Electric control mechanical valve for turbocharger

Abstract

The invention discloses an electric control mechanical valve for a turbocharger. The electric control mechanical valve consists of a piston, a pneumatic seal ring, an upper shell, a seal ring, a lower shell with electric control jack, a coil winding frame, a fixed iron core, a piston sleeve, a movable iron core, a movable iron core inner shaft sleeve, a movable iron core outer shaft sleeve, a spring, a coil winding and a guide seat, wherein the pneumatic seal ring is fixedly arranged in a semicircular annular groove on an upper end face of the upper shell; the movable iron core outer shaft sleeve, the coil winding frame with the coil winding and the guide seat are embedded in the lower shell by injection molding; the fixed iron core is a circular rod which is pressed in an axle hole of the guide seat; the spring is sleeved on the outer circle of the fixed iron core; the piston is connected with the movable iron core through blank pressing and riveting; the movable iron core inner shaft sleeve is pressed in the axle hole of the movable iron core; the movable iron core is sleeved on the outer circle of the fixed iron core; the upper shell is sleeved on the piston; the upper shell and the lower shell are pressed into a whole through interference fit; and the seal ring is arranged in the annular groove in a hole of the upper shell for sealing the joint part of the upper shell and the lower shell.

Description

technical field [0001] The invention relates to an electrically controlled mechanical valve, in particular to an electrically controlled mechanical valve used on a turbocharger. 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. The current solution is to use a mechanical pressure relief valve integrated 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 com...

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 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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