Electro-control high pressure injection pump for single cylinder diesel

Abstract

The invention discloses an electro-control high pressure injection pump for single cylinder diesel, which is characterized in that an electromagnet (5) and a solenoid operated valve are arranged under the control of a controller (27) and a fit sensor. A valve body (17) and a valve core (16) are mounted inside a valve hole (K) in a fitting manner, the front part of the valve core (16) is externally sleeved with a valve core spring (15) and the top part thereof is equipped with an armature (13). A low pressure oil cavity (Q) is internally equipped with a lifting stop block (20) and the rear part thereof is sealed by a pump rear cover (21). The controller (27) is connected with the sensor and the electromagnet (5) via wires (26). Upon power off, the valve core (16) is pushed backwards by the valve core spring (15), the valve core (16) and the gap at the bottom of the valve body (17) are communicated with the low pressure oil cavity (Q), and fuel enters a plunger hole (Z) through the low pressure oil cavity (Q). The electromagnet (5) sucks the armature (13) upon power on to drive the valve core (16) forwards so as to seal the bottom hole of the valve body (17), a plunger (8) is positioned inside the plunger hole (Z) to push hydraulic oil towards a high pressure oil hole (G) by means of high pressure, so that the high pressure oil flows out of a throttle valve to be injected into the cylinder via an oil injector. The electro-control high pressure injection pump has high control precision, good fitting property, low oil consumption, low noise and excellent economic and social benefits.

Description

technical field [0001] The invention relates to a single-cylinder diesel engine, in particular to an oil supply system for a diesel engine. Background technique [0002] At present, the annual output of single-cylinder diesel engines in my country is 7 to 9 million units, which is the main power source for the popularization of agricultural mechanization and plays an active role in rural economic activities such as transportation, irrigation, and agricultural product processing. According to statistics, more than 60% of the national diesel is consumed by single-cylinder diesel engines. The fuel injection pump assembly for a single-cylinder diesel engine is composed of a pump body, a plunger coupling, a fuel delivery valve coupling, an adjustment gear, a rack, a plunger spring, and a tight seat of the fuel delivery valve, etc., and is assembled on the diesel engine. The principle is that the cam of the diesel engine drives the plunger through the tappet to generate high pres...

AI Technical Summary

Problems solved by technology

Due to the congenital structural reasons of the purely mechanical structure, there are the following deficiencies in use: low pressure, poor spray quality, insufficient combustion of fuel, a large amount of carbonized particles and combustion smoke, which is not conducive to environmental protection; mechanical centrifugal governor The speed regulation accuracy is poor, the speed regulation rate is too high, it is difficult to meet the speed characteristic requirements of the diesel engine, and the noise is large; the different fuel supply advance angles at different speeds cannot be adjusted continuously, and the fuel consumption is large; the spiral groove of the plunger is easy to wear, and the service life is short. low precision

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