Pump-rail integrated electric control common rail high-pressure oil supply system assembly

Abstract

The invention discloses a pump-rail integrated electric control common rail high-pressure oil supply system assembly which comprises a high-pressure oil supply pump assembly, a common rail pipe assembly and a sealing mechanism of the common rail pipe assembly, the common rail pipe assembly is installed above the high-pressure oil supply pump assembly, and the common rail pipe assembly comprises a rail body, a pressure limiting valve component and a rail pressure sensor. The high-pressure oil supply pump assembly is arranged in a multi-cylinder in-line mode, the high-pressure oil supply pump assembly comprises a pump body, a cam shaft, a roller body assembly and an oil pumping system component, the oil pumping system component is installed in an oil pumping system installation hole in the upper portion of the pump body, and the oil pumping system component is connected with the pump body through a thread pair. Through the integrated design of the high-pressure oil supply pump assembly and the common rail pipe assembly, the risk of oil leakage is reduced, and design and installation of a high-pressure oil pipe of the diesel engine are simplified; the structure of the electric control common rail high-pressure oil supply system is simplified, the pressure loss and fluctuation of high-pressure diesel oil can be reduced, the oil injection control precision is improved, and meanwhile the installation space of the electric control common rail oil injection system on a diesel engine is saved.

Description

technical field [0001] The invention belongs to the technical field of high-pressure oil supply pump assemblies, and in particular relates to an electronically controlled common rail high-pressure oil supply system assembly with integrated pump rails. Background technique [0002] Diesel engines are widely used in automobiles, construction machinery, agricultural machinery, ships, power generation and other fields. In order to reduce fuel consumption, reduce emissions, and improve the environment, more and more diesel engines have begun to use electronically controlled high-pressure common rail fuel injection systems. The diesel engine electronically controlled high-pressure common rail fuel injection system includes high-pressure fuel supply pump assembly, common rail pipe assembly, common rail injector assembly, electronic control unit (ECU), wiring harness, etc. The existing technology electronically controlled high-pressure common rail fuel injection In the system, the ...

AI Technical Summary

Problems solved by technology

Due to the many parts and complex shapes of the diesel engine, the high-pressure fuel pipe needs to be bent in many places to meet the installation requirements; at the same time, when the high-pressure diesel oil flows in the high-pressure fuel pipe, it will be affected by the bending direction and cause pressure loss, which will affect the pressure transmission of the diesel oil; On the other hand, affected by the dimensional accuracy of processing and installation, the high-pressure oil pipe joints and their fittings cannot be connected accurately, resulting in uneven force when the high-pressure oil pipe joints are tightened, making it difficult to tighten the high-pressure oil pipes and even causing the risk of oil leakage after tightening

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