VARIABLE COMPRESSION RATIO INTERNAL COMBUSTION ENGINE HAVING APPROXIMATELY LINEAR MOTION MECHANISM

Title:

VARIABLE COMPRESSION RATIO INTERNAL COMBUSTION ENGINE HAVING APPROXIMATELY LINEAR MOTION MECHANISM

Document Type and Number:

Japanese Patent JP2004239202

Kind Code:

A

Abstract:

To provide a technique for improving the reliability in controlling the motion of a member which is displaced to change a combustion ratio.

In a piston pin 60 at a connection of a piston 20 and a connecting rod 30, an approximately linear motion mechanism 50 for linearly moving the connection along the axial center line of a cylinder is connected. An eccentric bearing 70 is placed in parallel with the piston pin 60 and a compression ratio is changed by adjusting the eccentric position of the eccentric bearing 70. The eccentric position of the eccentric bearing 70 is changed by switching the first state where the eccentric bearing 70 is fixed to the piston 20 and the second state where the eccentric bearing 70 is fixed to the connecting rod 30.

Inventors:

YAGUCHI HIROSHI
SAWADA DAISAKU
NIHEI HIROAKI

Application Number:

JP2003030621A

Publication Date:

August 26, 2004

Filing Date:

February 07, 2003

Export Citation:

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Assignee:

TOYOTA MOTOR CORP

International Classes:

F02B75/04; F02B75/32; F02D15/02; (IPC1-7): F02D15/02; F02B75/04; F02B75/32

Attorney, Agent or Firm:

Meisei International Patent Office

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