An opening and closing device for the main and auxiliary combustion chamber passage valves of a dimethyl ether engine

Abstract

The invention specifically relates to an opening and closing device for passage valves of main and auxiliary combustion chambers of a dimethyl ether engine. Its technical scheme is: the valve cam (1) is installed on the intake or exhaust camshaft, the first flat chassis (2) is in contact with the valve cam (1), and the first cylinder piston rod (3) is in contact with the first flat chassis. (2) Fixed connection, the rodless chamber of the first cylinder (4) communicates with the A port of the corresponding two-position two-way solenoid valve (6) and the rodless chamber of the second cylinder (8) through a three-way pipe joint , the accumulator (5) is connected to the P port of the two-position two-way solenoid valve (6), the two-position two-way solenoid valve (6) is externally connected to the ECU module (7), and one end of the second cylinder piston rod (9) is connected to the first The second flat chassis (10) is fixedly connected, the second cylinder piston rod (9), the second flat chassis (10) and the valve stem (15) are located on the same axis, and the valve stem (15) is sequentially installed with valve lock clips (12 ), upper valve spring seat (11) and return spring (13). The opening and closing device of the channel valve has the characteristics of variable timing and lift, which can reduce curb weight and improve combustion efficiency.

Description

technical field [0001] The invention belongs to the technical field of main and auxiliary combustion chambers of dimethyl ether engines. In particular, the utility model relates to an opening and closing device for passage valves of main and auxiliary combustion chambers of a dimethyl ether engine. Background technique [0002] Compression ignition internal combustion engines generally use diesel as fuel, and diesel is a derivative of petroleum, and its price is getting higher and higher. Dimethyl ether (DME) has a wide range of sources and is recognized as a clean alternative energy source for diesel engines. It can be converted from coal bed methane, coal, natural gas and bio-organic matter to produce DME. The exhaust gas of DME engines is far more polluting to the environment than The diesel engine is low, and the combustion noise is equivalent to that of a gasoline engine. [0003] The opening and closing action of the main and auxiliary combustion chamber channel valv...

AI Technical Summary

Problems solved by technology

[0003] In the existing dimethyl ether controllable premixing combustion system (the auxiliary combustion chamber is also called the premixing chamber), the opening and closing action of the main and auxiliary combustion chamber channel valves is realized by the cam and the mechanical transmission device (Jun Song, Zhen Huang, XinqiQiao. Performance of a controllable premixed combustion engine fueled with dimethyl ether. Energy Conversion and Management. 2004, 45: 2223–2232), the timing and lift of the main and auxiliary combustion chamber passage valves of the dimethyl ether engine can not be realized It is not conducive to the optimal combustion of the DME engine under various working conditions; in addition, adding a camshaft and a set of driving mechanisms to the mechanical transmission mechanism will not only increase the curb weight of the engine, but also increase the production cost

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