Engine starting control strategy
AssigneeInternational Engine Intellectual Property Company, LLC
InventorsTimothy M. Lyons, Paul Gottemoller
Life of this patent
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Abstract
An elapsed time from a time at which the engine last ceased running until a time of occurrence of an engine start command which causes the cranking motor and the lubrication pump to operate is measured. The onset of fueling of the engine cylinders is a function of the elapsed time measured.
Claims15
An internal combustion engine having a crankshaft, a fueling system, cylinders, pistons which reciprocate within the cylinders and rotate the crankshaft when fuel from the fueling system combusts in the cylinders, a lubrication pump operable to pump lubricant to moving parts of the engine, a cranking motor operable to rotate the crankshaft, and an engine controller which controls various aspects of engine operation including the fueling system and the cranking motor and which comprises a control strategy for a) measuring an elapsed time from a time at which the engine last ceased running until a time of occurrence of an engine start command which causes the lubrication pump to operate while the cranking motor is operated for various lengths of time as a function of the elapsed time measured, and b) controlling onset of fueling of the cylinders as a function of the elapsed time measured.
A vehicle having a drivetrain, including a transmission, coupling a crankshaft of a fuel consuming engine to drive wheels for propelling the vehicle on land, the engine having a fueling system for fueling the engine, a mechanism which converts consumption of fuel into rotation of the crankshaft, a lubrication pump operable to pump lubricant to moving parts of the engine, a cranking motor operable to rotate the crankshaft, an engine controller which controls various aspects of engine operation including the fueling system and the cranking motor and which comprises a control strategy for a) measuring an elapsed time from a time at which the engine last ceased running until a time of occurrence of an engine start command which causes the lubrication the lubrication pump to operate while the cranking motor is operated for various lengths of time as a function of the elapsed time measured and b) controlling onset of fueling of the engine as a function of the elapsed time measured.
Dependencies are inferred from the claim text.