AUTOMATIC ENGINE CONTROL DEVICE
First Claim
1. An automatic engine control device that controls an automatic engine stop and a restart of an internal combustion engine mounted to a vehicle, comprising:
- a battery capable of charging and discharging electric power;
a starter, electrically connected to the battery through a conductive wiring, that works to start the internal combustion engine when receiving the electric power supplied from the battery;
voltage detection means that detects a voltage of the battery;
present battery internal resistance value obtaining means that obtains a present internal resistance value of the battery;
starter total resistance value calculating means that calculates a starter total resistance value of the starter which is a total of an internal resistance value of the starter and a wiring resistance value of the conductive wiring;
discharging current predicting means that predicts a discharging current to be supplied from the battery to the starter during an automatic engine stop based on a present voltage of the battery, the present internal resistance value of the battery, and the starter total resistance value;
voltage predicting means that predicts, during the automatic engine stop, a voltage of the battery in a period until a next start of the engine based on the present voltage, the present internal resistance value of the battery and the predicted discharging current; and
engine restart judging means that judges, during the automatic engine stop, whether or not the next restart of the engine is permitted based on the predicted voltage.
1 Assignment
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Accused Products
Abstract
An ECU in an automatic engine control device predicts a maximum discharging current to be supplied from a battery to a starter during a next restart of the engine based on a present voltage, an internal resistance value of the battery, and a starter total resistance value during automatic engine stop. The ECU further predicts a minimum voltage of the battery during a period until the next restart of the engine based on the present voltage, the present internal resistance value of the battery, and the predicted maximum discharging current. The ECU judges whether or not execution of the next restart of the engine during the automatic engine stop based on the predicted minimum voltage of the battery.
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Citations
26 Claims
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1. An automatic engine control device that controls an automatic engine stop and a restart of an internal combustion engine mounted to a vehicle, comprising:
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a battery capable of charging and discharging electric power; a starter, electrically connected to the battery through a conductive wiring, that works to start the internal combustion engine when receiving the electric power supplied from the battery; voltage detection means that detects a voltage of the battery; present battery internal resistance value obtaining means that obtains a present internal resistance value of the battery; starter total resistance value calculating means that calculates a starter total resistance value of the starter which is a total of an internal resistance value of the starter and a wiring resistance value of the conductive wiring; discharging current predicting means that predicts a discharging current to be supplied from the battery to the starter during an automatic engine stop based on a present voltage of the battery, the present internal resistance value of the battery, and the starter total resistance value; voltage predicting means that predicts, during the automatic engine stop, a voltage of the battery in a period until a next start of the engine based on the present voltage, the present internal resistance value of the battery and the predicted discharging current; and engine restart judging means that judges, during the automatic engine stop, whether or not the next restart of the engine is permitted based on the predicted voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 15, 19, 20, 21, 22)
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10. An automatic engine control device that controls an automatic engine stop and a restart of an internal combustion engine mounted to a vehicle, comprising:
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a battery capable of charging and discharging electric power; a starter, electrically connected to the battery through a conductive wiring, that works to start the internal combustion engine when receiving electric power supplied from the battery; voltage detection means that detects a voltage of the battery; present battery internal resistance value obtaining means that obtains a present internal resistance value of the battery; starter total resistance value calculating means that calculates a starter total resistance value of the starter which is a total of an internal resistance value of the starter and a wiring resistance value of the conductive wiring; maximum discharging current predicting means that predicts a maximum discharging current to be supplied from the battery to the starter during an automatic engine stop based on a present voltage of the battery, the present internal resistance value of the battery, and the starter total resistance value; minimum voltage predicting means that predicts, during the automatic engine stop, a minimum voltage of the battery in a period until a next start of the engine based on the present voltage, the present internal resistance value of the battery and the predicted maximum discharging current; and engine restart judging means that judges, during the automatic engine stop, whether or not the next restart of the engine is permitted based on the predicted minimum voltage. - View Dependent Claims (11, 12, 13, 14, 16, 17, 18)
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23. An automatic engine control device that controls an automatic engine stop and a restart of an internal combustion engine mounted to a vehicle, comprising:
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a battery capable of charging and discharging electric power; a starter, electrically connected to the battery through a conductive wiring, that works to start the internal combustion engine when receiving electric power supplied from the battery; an electric generator, driven by the internal combustion engine, that generates electric power; voltage detection means that detects a voltage of the battery; present battery internal resistance value obtaining means that obtains a present internal resistance value of the battery; starter total resistance value calculating means that calculates a starter total resistance value of the starter which is a total of an internal resistance value of the starter and a wiring resistance value of the conductive wiring; discharging current predicting means that predicts a discharging current to be supplied from the battery to the starter based on a present voltage of the battery, the present internal resistance value of the battery, and the starter total resistance value; voltage predicting means that predicts, during the working of the engine and the stop of the electric generator, a voltage of the battery when the engine is automatically stopped during a period until a next restart of the engine based on the present voltage of the battery, the present internal resistance value of the battery, and the predicted discharging current; and automatic engine stop permission judging means that judges whether or not the stop of the engine is permitted during the working of the engine based on the predicted voltage of the battery.
