CONTROL ARCHITECTURE AND METHOD TO EVALUATE ENGINE OFF OPERATION OF A HYBRID POWERTRAIN SYSTEM OPERATING IN A CONTINUOUSLY VARIABLE MODE
First Claim
1. Method to determine operating conditions for a powertrain comprising an internal combustion engine and first and second electrical machines and an electro-mechanical transmission selectively operative to transmit torque therebetween, the method comprising determining an operating cost for operating the first and second electrical machines of the hybrid transmission to meet an operator torque request when the engine is operating in an engine-off operating state.
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Accused Products
Abstract
There is provided a method and apparatus to determine operating conditions for a powertrain comprising an internal combustion engine and first and second electrical machines and an electro-mechanical transmission selectively operative to transmit torque therebetween. The method comprises determining a torque output and an operating cost for operating the first and second electrical machines of the hybrid transmission effective to meet an operator torque request when the engine is operating in an engine-off operating state. Determining the torque output for operating the first and second electrical machines comprises executing a predetermined system equation effective to determine motor torque outputs from each of the first and second electrical machines based upon the selected parametric value for the input torque and the operator torque request.
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Citations
20 Claims
- 1. Method to determine operating conditions for a powertrain comprising an internal combustion engine and first and second electrical machines and an electro-mechanical transmission selectively operative to transmit torque therebetween, the method comprising determining an operating cost for operating the first and second electrical machines of the hybrid transmission to meet an operator torque request when the engine is operating in an engine-off operating state.
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8. Apparatus, comprising:
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a distributed control module architecture comprising;
a plurality of control modules adapted to control operation of a hybrid powertrain;the hybrid powertrain comprising an internal combustion engine and first and second electrical machines and an electro-mechanical transmission selectively operative to transmit torque therebetween; the transmission selectively operative in one of first and second continuously variable operating modes through selective actuation of a plurality of torque-transfer clutches; and
,the control modules adapted to execute machine code stored therein, the code comprising;
code to determine motor torque outputs and an operating cost for operating the first and second electrical machines of the hybrid transmission to meet an operator torque request when the engine is operating in an engine-off operating state. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. Method for operating a powertrain comprising an internal combustion engine and first and second electrical machines and an electro-mechanical transmission selectively operative to transmit torque therebetween, the method comprising:
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monitoring an operator torque request, and, available battery power; identifying at least one permissible powertrain operating range state comprising an engine-off state; determining torque outputs from the first and second electrical machines to achieve a powertrain torque output to meet the operator torque request in the engine-off state; determining an operating cost for operating the first and second electrical machines to achieve the powertrain torque output to meet the operator torque request in the engine-off state; and
,selectively controlling the powertrain in one of the engine-off operating range states to meet the operator torque request based upon the operating cost. - View Dependent Claims (18, 19, 20)
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Specification