The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Oct. 16, 1990

Filed:

Oct. 19, 1988
Applicant:
Inventors:

Yoshikazu Ishikawa, Saitama, JP;

Kouji Yamaguchi, Saitama, JP;

Koji Sasajima, Tokyo, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60K / ;
U.S. Cl.
CPC ...
74866 ; 74858 ;
Abstract

The speed reduction ratio of a continuously variable speed transmission is controlled by setting a reference engine speed according to a parameter representing a driver's intention of acceleration, such as the depression of an accelerator pedal, and controlling the speed reduction ratio so as to equalize the engine rotational speed with the reference engine speed. When the parameter is lowered such as by releasing the accelerator pedal, the process of controlling the speed reduction ratio due to a reduction in the reference engine speed caused by the reduction in the parameter is started after a certain time delay.


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