Load condition preemption of scheduled gearshifts in an automatic transmission

摘要: An electronic control system for scheduling gearshifts in an automatic transmission includes storing memory accessible to a microprocessor, functions relating vehicle speed throttle position, one function being related each upshift and downshift. Gearshifts are made by probing computer with current values position speed, determining on the basis of stored shift schedule whether or downshift is required. Upshift points determined also empirically acceleration immediately before upshift. Shift logic commands predetermined schedule, provided minimum acceleration-engine criteria satisfied. Vehicle from schedules gearshift corrected automatically continually calculated ratio account changes driveline components originally installed powertrain which member differences these component produce base NOV value.