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.
Patent No.:
Date of Patent:
Apr. 14, 1992
Filed:
Jun. 05, 1991
Shigeki Shimanaka, Kanagawa, JP;
Yuji Kato, Tokyo, JP;
Tatsuo Wakahara, Kanagawa, JP;
Hiroshi Asano, Kanagawa, JP;
Shinsuke Nakazawa, Kanagawa, JP;
Hiroshi Sasaki, Kanagawa, JP;
Hiroshi Yamaguchi, Kanagawa, JP;
Kazuhiro Ishigami, Kanagawa, JP;
Shinichi Takenouchi, Kanagawa, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
In order to determine a malfunction which results in the loss of torque reduction control, the engine speed and the torque converter characteristics are monitored when a torque down signal is issued. The maximum engine torque which should be produced under such circumstances is used to derive a corresponding maximum engine speed value. If the actual engine speed exceeds the estimated value, appropriate torque down control can be assumed to have been lost. In response a fail safe such as boosting line pressure to switching to an alternative source of torque control can implemented. A suitable warning signal can also be generated.