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:
Mar. 12, 2002
Filed:
Jan. 21, 1999
Nagao Miyazaki, Osaka, JP;
Japan Electronics Industry Ltd., Osaka, JP;
Abstract
An ABS apparatus according to the present invention has an arbitrary number of first sensors ( ) capable of obtaining road frictional force information according to road frictional force F acting between a wheel of a car and a road on which the car is moving and braking torque information according to braking torque T acting between the wheel of the car and a braking equipment, a differential parameter calculating means ( ) for calculating a differential parameter M according to the road frictional force information and the braking torque information from these first sensors ( ), and a solenoid valve controlling means ( ) for starting and then stopping a pressure reducing operation when the differential parameter M calculated by the differential parameter calculating means ( ) reaches a first threshold provided according to a peak value of the differential parameter M or a second threshold having an absolute value slightly smaller than that of the first threshold while the barking equipment is in operation.