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:
Aug. 11, 1981
Filed:
Aug. 29, 1979
Hiroshi Sugimoto, Aichi, JP;
Jiro Nakano, Okazaki, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Abstract
In a vehicle equipped with a main transmission and, in series with it, a sub-transmission which has two speed stages, wherein the sub-transmission is automatically controlled by a main control system of a sub-transmission control system according to various operating parameters of the vehicle and the engine of the vehicle, it is proposed further to provide a sub-control system which is fed with a signal which indicates operation of the braking system of the vehicle, and which generates, when the braking system of the vehicle has been operating for longer than a first predetermined time, a shiftdown signal, which is fed to the main control system so as to override it, and so as to shift the sub-transmission positively into its lower speed stage, so as to provide good engine braking. It is further proposed to so arrange the sub-control system that, when the braking system of the vehicle is in operation, and then is put out of operation for a time which is shorter than a second predetermined time, the shiftdown signal is continuously produced without interruption.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile