SYSTEM AND METHOD FOR CONTROLLING TORQUE OF ENGINE
First Claim
1. A method for controlling engine torque of a hybrid vehicle, the method comprising:
- receiving, by a control unit, engine mapping information including intake temperature and barometric pressure compensation factors that are the bases for an engine test;
calculating, by the control unit, a currently available torque of the engine in consideration of current intake temperature and barometric pressure compensation factors calculated in the engine mapping information; and
calculating, by the control unit, a current optimal operating line (OOL) torque in the engine by applying an OOL ratio at each RPM in the engine test to the currently available torque of the engine,wherein the engine test is a test conducted under predetermined conditions for generating a specific fuel consumption (SFC) map.
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Abstract
Disclosed is a system and method for controlling engine torque of a hybrid vehicle. In particular, engine mapping information including intake temperature and barometric pressure compensation factors that are the bases for an engine test is received at a control unit. The control unit then calculates a currently available torque of the engine based on the current intake temperature and barometric pressure compensation factors calculated in the engine mapping information, and calculates a current optimal operating line (OOL) torque in the engine through applying an OOL ratio over each RPM in the engine test to the currently available engine torque. The engine test is a test conducted under predetermined conditions for generating a specific fuel consumption map. Advantageously, fuel efficiency may be improved by controlling an engine of a hybrid vehicle at an optimal torque in consideration of current external conditions as well.
15 Citations
18 Claims
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1. A method for controlling engine torque of a hybrid vehicle, the method comprising:
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receiving, by a control unit, engine mapping information including intake temperature and barometric pressure compensation factors that are the bases for an engine test; calculating, by the control unit, a currently available torque of the engine in consideration of current intake temperature and barometric pressure compensation factors calculated in the engine mapping information; and calculating, by the control unit, a current optimal operating line (OOL) torque in the engine by applying an OOL ratio at each RPM in the engine test to the currently available torque of the engine, wherein the engine test is a test conducted under predetermined conditions for generating a specific fuel consumption (SFC) map. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A non-transitory computer readable medium containing program instructions executed by a control unit, the computer readable medium comprising:
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program instructions that receive engine mapping information including intake temperature and barometric pressure compensation factors that are the bases for an engine test; program instructions that calculate a currently available torque of the engine in consideration of current intake temperature and barometric pressure compensation factors calculated in the engine mapping information; and program instructions that calculate a current optimal operating line (OOL) torque in the engine by applying an OOL ratio at each RPM in the engine test to the currently available torque of the engine, wherein the engine test is a test conducted under predetermined conditions for generating a specific fuel consumption (SFC) map. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A system for controlling engine torque of a hybrid vehicle, the method comprising:
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a control unit configured to receive engine mapping information including intake temperature and barometric pressure compensation factors that are the bases for an engine test, calculate a currently available torque of the engine in consideration of current intake temperature and barometric pressure compensation factors calculated in the engine mapping information, and calculate a current optimal operating line (OOL) torque in the engine by applying an OOL ratio at each RPM in the engine test to the currently available torque of the engine, wherein the engine test is a test conducted under predetermined conditions for generating a specific fuel consumption (SFC) map. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification