Stop position estimating apparatus of internal combustion engine
First Claim
1. A stop position estimating apparatus of an internal combustion engine comprising:
- a motor generator having a function of at least one of a motor and a generator interlocked with a crankshaft of the internal combustion engine;
a first detecting unit for detecting a rotation position of the motor generator;
a second detecting unit for detecting a crank angle of the crankshaft;
a rotation direction detecting unit for detecting a rotation direction of the internal combustion engine based on the rotation position detected by the first detecting unit, andan estimating unit for estimating a stop position of the internal combustion engine based on the rotation position of the motor generator and the crank angle, wherein the estimating unit estimates the stop position of the internal combustion engine based on the crank angle generated by counting a number of crank pulses in the rotation direction of the internal combustion engine detected by the rotation direction detecting unit.
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Accused Products
Abstract
A stop position control apparatus of an internal combustion engine is applied to a vehicle having of a motor or a generator connected to a crankshaft of the engine, such as an economic-running vehicle and a hybrid vehicle. A rotation position of a motor generator is detected by a motor angle sensor, and a crank angle of the engine is detected by a crank angle sensor. A stop position of the internal combustion engine, at the time of stoppage is estimated based on the rotation position of the motor generator and the crank angle. By utilizing the results, the stop position of the internal combustion engine can be accurately estimated. By detecting a rotation direction of the crankshaft, the stop position of the engine can be accurately estimated even when the engine is rotated in the reverse direction at the time of the engine stopping.
36 Citations
8 Claims
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1. A stop position estimating apparatus of an internal combustion engine comprising:
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a motor generator having a function of at least one of a motor and a generator interlocked with a crankshaft of the internal combustion engine; a first detecting unit for detecting a rotation position of the motor generator; a second detecting unit for detecting a crank angle of the crankshaft; a rotation direction detecting unit for detecting a rotation direction of the internal combustion engine based on the rotation position detected by the first detecting unit, and an estimating unit for estimating a stop position of the internal combustion engine based on the rotation position of the motor generator and the crank angle, wherein the estimating unit estimates the stop position of the internal combustion engine based on the crank angle generated by counting a number of crank pulses in the rotation direction of the internal combustion engine detected by the rotation direction detecting unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification