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:
Oct. 16, 1990
Filed:
Oct. 27, 1988
Abstract
A system and method for automatically controlling a vehicle speed to a desired cruise speed are disclosed in which when at least one of conditions that any one of command signals from corresponding operation command switches is outputted and that a microcomputer of the automatic cruise speed controlling system normally operates and outputs control command signals indicating that corresponding one of control valves is energized is satisfied, the power supply to the control valves is enabled. On the contrary, when at least one of conditions that none of the command signals from the corresponding command switches is outputted and that the microcomputer erroneously outputs control command signals indicating that the corresponding one of the control valves is energized is satisfied, the power supply to the control valves is disabled. The control valves cause air pressure in a chamber defined by a diaphragm to be adjusted, the diaphragm being linked to an engine throttle valve, so that an opening angle of the throttle valve is adjusted to control the vehicle speed.