Automatic stop/start controller for engine

• US 20040153231A1
• Filed: 01/20/2004
• Published: 08/05/2004
• Est. Priority Date: 01/21/2003
• Status: Active Grant

• Current Assignee: Suzuki Motor Corporation
• Original Assignee: Suzuki Motor Corporation
• Inventors: Noda, Norihiro, Mori, Tatsuji, Itoh, Yoshiki
• Granted Patent: US 7,130,731 B2
• Time in Patent Office: Days
• US Class Current: 701/54
• CPC Class Codes: B60K 2006/268 Electric drive motor starts the engine, i.e. used as starter motor
• CPC Class Codes: B60K 6/485 Motor-assist type
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60W 10/026 of lock-up clutches
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/30 Control strategies involving selection of transmission gear ratio control of change speed gearings, together with other vehicle sub-units B60W10/10; HEV transmission gearing B60K6/36; gearings and control thereof F16H
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: F02D 2400/12 Engine control specially adapted for a transmission comprising a torque converter or for continuously variable transmissions
• CPC Class Codes: F02D 41/0215 in relation with elements of the transmission
• CPC Class Codes: F02N 11/04 the motors being associated with current generators
• CPC Class Codes: F02N 11/0814 comprising means for controlling automatic idle-start-stop
• CPC Class Codes: F02N 2200/0802 Transmission state, e.g. gear ratio or neutral state
• CPC Class Codes: F16H 2059/467 of torque converter
• CPC Class Codes: Y02T 10/40 Engine management systems
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility

Abstract

An automatic stop/start controller having an engine, a motor generator to drive the engine, and an automatic transmission. The automatic stop/start controller permits the engine to stop and start without operation of an ignition key. At start of the engine by not operation of the ignition key and after the engine is started to drive by the motor generator, a control means corrects to increase the torque generated by the motor generator according to the degree of the engagement of frictional engaging elements of the automatic transmission.

Claims

1. An automatic stop/start controller for a vehicle having an engine, a motor generator to drive the engine, and an automatic transmission, said automatic stop/start controller permitting the engine to stop and start without operation of an ignition key, wherein, at start of the engine without operation of the ignition key and after said engine is started to drive by said motor generator, the controller corrects to increase the torque generated by said motor generator according to the degree of engagement of frictional engaging elements of said automatic transmission.

2. The automatic stop/start controller for the engine as defined in claim 1, wherein said controller corrects and increases the torque generated by said motor generator according to opening degree of a throttle valve of said engine.

3. The automatic stop/start controller for the engine as defined in claim 2, wherein said controller determines the degree of engagement of said frictional engaging elements of said automatic transmission by comparison between the engine speed of said engine and the turbine rotational speed of a torque converter of said automatic transmission.

4. The automatic stop/start controller for the engine as defined in claim 2, wherein said controller determines whether the opening degree of said throttle valve is at idle opening degree or non-idle opening degree, and corrects and increases the torque generated by said motor generator according to either the idle or non-idle opening degree.

5. The automatic stop/start controller for the engine as defined in claim 2, wherein said motor generator performs functions of assisting said engine and of power generating at least during running of said vehicle.

6. The automatic stop/start controller for the engine as defined in claim 1, wherein said controller determines the degree of engagement of said frictional engaging elements of said automatic transmission by comparison between the engine speed of said engine and the turbine rotational speed of a torque converter of said automatic transmission.

7. The automatic stop/start controller for the engine as defined in claim 1, wherein said motor generator performs functions of assisting said engine and of power generating at least during running of said vehicle.