Patent ID: 7503413
Filing Date: 2009-03-17
Classification: B60K,B60L,B60W,F02N,Y02T,Y10S

Abstract:
1. A method for determining when to stop an engine in a vehicle having a second power source, the method comprising: comparing at least one engine condition to a corresponding predetermined engine condition, thereby generating a first flag; comparing at least two vehicle system controller conditions to corresponding predetermined vehicle system controller conditions, thereby generating a second flag, the at least two vehicle system controller conditions including at least two vehicle conditions chosen from a set of vehicle conditions, the set of vehicle conditions including a current vehicle speed, a maximum vehicle speed since engine start, and an engine runtime, the step of comparing at least two vehicle system controller conditions to corresponding predetermined vehicle system controller conditions including: comparing the maximum vehicle speed since engine staff to a predetermined minimum vehicle speed, and comparing the engine runtime to a predetermined runtime, the generated second flag indicating an engine standby enable condition only when at least one of the maximum vehicle speed since engine staff is greater than the predetermined minimum vehicle speed, or the engine runtime is greater than the predetermined runtime; comparing at least one second power source condition to a corresponding predetermined second power source condition, thereby generating a third flag; and stopping the engine when at least one of the flags indicates an engine stop condition.