Method for avoiding turbocharger damage
AssigneeFord Global Technologies, LLC
InventorsHarald Stoffels, Ludwig Stump
Life of this patent
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Abstract
A method for operating an engine of a motor vehicle is provided. The method comprises operating at least one turbocharger, operating a start/stop automatic system which automatically switches off the internal combustion engine when a stop condition is met, and automatically starts the internal combustion engine when a starting condition is met, and when the stop condition is met, delaying the automatic switching off of the internal combustion engine by a predefinable delay time (Δt). In one example, automatic shut off of the engine may be delayed in order ensure adequate cooling of the turbocharger.
Claims20
A method for operating an engine, comprising:
- operating a turbocharger;
- operating a start/stop automatic system which automatically switches off the engine when a stop condition is met, and automatically starts the engine when a starting condition is met;
- and
- when the stop condition is met, delaying the automatic switching off of the engine by a predefinable delay time (Δt) if a temperature of oil supplied to the turbocharger is above a threshold temperature.
A method for a turbocharger in an engine, comprising:
- pumping oil to a turbine of the turbocharger with an oil pump;
- under a first condition, shutting off the oil pump in response to an automatic stop condition of the engine;
- and
- under a second condition, shutting off the oil pump later than under the first condition in response to the automatic stop condition of the engine.
A system, comprising:
- an engine;
- a turbocharger including a turbine driven by exhaust gas of the engine;
- an oil pump driven by an external motor;
- an oil line configured to deliver oil pumped by the oil pump to the turbine;
- and
- a controller including instructions to:
- if an automatic stop condition of the engine is met,
- automatically shut down the engine;
- shut down the oil pump concurrently with the automatic engine shut down under a first condition;
- and
- shut down the oil pump after a predetermined time delay following the automatic engine shut down under a second condition.
Dependencies are inferred from the claim text.