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:
Sep. 10, 1985
Filed:
Mar. 11, 1983
Nobuo Habu, Susono, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A method for indicating gear shifting operation to be performed which comprises the steps of calculating current engine load from the intake air flow Q and the number of engine rotations (i.e. engine speed), comparing the current engine load thus calculated with a predetermined engine load constant, calculating current shift position from the result of the comparison, seeking a first engine load operation function Y=f(N) and a second engine load operation function .beta.=g(N) from known equal fuel consumption rate curves, comparing the first engine load operation function Y thus sought with said current engine load Q/N, and indicating either shift-up or shift-down operation to be performed by a driver in accordance with the result of the comparison. According to the method according to the present invention, preferable shift positions to be performed in the optimum fuel consumption rate can be thereby enabling the maximum engine fuel consumption performance to be carried out during running of a car.