Vehicle control device

• US 9,162,676 B2
• Filed: 12/16/2011
• Issued: 10/20/2015
• Est. Priority Date: 12/16/2011
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Eto, Shingo, Inoue, Yuji, Ideshio, Yukihiko, Michikoshi, Yousuke, Miyazaki, Terufumi, Sato, Akihiro
• Primary Examiner(s): BUTLER, RODNEY ALLEN
• Application Number:
  US14/365,864
• Publication Number:
  US 20140379189A1
• Time in Patent Office: 1,404 Days
• US Class Current: 1/1
• CPC Class Codes: B60K 6/387 Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• 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 2030/1809 Without torque flow between driveshaft and engine, e.g. with clutch disengaged or transmission in neutral
• CPC Class Codes: Y02T 10/60 Other road transportation technologies with climate change mitigation effect
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

A control device of a vehicle comprises: an electric motor connected to a drive force transmission path through a first connecting/disconnecting device connecting/interrupting power transmission; and an engine connected to the electric motor through a second connecting/disconnecting device connecting/interrupting power transmission, the control device of a vehicle disconnecting the first connecting/disconnecting device or the second connecting/disconnecting device during running to perform coasting with the engine separated, when performing coasting, a determination whether a vehicle speed is equal to or lower than a predetermined determination vehicle speed implemented, the engine separated by disconnecting the second connecting/disconnecting device with the first connecting/disconnecting device kept connected at a low vehicle speed where the vehicle speed is equal to or lower than the predetermined determination vehicle speed, and the engine separated by disconnecting the first connecting/disconnecting device at a high vehicle speed where the vehicle speed is higher than the predetermined determination vehicle speed.

Claims

1. A control device of a vehicle comprising:

an electric motor connected to a drive force transmission path through a first connecting/disconnecting device connecting/interrupting power transmission; and

an engine connected to the electric motor through a second connecting/disconnecting device connecting/interrupting power transmission,

the control device of a vehicle disconnecting either the first connecting/disconnecting device or the second connecting/disconnecting device during running to perform coasting with the engine separated,

when performing coasting, a determination whether a vehicle speed is equal to or lower than a predetermined determination vehicle speed being implemented,

the engine being separated by disconnecting the second connecting/disconnecting device with the first connecting/disconnecting device kept connected at a low vehicle speed in which the vehicle speed is equal to or lower than the predetermined determination vehicle speed, and

the engine being separated by disconnecting the first connecting/disconnecting device at a high vehicle speed in which the vehicle speed is higher than the predetermined determination vehicle speed.

2. The control device of a vehicle of claim 1, comprising a mechanical oil pump between the electric motor and the first connecting/disconnecting device, wherein

the mechanical oil pump is rotationally driven by the electric motor during coasting at the high vehicle speed with the first connecting/disconnecting device disconnected.

3. The control device of a vehicle of claim 1, comprising a fluid power transmission device with a lockup clutch between the electric motor and the first connecting/disconnecting device, wherein

the lockup clutch is maintained in an engaged state during coasting at the low vehicle speed with the second connecting/disconnecting device disconnected.

4. The control device of a vehicle of claim 2, comprising a fluid power transmission device with a lockup clutch between the electric motor and the first connecting/disconnecting device, wherein

the mechanical oil pump is disposed between an output side rotating member of the fluid power transmission device and the first connecting/disconnecting device, and wherein

the mechanical oil pump is rotationally driven by the electric motor with the lockup clutch maintained in an engaged state during coasting at the high vehicle speed with the first connecting/disconnecting device disconnected.