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:
Dec. 15, 1992
Filed:
Mar. 20, 1991
Norio Suzuki, Wako, JP;
Tetsuya Oono, Wako, JP;
Honda Giken Kogyo K.K., Tokyo, JP;
Abstract
A control system for controlling driving wheels of an automotive vehicle in which when at least one of the driving wheels undergoes excessive slip, an ECU drives a pulse motor to bring a throttle valve of an internal combustion engine installed in the vehicle toward a closed position thereof to thereby suppress the excessive slip. When a state that a detected value of throttle valve opening is smaller than a detected value of accelerator pedal angle while the pulse motor is in stoppage has continued over a predetermined period of time, the ECU determines the initial position of the pulse motor by storing the detected throttle valve opening value as a reference value of the pulse motor position. If the initial pulse motor position has not been determined when a second predetermined period of time has elapsed after the pulse motor started to be driven to bring the throttle valve toward its fully closed position, a throttle system of the engine is determined to be abnormal, and then the pulse motor is forcedly driven to bring the throttle valve into its fully open position. After completion of pulse motor control for suppression of the excessive slip, the ECU carries out open loop control for driving the pulse motor to bring the throttle valve into a substantially fully open position irrespective of whether or not the initial position of the pulse motor has been determined.