Inlet and air distribution system based on electro-hydraulic control

Abstract

The invention provides a gas intake and distribution system based on an electric hydraulic control mode and belongs to the technical field of internal combustion engines. An outlet and an inlet of a high pressure oil pipe are communicated with an oil inlet I and a high pressure oil outlet respectively, an outlet and an inlet of an oil return pipe I are communicated with a valve casing hole and an oil return hole I respectively, an outlet and an inlet of an oil return pipe II are communicated with an inlet of an oil return pipe III and an oil drain duct respectively, an inlet of an engine oil valve oil return pipe II is communicated with an engine oil valve oil return hole II, an inlet of an engine oil valve oil return pipe I is communicated with an engine oil valve oil return hole I, an outlet and an inlet of a low pressure oil pipe are communicated with a low pressure oil inlet and a low pressure oil pipe I respectively, and an inlet of the low pressure oil pipe I and an outlet of the oil return pipe III are arranged in an oil tank; a low pressure oil pipe II is connected with an inlet of an engine oil valve oil intake pipe and a one-way valve II in series, an outlet of the engine oil valve oil intake pipe is communicated with an engine oil valve oil inlet, and a stepping motor, a rotation outer valve cylinder position sensor and a camshaft position sensor are controlled by an electronic control unit. Valve seating impact is small, valve closing moment and lift control is flexible, throttle-valve-free control and a miller cycle can be achieved, reliability is high and manufacturing cost is low.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engines, and in particular relates to an air distribution system capable of continuously adjusting the closing time and lift of an intake valve. Background technique [0002] The function of the ignition-type internal combustion engine intake valve mechanism is to open and close the intake valve regularly according to the requirements of the working cycle and firing sequence in each cylinder of the engine, so that fresh charge can enter the cylinder in time. On the one hand, in order to increase the amount of gas entering the cylinder, the intake valve should be closed after the suction bottom dead center, and the delayed closing angle is called the intake late closing angle. The optimal intake delay angle is related to the engine speed. The ideal intake law is that the engine intake delay angle increases with the increase of the engine speed to meet the power requirements. On the oth...

AI Technical Summary

Problems solved by technology

Among them, the mechanical variable valve mechanism has the disadvantages that the control mechanism is not flexible enough, the variable range of valve lift and valve phase is small, and the transmission mechanism is complex; the electromagnetic drive variable valve mechanism has the disadvantages of large valve seating impact and insufficient electromagnetic response speed. High energy consumption and excessive size; the electro-hydraulic variable valve mechanism also has the disadvantages of large valve seating impact and insufficient response speed of the solenoid valve

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