Diaphragm type electronic control pressure release valve for turbocharger

Abstract

The invention discloses a diaphragm type electronic control pressure release valve for a turbocharger. In the valve, a movable iron core outer shaft sleeve, a coil winding frame with a coil winding and a guide seat are embedded on an upper shell through injection molding; two symmetrically-distributed pressure release holes are formed at the bottom end of a diaphragm pressure seat; the diaphragm pressure seat is embedded on a movable iron core through injection molding; a movable iron core inner shaft sleeve is pressed in the shaft hole of the movable iron core; the upper shell is sleeved on a lower shell; a static iron core is a round rod and is pressed in the shaft hole of the guide seat; a movable iron core is sleeved on the static iron core; two symmetrically-distributed air exhaust grooves are formed on an inner circle wall where the lower shell is contacted with the diaphragm pressure seat; two guide posts are arranged at the bottom end of the inner hole of the lower shell and are provided with a spring respectively; a diaphragm pressure pad is clamped on the hole wall of the diaphragm pressure seat; a baffle plate is arranged between an end face at the bottom of the inner hole of the diaphragm pressure seat and the outer end face of the diaphragm pressure pad to prevent air flow impact; the diaphragm pressure seat, the diaphragm pressure pad and the baffle plate are arranged on the guide posts of the lower shell through nuts; and the diaphragm pressure seat is in movable fit with a hole wall with the air exhaust grooves on the lower shell.

Description

technical field [0001] The invention relates to the technical field of engine turbochargers, in particular to an electronically controlled pressure relief valve used on a volute of an engine turbocharger compressor. Background technique [0002] A supercharged engine with a throttle, especially a gasoline engine that uses supercharging technology to work, when the accelerator pedal is suddenly released, a near-closed gap will suddenly form between the outlet of the turbocharger compressor and the throttle. Volume, while the impeller in the compressor still sends compressed air into the intake pipe due to the effect of rotational inertia. At this time, the outlet pressure of the compressor rises and the air flow decreases, which easily causes the turbocharger to surge. The current solution is to use a pressure relief valve installed on the volute of the compressor to control the return flow of compressed air, so as to avoid the surge of the supercharger caused by excessive c...

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 requires a relatively high pressure value before it can be fully opened. When the valve is not fully opened, intake noise will be generated, which is easy Surge occurs, whistling occurs

[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 not be restored in time, and the instantaneous response is poor. Reduced speed-up performance and comfort

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