Control device of hybrid drive device

• US 8,793,045 B2
• Filed: 02/29/2012
• Issued: 07/29/2014
• Est. Priority Date: 03/25/2011
• Status: Expired due to Fees

• Current Assignee: Aisin AW Company Limited (Aisin Corp.)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.)
• Inventors: Ueda, Yosuke, Ono, Yoshinori, Nomura, Masaki, Kioka, Hiroaki, Shiraishi, Wataru
• Primary Examiner(s): Dager, Jonathan M
• Application Number:
  US13/981,468
• Publication Number:
  US 20130304296A1
• Time in Patent Office: 881 Days
• Field of Search: None
• US Class Current: 701/22
• CPC Class Codes: B60K 2006/4825 Electric machine connected or connectable to gearbox input shaft
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/543 the transmission being a continuously variable transmission
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/04 including control of propulsion units
• 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 10/10 including control of change-speed gearings
• CPC Class Codes: B60W 10/11 Stepped gearings
• 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 20/10 Controlling the power contribution of each of the prime movers to meet required power demand
• CPC Class Codes: B60W 20/15 Control strategies specially adapted for achieving a particular effect
• 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 2710/083 Torque
• CPC Class Codes: B60W 2710/1005 Transmission ratio engaged
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: B60Y 2300/18083 without torque flow between driveshaft and engine, e.g. with clutch disengaged or transmission in neutral
• CPC Class Codes: B60Y 2300/192 : Power-up or power-down of the driveline, e.g. start up of a cold engine
• CPC Class Codes: F16H 15/42 : in which two members co-operate by means of rings or by means of parts of endless flexible members pressed between the first mentioned members
• CPC Class Codes: F16H 61/0213 : characterised by the method for generating shift signals
• CPC Class Codes: Y02T 10/60 : Other road transportation technologies with climate change mitigation effect
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y10S 903/93 : Conjoint control of different elements

Abstract

A hybrid drive device includes a speed change mechanism, a motor drivingly coupled to an input shaft, and a clutch interposed between an engine and an input shaft. Upon engine start during engine traveling, the clutch is engaged, and rotation of the engine is increased. A control device of the hybrid drive device includes start upshift control means that, according to the engagement control of the clutch upon engine start, upshifts the speed change mechanism to output inertia torque. Thus, when the engine is started, output torque as the sum of driving torque of the motor and the inertia torque is output to the driving wheel, which reduces hesitation upon engine start.

Claims

1. A control device of a hybrid drive device, comprising:

a shift control unit that performs shift control of a speed change mechanism shifting a speed ratio between an input member and an output member drivingly coupled to a driving wheel;

a motor control unit that performs drive control of a motor drivingly coupled to the input member;

a clutch control unit that performs engagement control of a clutch interposed between an engine and the input member;

an engine start determination unit that determines that the engine should be started, from a state where the clutch is disengaged during traveling of a vehicle to stop the engine and the vehicle is traveling by driving torque of the motor;

an engine start control unit that, when it is determined by the engine start determination unit that the engine should be started, sends a command to the clutch control unit to perform the engagement control of the clutch and to increase torque capacity of the clutch, thereby increasing a rotational speed of the engine based on rotation of the input member, and starting combustion of the engine; and

a start upshift control unit that, according to the engagement control of the clutch by the engine start control unit, sends a command to the shift control unit to upshift the speed ratio of the speed change mechanism to reduce a rotational speed of the input member, thereby generating inertia torque by the speed change mechanism, wherein

when the engine is started, output torque as a sum of the driving torque of the motor and the inertia torque is output to the driving wheel.

2. The control device of the hybrid drive device according to claim 1, further comprising:

a requested torque detection unit that detects driver'"'"'s requested torque, wherein

the start upshift control unit controls a magnitude of the inertia torque to be generated, by controlling a shift speed in the upshift based on the requested torque and the driving torque of the motor.

3. The control device of the hybrid drive according to claim 1, wherein the speed change mechanism is a stepless speed change mechanism.

4. The control device of the hybrid drive according to claim 2, wherein

the speed change mechanism is a stepless speed change mechanism.