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:
Apr. 21, 1981
Filed:
Dec. 04, 1978
Ferdinand Grob, Besigheim, DE;
Friedrich Rabus, Schwieberdingen, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
Since the maximum jolt amplitude during gear shifts in an automatic transmission occurs when a frictional clutch band is first holding fully and since a mathematical relationship can be established between this maximum amplitude and the amplitude of the jolt while the band is slipping, the maximum permissible jolt amplitude during slippage (R.sub.O) is calculated as a function of the input and output speed of the transmission at the start of the gear shift and the predetermined maximum permissible over-all jolt amplitude (R.sub.max). The actual jolt amplitude is determined continuously, compared to R.sub.O, and the friction band is activated to maintain the actual jolt equal to R.sub.O, while the band is slipping.