Control method for internal combustion engine system, and internal combustion engine system
First Claim
1. A control method for an internal combustion engine system for a vehicle, which includes an internal combustion engine, an electric drive unit adapted to start up the internal combustion engine, a starter battery for use as an electric power source for activating the electric drive unit, an electric load that is activated in a stopped-state of the internal combustion engine, and a general-purpose battery for supplying electric power to the electric load, the control method comprising:
- automatically stopping the internal combustion engine being running upon satisfaction of a given automatic stop condition;
supplying electric power from the starter battery to the electric drive unit to automatically restart the internal combustion engine upon satisfaction of a given restart condition after the internal combustion engine is automatically stopped;
detecting the presence or absence of a post-attached load to be supplied with electric power from the starter battery in a post-attached load detection, wherein the post-attached load is provided in addition to electric loads in conformity with specifications of the vehicle and connected to the starter battery, based on a discharging status of the starter battery due to the post-attached load in the automatically stopped state of the internal combustion engine; and
restarting the internal combustion engine irrespective of the satisfaction or non-satisfaction of the restart condition when the post-attached load is detected as a result of the post-attached load detection.
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Accused Products
Abstract
The invention relates to a control method for an internal combustion engine system, capable of preventing an internal combustion engine in a state after being automatically stopped, from falling into an unrestartable state. Upon satisfaction of a given automatic stop condition, the engine 10 being running is automatically stopped (Step 11). A value of current IEBAT flowing out of a starter battery 520 is compared with a given current value IEBAT
15 Citations
20 Claims
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1. A control method for an internal combustion engine system for a vehicle, which includes an internal combustion engine, an electric drive unit adapted to start up the internal combustion engine, a starter battery for use as an electric power source for activating the electric drive unit, an electric load that is activated in a stopped-state of the internal combustion engine, and a general-purpose battery for supplying electric power to the electric load, the control method comprising:
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automatically stopping the internal combustion engine being running upon satisfaction of a given automatic stop condition; supplying electric power from the starter battery to the electric drive unit to automatically restart the internal combustion engine upon satisfaction of a given restart condition after the internal combustion engine is automatically stopped; detecting the presence or absence of a post-attached load to be supplied with electric power from the starter battery in a post-attached load detection, wherein the post-attached load is provided in addition to electric loads in conformity with specifications of the vehicle and connected to the starter battery, based on a discharging status of the starter battery due to the post-attached load in the automatically stopped state of the internal combustion engine; and restarting the internal combustion engine irrespective of the satisfaction or non-satisfaction of the restart condition when the post-attached load is detected as a result of the post-attached load detection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An internal combustion engine system for a vehicle, including an internal combustion engine, an electric drive unit adapted to start up the internal combustion engine, a starter battery for use as an electric power source for activating the electric drive unit, an electric load that is activated in a stopped-state of the internal combustion engine, a general-purpose battery for supplying electric power to the electric load and running control unit configured to govern a running control of the internal combustion engine, the running control unit comprising:
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an automatic stop unit operable, upon satisfaction of a given automatic stop condition, to automatically stop the internal combustion engine being running; a restart unit operable, upon satisfaction of a given restart condition after the internal combustion engine is automatically stopped, to allow electric power to be supplied from the starter battery to the electric drive unit so as to automatically restart the internal combustion engine; a post-attached load detection unit operable to detect the presence or absence of a post-attached load to be supplied with electric power from the starter battery wherein the post-attached load is provided in addition to electric loads in conformity with specifications of the vehicle and connected to the starter battery, based on a discharging status of the starter battery due to the post-attached load in the automatically stopped state of the internal combustion engine; and a forcible restart unit operable, when the post-attached load is detected as a detection result of the post-attached load detection unit, to restart the internal combustion engine irrespective of the satisfaction or non-satisfaction of the restart condition. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification