A METHOD AND SYSTEM FOR CONTROLLING A BELT-DRIVEN INTEGRATED STARTER GENERATOR
First Claim
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1. A method for controlling an engine and a belt-driven integrated starter generator (B-ISG) connected to the engine, the method comprising:
- determining engine running indicators;
shutting down the engine if the determined engine running indicators signify (i) a desire to stop the engine, and (ii) the B-ISG has sufficient electrical power for cranking the engine;
determining engine stopped indicators; and
starting the engine if the determined engine stopped indicators signify (i) a load on the engine is sufficiently low for the B-ISG to start the engine without slipping, and (ii) a desire to start the vehicle.
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Abstract
A method for controlling an engine and a belt-driven integrated starter (B-ISG) connected to the engine. The method includes determining engine running indicators and engine stopped indicators. Based on the indicators, the method controls the engine and the B-ISG for coordinating engine stops and starts with a capability of the B-ISG to start the engine.
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Citations
20 Claims
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1. A method for controlling an engine and a belt-driven integrated starter generator (B-ISG) connected to the engine, the method comprising:
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determining engine running indicators;
shutting down the engine if the determined engine running indicators signify (i) a desire to stop the engine, and (ii) the B-ISG has sufficient electrical power for cranking the engine;
determining engine stopped indicators; and
starting the engine if the determined engine stopped indicators signify (i) a load on the engine is sufficiently low for the B-ISG to start the engine without slipping, and (ii) a desire to start the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for implementing a control strategy for controlling a vehicle equipped with an engine and a belt-driven integrated starter generator (B-ISG) connected to the engine, the system comprising:
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a control module adapted to control the engine and the B-ISG, the control module having a memory in electrical communication with inputs and outputs of the control module, the control module delivering signals to the outputs for controlling the engine and the B-ISG;
a plurality of sensors for determining engine running indicators and engine stopped indicators, the sensors delivering electrical signals to the inputs of the control module; and
instructions stored in the memory for executing the control strategy, the control strategy comprising starting the engine if the determined engine stopped indicators signify (i) a load on the engine is sufficiently low for the B-ISG to start the engine without slipping, and (ii) a desire to start the vehicle. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method for determining a state of a vehicle equipped with an engine and a belt-driven integrated starter (B-ISG) connected to the engine and based on the determined state controlling the engine and the B-ISG for increasing fuel economy and reducing emissions by coordinating engine stops and starts with a capability of the B-ISG to start the engine, the method comprising:
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determining a key off state if no key is in an ignition;
determining a power on state if (i) the key off state is determined, and (ii) a key in the ignition is turned to an on position;
determining an enable starter state if (i) the power on state is determined, and (ii) the key in the ignition is turned to an ignition start position;
determining an engine running state if (i) the enable starter state is determined, and (ii) an alternator revolution per minute (ARPM) is greater than or equal to a minimum engine running ARPM;
determining a stopping engine state and controlling the engine to shut down if (i) the engine running state is determined, (ii) a brake indicator is determined, (iii) a not wheel indicator is determined, (iv) a vehicle speed (VSS) is less than or equal to a minimum stopping state VSS, and (v) a state of charge (SOC) of the B-ISG indicates the B-ISG has sufficient electrical power for turning the crankshaft;
determining a stopped engine state if (i) the stopping engine state is determined, (ii) the VSS is less than a minimum stopped engine VSS, and (iii) the ARPM is less than a minimum stopped engine ARPM, wherein the stopped engine state indicates the B-ISG is capable of starting the engine without slipping; and
determining an enable B-ISG state and controlling the engine to start if (i) the stopped engine state is determined and (ii) a desire engine start is determined. - View Dependent Claims (17, 18, 19, 20)
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Specification