US 7,079,939 B2Granted

Stop position estimating apparatus of internal combustion engine

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsKenji Kataoka, Yasushi Kusaka

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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.

Claims8

Dependent claims

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, 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.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/758,101Filed 16 Jan 2004
Priority: JP 2003-01903728 Jan 2003
Published: US 2004/0153235 A15 Aug 2004
Granted: 18 Jul 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification26 codes

B60W 10/08
Including control of propulsion units: including control of electric propulsion units, e.g. motors or generators
B60K 6/485
Parallel type: motor-assist type
B60L 15/20
Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles: for control of the vehicle or its…
B60L 50/16
Using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines: with provision for separate direct…

Family

US 2004/0153235 A1Pre-grant publication · published 5 Aug 2004
US 7,079,939 B2This patent

From the US filing history. Foreign family members aren’t listed.

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