Increased loading to improve low load controlled auto-ignition operation
AssigneeFord Global Technologies, LLC
InventorsThemi Petridis, Jonathan O'neill, Harald Stoffels
Life of this patent
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Abstract
A method for controlling an engine and a supplemental torque apparatus of a vehicle, the vehicle having a transmission coupled to the engine, the method comprising of operating at least one cylinder with at least partial auto-ignition combustion, and during a transient gear change where the engine temporarily encounters a low load and low speed operating condition, increasing loading on the engine via the supplemental torque apparatus so that the at least one cylinder may remain operating with at least partial auto-ignition combustion.
Claims20
A method for controlling an engine and a supplemental torque apparatus of a vehicle, the vehicle having a transmission coupled to the engine, the method comprising:
- operating at least one cylinder with at least partial auto-ignition combustion;
- and
- during a transient gear change where the engine temporarily encounters a low load and low speed operating condition, increasing loading on the engine via the supplemental torque apparatus so that the at least one cylinder may remain operating with at least partial auto-ignition combustion.
The method of claim 3 where said increased loading is performed when a battery state of charge is less than a threshold value.
A method for controlling an engine and a supplemental torque apparatus of a vehicle, the method comprising:
- operating at least one cylinder in with at least partial auto-ignition combustion;
- and
- during at least an interval of an idle speed control operating condition and when a battery state of charge is less than a threshold value, increasing loading on the engine via the supplemental torque apparatus so that the at least one cylinder may remain operating with at least partial auto-ignition combustion;
- and
- during a transient gear change where the engine temporarily encounters a low load and low speed operating condition and when a battery state of charge is less than said threshold value, increasing loading on the engine via the supplemental torque apparatus so that the at least one cylinder may remain operating with at least partial auto-ignition combustion.
A system for a vehicle on a road, comprising:
- an internal combustion engine;
- a supplemental torque apparatus configured to supply torque to or absorb torque from the engine;
- an energy storage device coupled to said supplemental torque apparatus;
- a transmission coupling the engine to the road;
- and
- a controller configured to operate at least one cylinder with at least partial auto-ignition combustion;
- adjust a gear of the transmission based at least on a driver input and an operating condition;
- and during a transient gear change, increase loading on the engine via the supplemental torque apparatus so that the at least one cylinder may remain operating with at least partial auto-ignition combustion.
Dependencies are inferred from the claim text.