Patent ID: 6267707
Filing Date: 2001-07-31
Classification: B60W,F02D,F16H,Y10T

Abstract:
A process for shifting an automatic transmission in a motor vehicle having an internal-combustion engine in which fuel is injected, and an electronic engine timing system which is coupled with a driving element, the driving element being adjustable by a driver to demand a change in output of the engine, the automatic transmission having an electronic transmission control system which automatically shifts transmission gears, wherein the electronic transmission control system is electrically coupled with the electronic engine timing system and both of said systems are constructed such that when:(a) an adjustment of the driving element is being made to demand an increase in the output of the engine to a desired higher output, and simultaneously(b) a gear shift operation is taking place in the automatic transmission and the automatic transmission is in a critical shifting phase in which an undesirable slip operation condition or an undesirable jolt-type termination of a slip operation would occur if the engine output were immediately increased to said desired higher output,if a rate of said adjustment and an extent of the desired higher output each exceed predetermined values, respectively, then the increase in output from the engine is controlled according to at least one of the following conditions:(i) delaying the increase in output from the engine for a period of time; and(ii) reducing or limiting a gradient of the increase in output from the engine via the engine timing system;wherein said at least one of said conditions (i) and (ii) is performed by controlling the fuel infection with the electronic engine timing system as a function of the adjustment of the driving element.