Piston for double-stroke crank round sliding block internal combustion engine and internal combustion engine

Abstract

The invention discloses a piston for a double-stroke crank round sliding block internal combustion engine, which comprises a crown part and a piston seat, wherein the crown part comprises a piston top, a piston ring band and a baffle plate which is extended downwards from the piston ring band and is used for shading an air port; the outer diameter face of the baffle plate is matched with the inner diameter face of a cylinder and is unfolded at a set angle in the circumference direction, and the angle can meet the requirement of shading the air port; a round sliding block accommodating hole for mounting a round sliding block is formed on the piston seat; two guide side plates which are extended downwards in the axial direction are symmetrically arranged on the piston ring band; and the outer diameter faces of the guide side plates can be matched with the inner wall of the cylinder. Compared with the prior art, the piston provided by the invention is provided with the baffle plate for shading the air port, and the baffle plate is only extended at a certain angle in the circumference direction and can be designed in a thinner mode, so that the quality of the piston cannot be obviously improved by the baffle plate, and the crank round sliding block engine has the advantage of keeping relatively low reciprocation inertia. In a preferable scheme, scavenging efficiency is improved by a specially arranged scavenging piston.

Description

[0001] This application is a divisional application of the invention patent application with the same name with the application date of June 10, 2009 and the application number of 200910087192.3. technical field [0002] The invention relates to internal combustion engine technology, in particular to a piston used in a two-stroke crank circular slider internal combustion engine. The present invention also relates to a two-stroke crank-slider internal combustion engine using the above-mentioned piston. Background technique [0003] The kinematic mechanism of a traditional engine is a crank linkage mechanism. Under this kind of kinematic mechanism, the reciprocating motion of the piston needs to be transmitted to the crankshaft through the connecting rod connected to it. During the movement, the connecting rod swings back and forth with the movement of the piston, so that the piston is subjected to a periodic change with a higher-order function. lateral force. [0004] Due t...

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