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24. An automatic engine control device that controls an automatic engine stop and a restart of an internal combustion engine mounted to a vehicle, comprising:
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a battery capable of charging and discharging electric power; a starter, electrically connected to the battery through a conductive wiring, that works to start the internal combustion engine when receiving electric power supplied from the battery; an electric generator, driven by the internal combustion engine, that generates electric power; voltage detection means that detects a voltage of the battery; present battery internal resistance value obtaining means that obtains a present internal resistance value of the battery; starter total resistance value calculating means that calculates a starter total resistance value of the starter which is a total of an internal resistance value of the starter and a wiring resistance value of the conductive wiring; maximum discharging current predicting means that predicts a maximum discharging current to be supplied from the battery to the starter based on a present voltage of the battery, the present internal resistance value of the battery, and the starter total resistance value; minimum voltage predicting means that predicts, during the working of the engine and the stop of the electric generator, a minimum voltage of the battery when the engine is automatically stopped during a period until a next restart of the engine based on the present voltage of the battery, the present internal resistance value of the battery, and the predicted maximum discharging current; and automatic engine stop permission judging means that judges whether or not the stop of the engine is permitted during the working of the engine based on the predicted minimum voltage of the battery.
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25. An automatic engine control device that controls an automatic engine stop and a restart of an internal combustion engine mounted to a vehicle, comprising:
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a battery capable of charging and discharging electric power; a starter, electrically connected to the battery through a conductive wiring, that works to start the internal combustion engine when receiving electric power supplied from the battery; an electric generator, driven by the internal combustion engine, that generates electric power; voltage detection means that detects a voltage of the battery; present battery internal resistance value obtaining means that obtains a present internal resistance value of the battery; starter total resistance value calculating means that calculates a starter total resistance value of the starter which is a total of an internal resistance value of the starter and a wiring resistance value of the conductive wiring; discharging current predicting means that predicts a discharging current to be supplied from the battery to the starter based on a present voltage of the battery, the present internal resistance value of the battery, and the starter total resistance value; voltage predicting means that predicts, during the working of the engine and the stop of the electric generator, a voltage of the battery when the engine is automatically stopped during a period until a next restart of the engine based on the present voltage of the battery, the present internal resistance value of the battery, and the predicted discharging current; and electric generator driving permission judging means, during the working of the engine and the stop of the electric generator, that judges whether or not start to drive the electric generator is permitted based on the predicted voltage of the battery.
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26. An automatic engine control device that controls an automatic engine stop and a restart of an internal combustion engine mounted to a vehicle, comprising:
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a battery capable of charging and discharging electric power; a starter, electrically connected to the battery through a conductive wiring, that works to start the internal combustion engine when receiving electric power supplied from the battery; an electric generator, driven by the internal combustion engine, that generates electric power; voltage detection means that detects a voltage of the battery; a present battery internal resistance value obtaining means that obtains a present internal resistance value of the battery; starter total resistance value calculating means that calculates a starter total resistance value of the starter which is a total of an internal resistance value of the starter and a wiring resistance value of the conductive wiring; maximum discharging current predicting means that predicts a maximum discharging current to be supplied from the battery to the starter based on a present voltage of the battery, the present internal resistance value of the battery, and the starter total resistance value; minimum voltage predicting means that predicts, during the working of the engine and the stop of the electric generator, a minimum voltage of the battery when the engine is automatically stopped during a period until a next restart of the engine based on the present voltage of the battery, the present internal resistance value of the battery, and the predicted maximum discharging current; and electric generator driving permission judging means, during the working of the engine and the stop of the electric generator, that judges whether or not start to drive the electric generator is permitted based on the predicted minimum voltage of the battery.
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Specification