System for restarting internal combustion engine when engine restart request occurs
First Claim
1. A system for restarting, according to an occurrence of an engine restart request, an internal combustion engine that has been automatically controlled for stopping in response to an engine automatic stop request, the internal combustion engine normally working to burn fuel to rotate a crankshaft with a ring gear attached, the system comprising:
- a starter provided with a motor for rotatably driving an output shaft with a pinion and an actuator working to shift the pinion toward the ring gear to be engaged with the ring gear;
a monitor unit working to monitor a rotational speed of the internal combustion engine, the rotational speed of the internal combustion engine dropping by the automatic control for stopping the internal combustion engine; and
when the engine restart request occurs with the rotational speed being within a preset range during the rotational speed of the internal combustion engine dropping by the automatic control for stopping the internal combustion engine, a drive unit working to;
drive the actuator to shift the pinion toward the ring gear to be engaged with the ring gear without synchronizing a rotational speed of the pinion with the ring gear; and
rotatably drive the motor with the pinion being at least partly engaged with the ring gear to thereby crank the crankshaft of the internal combustion engine.
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Accused Products
Abstract
In a system, a starter includes a motor for rotatably driving an output shaft with a pinion and an actuator that shifts the pinion toward a ring gear to be engaged with the ring gear. A monitor unit monitors a rotational speed of the internal combustion engine. The rotational speed of the internal combustion engine drops after an automatic control for stop of the engine. When an engine restart request occurs with the rotational speed being within a preset range during the rotational speed of the internal combustion engine dropping by the automatic control for stop of the engine, a drive unit drives the actuator to shift the pinion toward the ring gear to be engaged with the ring gear. The drive unit rotatably drives the motor with the pinion being engaged with the ring gear to thereby crank the crankshaft.
44 Citations
26 Claims
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1. A system for restarting, according to an occurrence of an engine restart request, an internal combustion engine that has been automatically controlled for stopping in response to an engine automatic stop request, the internal combustion engine normally working to burn fuel to rotate a crankshaft with a ring gear attached, the system comprising:
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a starter provided with a motor for rotatably driving an output shaft with a pinion and an actuator working to shift the pinion toward the ring gear to be engaged with the ring gear; a monitor unit working to monitor a rotational speed of the internal combustion engine, the rotational speed of the internal combustion engine dropping by the automatic control for stopping the internal combustion engine; and when the engine restart request occurs with the rotational speed being within a preset range during the rotational speed of the internal combustion engine dropping by the automatic control for stopping the internal combustion engine, a drive unit working to; drive the actuator to shift the pinion toward the ring gear to be engaged with the ring gear without synchronizing a rotational speed of the pinion with the ring gear; and rotatably drive the motor with the pinion being at least partly engaged with the ring gear to thereby crank the crankshaft of the internal combustion engine. - View Dependent Claims (2, 3)
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4. A system for restarting, according to an occurrence of an engine restart request, an internal combustion engine that has been automatically controlled for stopping in response to an engine automatic stop request, the internal combustion engine normally working to burn fuel to rotate a crankshaft with a ring gear attached, the system comprising:
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a starter provided with a motor for rotatably driving an output shaft with a pinion and an actuator working to shift the pinion toward the ring gear to be engaged with the ring gear; a monitor unit working to monitor a rotational speed of the internal combustion engine, the rotational speed of the internal combustion engine dropping by the automatic control for stopping the internal combustion engine; and an executing unit working to; select, based on the rotational speed of the internal combustion engine at a timing of the occurrence of the engine restart request, one of a first restart task and a second restart task; execute, when the first restart task is selected, the first restart task to; rotatably drive the motor, determine whether the pinion is allowed to be rotated with the ring gear, and after it is determined that the pinion is allowed to be rotated with the ring gear, drive the actuator to shift the pinion toward the ring gear to be engaged with the ring gear to crank the crankshaft of the internal combustion engine; and execute, when the second restart task is selected, the second restart task to; drive the actuator to shift the pinion toward the ring gear to be engaged with the ring gear without synchronizing a rotational speed of the pinion with the ring gear, and rotatably drive the motor with the pinion being at least partly engaged with the ring gear to thereby crank the crankshaft of the internal combustion engine. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for restarting, according to an occurrence of an engine restart request, an internal combustion engine that has been automatically controlled for stopping in response to an engine automatic stop request, the internal combustion engine normally working to burn fuel therein to rotate a crankshaft with a ring gear attached, the system comprising:
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a starter provided with a motor for rotatably driving an output shaft with a pinion and an actuator working to shift the pinion toward the ring gear to be engaged with the ring gear; a monitor unit working to monitor a parameter associated with a difference between a rotational speed of the internal combustion engine and a rotational speed of the pinion, the rotational speed of the internal combustion engine dropping by the automatic control for stopping the internal combustion engine, a rotational speed of the internal combustion engine positively and negatively oscillating after the rotational speed of the internal combustion engine has first reached zero; and when the engine restart request occurs at least one of;
during the rotational speed of the internal combustion engine dropping, and during the rotational speed of the internal combustion engine positively and negatively oscillating, after the parameter has been within a preset range, a drive unit working to;drive the actuator to shift the pinion toward the ring gear to be engaged with the ring gear without synchronizing a rotational speed of the pinion with the ring gear; and rotatably drive the motor with the pinion being at least partly engaged with the ring gear to crank the crankshaft of the internal combustion engine. - View Dependent Claims (21, 22)
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23. A system for restarting, according to an occurrence of an engine restart request, an internal combustion engine that has been automatically controlled for stopping in response to an engine automatic stop request, the internal combustion engine normally working to burn fuel therein to rotate a crankshaft with a ring gear attached, the system comprising:
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a starter provided with a motor for rotatably driving an output shaft with a pinion and an actuator working to shift the pinion toward the ring gear to be engaged with the ring gear; a monitor unit working to monitor a parameter associated with a difference between a rotational speed of the internal combustion engine and a rotational speed of the pinion, the rotational speed of the internal combustion engine dropping by the automatic control for stopping the internal combustion engine, a behavior of the rotational speed of the internal combustion engine positively and negatively oscillating after the rotational speed of the internal combustion engine has first reached zero; and when the engine restart request occurs at least one of;
during the rotational speed of the internal combustion engine dropping, and during the rotational speed of the internal combustion engine positively and negatively oscillating, a drive unit working to;rotatably drive the motor to thereby rotate the pinion so that the monitored parameter has been within a preset range; and drive the actuator to shift the pinion toward the ring gear to be engaged with the ring gear without synchronizing a rotational speed of the pinion with the ring gear to thereby crank the crankshaft of the internal combustion engine. - View Dependent Claims (24, 25, 26)
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Specification