HYBRID VEHICLE CONTROL DEVICE

• US 20130231815A1
• Filed: 10/21/2011
• Published: 09/05/2013
• Est. Priority Date: 10/22/2010
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Tanishima, Kaori, Kawamura, Hiroaki, Yamanaka, Fumihiro
• Granted Patent: US 8,868,276 B2
• Time in Patent Office: Days
• US Class Current: 701/22
• CPC Class Codes: B60K 6/36 characterised by the transmission gearings
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60L 15/2009 for braking
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2220/14 Synchronous machines
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/441 Speed
• CPC Class Codes: B60L 2240/443 Torque
• CPC Class Codes: B60L 2240/461 Speed
• CPC Class Codes: B60L 2240/486 Operating parameters
• CPC Class Codes: B60L 2240/507 Operating parameters
• CPC Class Codes: B60L 2270/145 Structure borne vibrations
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• 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 10/11 Stepped gearings
• CPC Class Codes: B60W 10/115 with planetary gears
• 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 20/20 : Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration
• 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 20/40 : Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers power-up or power-down of the driveline B60W30/192
• CPC Class Codes: B60W 2556/00 : Input parameters relating to data
• CPC Class Codes: B60W 30/19 : Improvement of gear change, e.g. by synchronisation or smoothing gear shift
• CPC Class Codes: B60W 30/192 : Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 : Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility
• CPC Class Codes: Y02T 10/84 : Data processing systems or methods, management, administration
• CPC Class Codes: Y10S 903/93 : Conjoint control of different elements

Abstract

A hybrid vehicle control device is provided with an engine, a motor and a mode switch section, an automatic transmission and a controller. The controller outputs the gear shift command prior to an engine start command when a simultaneous output prediction condition is met that predicts the output of a gear shift request and a start request at the same time. In this way, the generation of a large shock by the entering of the engine start in the start prohibiting region during the gear shift is prevented.

Claims

1. A control device of the hybrid vehicle comprising:

an engine;

a motor operatively arranged between the engine and a drive wheel and starts the engine to drive the drive wheel;

a mode switch section disposed between the engine and the motor switches a mode between a hybrid vehicle mode, in which the engine and the motor are acting as driving sources, and an electrically driven vehicle mode, in which only the motor is acting as a driving source;

an automatic transmission disposed between the motor and the drive wheel, and including a plurality of gear-shift steps with different gear-shift ratios; and

a control system programmed to start the engine based on a start request when mode transition takes place from the electrically driven vehicle mode to the hybrid vehicle mode based on the start request, and that, at the same time, carries out gear shift control for transition of a gear-shift step of the automatic transmission from a current gear-shift step to a requested gear-shift step based on a gear shift request;

the control system is further programmed to output a gear shift command prior to an engine start command when a simultaneous output prediction condition, which predicts the simultaneous output of the gear shift request and the start request at the same time, is met, and when the gear-shift command priority permission condition without the engine start request command is met; and

the controller is further programmed to move out of the start prohibiting region during the gear-shift control, turned off a start prohibiting flag and output the engine start command under a condition that the engine start request exists, after the priority gear-shift command is output,

3. The hybrid vehicle control device according to claim 1, wherein

the control system includes a start prohibiting flag priority control section, which is programmed to turn on the start prohibiting flag prior to a gear shift prohibiting flag when the simultaneous output prediction condition that predicts the simultaneous output of the gear shift request and the start request at the same time is not met, while the simultaneous output prohibiting permission condition that has the gear-shift request as a priority and without the engine start request in the preprocess is met, and which is programmed to turns off the start prohibiting flag when the torque phase has ended under the gear-shift control after the start prohibiting flag is turned on.

4. The hybrid vehicle control device according to claim 1, wherein

the control system includes an engine start controller and a gear shift controller configured to exchange information by communication;

and

the control system includes a simultaneous process prohibiting control section which is programmed to output again the start command or the gear shift command that was cancelled at a time corresponding to a time delay in the communication when the simultaneous output prediction condition that predicts the simultaneous output of the gear shift request and the start request at the same time is not met, and the start prohibiting priority permission condition that permits the priority of the start prohibiting flag is also not met, and when the engine start control and the gear shift control occur at the same time.

2. (canceled)

5. The hybrid vehicle control device according to claim 2, wherein

the control system includes an engine start controller and a gear shift controller configured to exchange information by communication;

and

the control system includes a simultaneous process prohibiting control section which is programmed to output again the start command or the gear shift command that was cancelled at a time corresponding to a time delay in the communication when the simultaneous output prediction condition that predicts the simultaneous output of the gear shift request and the start request at the same time is not met, and the start prohibiting priority permission condition that permits the priority of the start prohibiting flag is also not met, and when the engine start control and the gear shift control occur at the same time.