System for hydraulic compression control over combustion of homogeneous gas mixture of internal-combustion engine

Abstract

The invention discloses a system for hydraulic compression control over combustion of a homogeneous gas mixture of an internal combustion engine. The system comprises an outer sleeve, an energy storage spring, an energy storage piston, a hydraulic piston, a hydraulic piston rod, a return spring, a first stop valve, a second stop valve, an oil pump, a secondary cylinder piston, an oil pump controller and a sensor used for measuring the displacement of the secondary cylinder piston. The outer shelve is fixedly connected with the outer end face of a cylinder cover to form a hydraulic cylinder, a secondary cylinder is arranged on a cylinder cover of the internal-combustion engine, the secondary cylinder is communicated with a cylinder of the internal-combustion engine, and the secondary cylinder piston is arranged inside the secondary cylinder. When hydraulic oil from a hydraulic oil tank enters a hydraulic cylinder from an oil port which is formed in the side face of the outer sleeve, the energy storage piston and the hydraulic piston move in opposite directions. An electro-hydraulic system is used for controlling the secondary cylinder piston rod to move, the flexibility and reaction of the system is improved, the compression ratio precision is controlled, and therefore the ignition moment of the homogeneous gas mixture can be better controlled.

Description

technical field [0001] The invention belongs to the field of combustion control of homogeneous mixed gas, and in particular relates to a system for controlling the combustion of homogeneous mixed gas by hydraulic compression of an internal combustion engine. Background technique [0002] Homogeneous compression ignition refers to a combustion process in which fuel and air are uniformly mixed in advance during the intake process, and the combustible gas is evenly mixed during the compression stroke. When the piston moves to the vicinity of the top dead center, the homogeneous mixture gas naturally ignites. . Compared with traditional internal combustion engines, homogeneous compression ignition not only maintains the characteristics of high power per liter of gasoline engines, but also maintains the advantages of high thermal efficiency of diesel engines. Although homogeneous compression ignition has these advantages, it also faces a series of problems such as the difficulty...

AI Technical Summary

Problems solved by technology

Although homogeneous compression ignition has these advantages, it also faces a series of problems such as the difficulty in controlling the ignition moment in a wide range of speed and load. Combustion of homogeneous mixture is the biggest problem faced by homogeneous compression ignition

Images