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:
Jun. 30, 1992
Filed:
Aug. 07, 1990
Georg Haubner, Berg/Oberpf, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The method of controlling the modulation pressure in an automatic transmission of a motor vehicle engine includes determining which of n types of engines is being controlled, converting a digitized measured engine load value to one of eight scaled binary values, converting a digitized measured engine speed value signal to one of 32 scaled binary values, combining the scaled binary values of both engine speed and load into an address word for addressing one of n.times.256 storage locations of a data storage device containing reference control data, addressing the storage location corresponding to the address word and transferring the contents of the storage location so addressed to a microprocessor, which generates a current controlling a modulation pressure valve connected to the transmission according to the predetermined engine speed and load dependent data. For greater control sensitivity, reference data is retrieved from adjacent storage locations and an interpolation of the reference data in those locations is performed.