High-pressure in-line plunger pump and high-pressure common-rail fuel injection system

Abstract

The invention discloses a high-pressure in-line plunger pump. The high-pressure in-line plunger pump comprises a pump body component, and further comprises an oil delivery pump, an eccentric driving mechanism, a plunger and barrel assembly, an oil valve component, an oil outlet valve, an oil control valve tightening cap and an oil inlet metering valve which are mounted on the pump body component, wherein the eccentric driving mechanism drives the plunger and barrel assembly to do reciprocating motion in the pump body component, high-pressure oil output by the oil delivery pump passes through the oil inlet metering valve and then enters a high-pressure cavity formed by the oil valve component and the plunger and barrel assembly, and through the reciprocating motion of the plunger and barrel assembly, high-pressure oil flows out of the oil outlet valve and the oil control valve tightening cap in sequence. The invention further discloses a high-pressure common-rail fuel injection system which comprises the high-pressure in-line plunger pump.

Description

technical field [0001] The invention relates to a plunger pump, in particular to a high-pressure in-line plunger pump and a high-pressure common rail fuel injection system. Background technique [0002] With the rapid development of electronic control technology and stricter emission regulations, the electronically controlled high-pressure common rail fuel injection system for diesel engines has become one of the development trends of modern diesel engine technology. The diesel engine electronically controlled high-pressure common rail fuel injection system can accurately and flexibly control the fuel injection quantity, fuel injection timing and injection pressure of the diesel engine, mainly depending on the plunger pump used. However, the existing plunger pumps used in electronically controlled high-pressure common rail fuel injection systems have the problems of poor usability to fuel impurities, affecting the service life of the product, high processing difficulty, high...

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Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to provide a high-pressure in-line plunger pump and a high-pressure common rail fuel injection system to at least solve the problem of poor usability of fuel impurities in related technologies, affecting the service life of the product, high processing difficulty, high cost, and poor exhaust. Smooth, low-speed start-up problem

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