Engine Electronically Controlled Hydraulic Gas Distribution System

Abstract

The invention discloses an electronically controlled hydraulic air distribution system for an engine. The system includes: a cylinder body of a hydraulic air distribution mechanism and a piston actuator, which includes a hydraulic cylinder body and a piston. The valve spring moves up and down under the joint action; the oil inlet and oil return pipelines of the hydraulic cylinder, one end of the oil inlet pipeline is connected with the hydraulic cylinder body, and the other end is connected with the engine oil pan, and the oil inlet pipeline and the oil return pipeline are close to the end of the hydraulic cylinder respectively. There are oil inlet and oil return holes; ECU and solenoid valve actuator, ECU and solenoid valve actuator signal connection, ECU controls the solenoid valve actuator to open or close by continuously receiving the engine working status signal from the crankcase signal plate sensor. Close the oil inlet hole and the oil return hole, thereby controlling the hydraulic pressure in the hydraulic cylinder, and then controlling the opening and closing and lift of the valve. The invention can realize the full variable function of the electronic control of the engine valve, including the continuous adjustment of the valve timing, phase and lift.

Description

Technical field [0001] The invention relates to the field of engines, in particular to an engine electronically controlled hydraulic air distribution system. Background technique [0002] In the prior art solutions, the engine valve system generally adopts a camshaft-driven valve solution to achieve intake and exhaust control. Its working principle is: the engine gear train drives the camshaft to rotate, and the intake and exhaust cams on the camshaft rotate synchronously with the camshaft and contact the valve according to the design state to control the opening and closing time and valve lift of the intake and exhaust valves. , To achieve engine intake and exhaust control. [0003] The above scheme of using camshaft-driven valves to achieve intake and exhaust control has the following shortcomings: it is difficult to achieve variable valve functions (that is, to change valve timing or / and valve lift) for a designed camshaft valve system; The air system cannot be shared between ...

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Problems solved by technology

[0003] The above scheme of using the camshaft to drive the valve to realize intake and exhaust control has the following disadvantages: it is difficult to realize the valve variable function (that is, to change the valve timing and / or valve lift) with the designed camshaft distribution system; The air system cannot be shared between two-stroke and four-stroke engines; the camshaft drive valve response is not sensitive, and the engine pumping loss is large

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