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Variable reduction ratio enqine

A technology of engine and compression ratio, applied in engine components, engine control, machine/engine, etc., can solve problems such as complex structure

Inactive Publication Date: 2004-05-26
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, shock loads are applied to actuators such as electric motors and air cylinders, and therefore means for relaxing such shocks must be installed between said actuators and the support shaft, making the structure complicated

Method used

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  • Variable reduction ratio enqine
  • Variable reduction ratio enqine
  • Variable reduction ratio enqine

Examples

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Embodiment Construction

[0029] The present invention will be described below by means of preferred embodiments with reference to the accompanying drawings 1-14.

[0030] Referring to Figures 1 to 3, the engine according to this embodiment is an air-cooled single-cylinder engine, used for example for a working machine, etc., and the engine has an engine body 21, and the engine body includes: a crankcase 22; a cylinder block 23, which slightly upwardly inclined and protruding from one side of the crankcase 22 ; and a cylinder head 24 connected to the top of the cylinder block 23 . A plurality of cooling fins 23 a and 24 a are provided on the outer surfaces of the cylinder block 23 and the cylinder head 24 . Said crankcase 22 is mounted on the cylinder head of any working machine through the mounting surface 22a of its lower surface.

[0031]The crankcase 22 includes a crankcase body 25 formed integrally with the cylinder block 23 by casting, and a side cover 26 connected to an open end of the crankcas...

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PUM

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Abstract

In an engine of a compression-ratio variable type, a subsidiary rod and a piston connected to a crankshaft are connected to each other through a connecting rod, and an eccentric shaft mounted at an eccentric location on a support shaft turnably carried in an engine body and the subsidiary rod are connected to each other through a control rod, so that the compression ration of the engine is changed by changing the turned position of the support shaft. The engine further includes a one-way clutch mounted between the support shaft and the engine body for limiting the direction of turning of the support shaft. The turned position of the support shaft is limited selectively at a plurality of points by a turned-position limiting means, and a load applied to at least one of the support shaft and the turned-position limiting means is moderated by buffering means.

Description

technical field [0001] The invention relates to a variable compression ratio engine, which comprises: a connecting rod, one end of which is connected to a piston through a piston pin; an auxiliary rod, connected to a crankshaft through a crank pin and connected to the other end of the connecting rod; a control rod, one end of which is connected with the auxiliary rod at a position away from the connection position of the connecting rod; a support shaft rotatably provided in the engine body; and an eccentric shaft installed at an eccentric position on the support shaft and connected to the The other end of the control rod is connected to change the rotation position of the support shaft so as to change the compression ratio. Background technique [0002] For example, Japanese Patent Application Laid-Open No. Hei 9-228858 discloses a conventional variable compression ratio engine in which an auxiliary rod connected to a crankshaft and a piston are connected to each other throu...

Claims

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Application Information

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IPC IPC(8): F02D15/02F02B63/02F02B75/02F02B75/04F02B75/16F02D15/04
CPCF02B75/16F02B63/02F02B75/048F02B2275/34F02B2075/027F02D15/04F02D15/02
Inventor 山田义和
Owner HONDA MOTOR CO LTD
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