Damping oil outlet of VE distribution pump and application method of damping oil outlet valve

Abstract

The invention discloses a damping oil outlet valve of a VE distribution pump and an application method of the damping oil outlet valve. The oil outlet valve comprises a tubular oil outlet valve fastening seat, wherein the outer part of the oil outlet valve fastening seat is provided with a protrusion, the end part of the oil outlet valve fastening seat is provided with a stepped hole, a valve coreis arranged in the stepped hole, an opening of the stepped hole is connected with an oil outlet valve seat through a clamp spring, and a through hole is formed in the center of the oil outlet valve seat; the valve core comprises a columnar core body, a guide hole is formed in the center of one end of the core body, a through throttle hole is formed in the center of the bottom of the guide hole, acircle of oil passage hole is uniformly formed in the root of the guide hole, the oil passage holes penetrate through the side wall of the core body, a spring is arranged in the guide hole, the end part of the spring is in contact with the bottom of the stepped hole in the end part of the oil outlet valve fastening seat, and the end surface of the valve core is tightly attached to the oil outletvalve seat located at the inner end surface of the stepped hole under the action of the spring. The oil outlet valve does not need to be combined with a limiter, so that the machining difficulty and assembling step are greatly reduced, the production efficiency is improved, and the manufacturing cost is reduced.

Description

technical field [0001] The invention relates to the technical field of fuel pump equipment, in particular to a damping fuel outlet valve of a VE distribution pump. Background technique [0002] In the VE pump fuel system, a fuel outlet valve is installed between the fuel pump and the high-pressure fuel pipe. The function of the oil outlet valve is similar to that of a one-way valve. When the oil pump supplies oil, the oil outlet valve opens in the forward direction, and the oil pump supplies oil to the high-pressure oil pipe. When the oil supply is over, the valve core of the oil delivery valve is seated, and at the same time, the pressure of the high-pressure oil pipe is reduced rapidly, so that the injector is quickly closed and the oil injection is stopped. [0003] The damping oil outlet valve is commonly used in the VE pump of the current direct injection engine, and a valve core and a stopper are arranged in the valve seat, and the stopper and the valve seat have an i...

AI Technical Summary

Problems solved by technology

The size of the oil outlet valve is small, and the diameter of the stopper is small. In order to ensure a tight fit, the processing requirements are relatively high. At the same time, pressing equipment and positioning tooling are required to perform pressing operations during processing. The production is difficult and the yield is not high. expensive to manufacture

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