opposed engine

Abstract

The invention discloses an opposed engine, comprising a plurality of pairs of cylinders, crankcases, piston assemblies, crankshafts and connecting rods arranged oppositely, a drive assembly and a valve assembly driven by the drive assembly; the drive assembly includes A camshaft perpendicular to the crankshaft space, a lifter assembly driven by the camshaft, and a valve rocker arm assembly that swings and drives the valve assembly under the drive of the lifter assembly; the camshaft and the crankshaft are vertically interleaved for transmission; the crankshaft directly drives the camshaft Drive the valve rocker arm to drive the intake valve and exhaust valve to reciprocate open and close, the crankshaft outputs directly, and there is no transmission transmission mechanism in the middle, the structure is compact, which is helpful for the lightweight of the engine. The arrangement on the helicopter; the tappet and the tappet are placed outside the engine cavity, which is conducive to the reduction of the engine volume and the overall light weight, and the improvement of the engine power-to-weight ratio.

Description

technical field [0001] The invention belongs to the technical field of engines, and particularly relates to an opposed engine. Background technique [0002] The valve train of the engine is to open and close the intake and exhaust valves of each cylinder regularly according to the requirements of the working cycle and ignition sequence in each cylinder of the engine, so that fresh combustible mixed working fluid (gasoline engine) or air (diesel engine) ) can enter the cylinder in time and exhaust gas can be discharged from the cylinder in time. [0003] Most of the existing opposed engines are four-stroke engines; the working cycle of a four-stroke engine consists of four piston strokes, namely the intake stroke, the compression stroke, the power stroke and the exhaust stroke. During this process, the piston reciprocates up and down. For four strokes, the corresponding crankshaft makes two revolutions. Compared with two-stroke engines, four-stroke engines have low fuel con...

AI Technical Summary

Problems solved by technology

[0004] 1) The camshaft is often arranged parallel to the crankshaft, and is connected by a gear or a chain transmission. The structure is complex, the engine is heavy, the transmission efficiency is reduced, and the development and maintenance costs are increased;

[0005] 2) The tappets and tappets of the valve mechanism are often built into the engine cavity, which is not conducive to the reduction in size and weight of the engine;

[0006] 3) The valve angle of the valve mechanism is relatively large, resulting in increased intake resistance and low intake efficiency of the engine

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