Cold start control for vehicle with automatic transmission

摘要

A power train in a vehicle with an automatic transmission has a cold start program initiated when the engine is started with the engine temperature below a set level. During the cold start program the gear change levels are moved to higher speeds. The improved control (S1-6) measures the energy output of the power train. When a preset total power level is reached the control switches the gear change program back to lower, normal levels. The cold start program is activated when the coolant or lubricant temperature is below a set value.