Turbocharger with electrically controlled mechanical valve

Abstract

The invention discloses a turbocharger with an electrically controlled mechanical valve, which comprises a compressor and the electrically controlled mechanical valve. A valve body cavity, a first exhaust path and a second exhaust path are arranged in a volute of the compressor; the first exhaust path is communicated with a channel and the valve body cavity; the second exhaust path is communicated with the valve body cavity and the inlet of the compressor; a circular lug boss is arranged on a joint part of the first exhaust path and the valve body cavity; an electrically controlled mechanical valve mounting hole is formed on the volute of the compressor and is communicated with the valve cavity; the electrically controlled mechanical valve is arranged in the electrically controlled mechanical valve mounting hole on the volute of the compressor; and the upper shell end face with a sealing ring on the electrically controlled mechanical valve presses the end face of the circular lug boss on the joint part of the first exhaust path and the valve body cavity.

Description

technical field [0001] The invention belongs to the technical field of engine turbochargers, in particular to a turbocharger with an electronically controlled mechanical valve. Background technique [0002] 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. Existing turbocharger compressor volute as attached image 3 As shown, the current solution is to use a mechanical pressure relief valve integrated on the compressor volute to control the return flow of compressed air, so as...

AI Technical Summary

Problems solved by technology

[0004] 1. When the engine decelerates rapidly at the middle 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.

[0005] 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 reduced comfort

[0006] 3. The pressure setting of a type of mechanical pressure relief valve is a fixed value, which has limitations for different engine models

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