US 7,114,484 B2Granted

Drive apparatus, control method thereof, and motor vehicle equipped with the apparatus and the method

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsKeiji Kaita, Shinichi Abe, Satoshi Kaneko

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Abstract

Provided herein are a drive apparatus that includes an internal combustion engine capable of operating with a high expansion ratio by reducing an effective compression ratio through advancement of an intake valve closing timing, and a control method of the drive apparatus, and a motor vehicle equipped with the apparatus and method. The drive apparatus further includes a torque output device capable of outputting a torque to an output shaft of the internal combustion engine. Upon a command to stop operation of the internal combustion engine, the apparatus controls the driving of the torque output device so that the internal combustion engine stops at a target stop position which is set outside a region that leads to an increased compression ration in an initial compression stroke when the internal combustion engine is next stated.

Claims11

Dependent claims

A control method of a drive apparatus having an internal combustion engine that operates with a high expansion ratio by reducing an effective compression ratio through advancement of an intake valve closing timing, and a torque output device capable of outputting a torque to an output shaft of the internal combustion engine, comprising the steps of:

detecting a stop of operation of the internal combustion engine;
applying a torque to the output shaft of the internal combustion engine via the torque output device;
and
controlling driving of the torque output device so that the internal combustion engine stops at a target stop position which is set outside a region that leads to an increased compression ratio in an initial compression stroke when the internal combustion engine is next started;
wherein the driving of the torque output device is controlled so that the internal combustion engine stops at a target stop position set outside a region in which an intake gas in a cylinder is expanded after closure of an intake valve until start of compression of the intake gas;
wherein the driving of the torque output device is controlled so that the internal combustion engine stops at a target stop position that is a predetermined angle apart from a bottom dead center of the initial compression stroke when the internal combustion engine is next started;
wherein the driving of the torque output device is controlled so that the internal combustion engine stops at a target stop position which is set at or near a position of intake valve closure that immediately precedes the initial compression stroke, or which is set at or near a position that is substantially symmetric to the position of intake valve closure with respect to a vertical straight line passing through a bottom dead center;
and
wherein the driving of the torque output device is controlled so that the internal combustion engine stops, and then moves to the target stop position of the internal combustion engine.

6 more elements

A drive apparatus having an internal combustion engine that operates with a high expansion ratio by reducing an effective compression ratio through advancement of an intake valve closing timing, comprising:

a torque output device capable of outputting a torque to an output shaft of the internal combustion engine;
and
a controller that, upon a command to stop operation of the internal combustion engine, controls driving of the torque output device so that the internal combustion engine stops at a target stop position which is set outside a region that leads to an increased compression ratio in an initial compression stroke when the internal combustion engine is next started;
wherein the controller controls the driving of the torque output device so that the internal combustion engine stops at a target stop position set outside a region in which an intake gas in a cylinder is expanded after closure of an intake valve until start of compression of the intake gas;
wherein the controller controls the driving of the torque output device so that the internal combustion engine stops at a target stop position that is a predetermined angle apart from a bottom dead center of the initial compression stroke when the internal combustion engine is next started;
wherein the controller controls the driving of the torque output device so that the internal combustion engine stops at a target stop position which is set at or near a position of intake valve closure that immediately precedes the initial compression stroke, or which is set at or near a position that is substantially symmetric to the position of intake valve closure with respect to a vertical straight line passing through a bottom dead center;
and
wherein the controller controls the driving of the torque output device so that the internal combustion engine stops, and then moves to the target stop position of the internal combustion engine.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/945,998Filed 22 Sep 2004
Priority: JP 2003-33808329 Sep 2003
Published: US 2005/0066933 A131 Mar 2005
Granted: 3 Oct 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

F02D 13/0234
Variable control of the intake valves only: changing the valve timing only
B60K 6/445
Series-parallel type: differential gearing distribution type
B60W 10/06
Including control of propulsion units: including control of combustion engines
F02D 13/0269
During engine operation: controlling the valves to perform a Miller-Atkinson cycle