Methods and systems are provided for improving fuel economy by opportunistically lowering engine idle speed below a base idle speed when electrical loads are not present. A hydraulic brake pressure is increased when the idle speed is raised, in anticipation of vehicle propulsion. The brake pressure counteracts any creep torque and unintended vehicle acceleration resulting from the rising engine idle speed.
METHOD AND SYSTEM FOR ENGINE IDLE SPEED CONTROL
2020-05-28
Patent
Elektronische Ressource
Englisch
Multivariable control of engine idle speed
Kraftfahrwesen | 1997
|Multivariable Control of Engine Idle Speed
SAE Technical Papers | 1997
|