and electrically operable mechanical valve, in the gas compressor volute, set up a valve body chamber, first exhaust passage, second exhaust passage, first exhaust passage communicates with runner and valve body chamber, and second exhaust passage communicates with valve body chamber and compressor inlet; Be provided with a boss platform in the connecting part in first exhaust passage and valve body chamber, be provided with an electrically operable mechanical valve mounting hole on the gas compressor volute, the electrically operable mechanical valve mounting hole communicates with the valve body chamber; Electrically operable mechanical valve is installed in the electrically operable mechanical valve mounting hole on the gas compressor volute, and the upper shell end face that has seal ring on the electrically operable mechanical valve is pressed on the boss you face of first exhaust passage and connecting part, valve body chamber.

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