Vehicle, control method and control apparatus for vehicle

• US 8,392,079 B2
• Filed: 03/17/2010
• Issued: 03/05/2013
• Est. Priority Date: 04/09/2009
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Oda, Akira, Ayabe, Atsushi, Asami, Tomohiro
• Primary Examiner(s): Jabr, Fadey
• Assistant Examiner(s): KLEINMAN, LAIL A
• Application Number:
  US13/259,759
• Publication Number:
  US 20120022755A1
• Time in Patent Office: 1,084 Days
• Field of Search: 701/54, 701/58, 701/84, 701/66, 477/107, 477/109, 477/110
• US Class Current: 701/58
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/11 Stepped gearings
• CPC Class Codes: B60W 2510/0638 Engine speed
• CPC Class Codes: B60W 2510/0657 Engine torque
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/16 Ratio selector position
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 2710/1005 Transmission ratio engaged
• CPC Class Codes: B60W 2720/16 Pitch
• CPC Class Codes: B60W 30/20 Reducing vibrations in the driveline
• CPC Class Codes: F02D 29/00 Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
• CPC Class Codes: F16H 2059/147 Transmission input torque, e.g. measured or estimated engine torque
• CPC Class Codes: F16H 2059/148 Transmission output torque, e.g. measured or estimated torque at output drive shaft
• CPC Class Codes: F16H 61/14 Control of torque converter lock-up clutches
• CPC Class Codes: F16H 61/143 using electric control means
• CPC Class Codes: F16H 63/50 Signals to an engine or motor

Abstract

Damping control, by which an engine is controlled to output torque for reducing up-and-down vibrations such as pitching and bouncing of a vehicle, is performed. When the damping control is interrupted, the behavior of engine torque after the damping control is interrupted is predicted. Shift of an automatic transmission is controlled in accordance with the predicted behavior of the engine torque.

Claims

1. A vehicle, comprising:

a driving source;

a transmission coupled to said driving source and capable of changing a gear ratio by shift; and

a control apparatus, wherein

said transmission performs the shift by changing a friction engagement element to be in an engaged state, and

said control apparatus is configured to;

perform damping control by which said driving source is controlled to output torque for reducing up-and-down vibrations of the vehicle,

determine whether or not to perform the shift of said transmission,

interrupt said damping control when determining to perform the shift of said transmission,

predict a time when the output torque of said driving source stabilizes after said damping control is interrupted and magnitude of the output torque of said driving source from when said damping control is interrupted to when the output torque of said driving source stabilizes,

control said transmission to delay a start of the shift until the output torque of said driving source stabilizes after said damping control is interrupted, in a case where the output torque of said driving source stabilizes within a predetermined time period after said damping control is interrupted, and

control said transmission to delay the start of the shift until said predetermined time period elapses since said damping control is interrupted, and controls engagement force of said friction engagement element during the shift of said transmission in accordance with the predicted magnitude of the output torque of said driving source, in a case where the output torque of said driving source does not stabilize within said predetermined time period after said damping control is interrupted.

2. The vehicle according to claim 1, wherein

said control apparatus is configured to predict the time when the output torque of said driving source stabilizes after said damping control is interrupted and the magnitude of the output torque of said driving source from when said damping control is interrupted to when the output torque of said driving source stabilizes, based on an amplitude and a phase of the output torque of said driving source controlled by said damping control at the time of interrupting said damping control.

3. A control apparatus for a vehicle equipped with a driving source and a transmission coupled to said driving source and capable of changing a gear ratio by shift, said transmission performing the shift by changing a friction engagement element to be in an engaged state, and said control apparatus comprising:

damping control means for performing damping control by which said driving source is controlled to output torque for reducing up-and-down vibrations of the vehicle;

means for determining whether or not to perform the shift of said transmission;

interrupting means for interrupting said damping control when determining to perform the shift of said transmission;

predicting means for predicting a time when the output torque of said driving source stabilizes after said damping control is interrupted and magnitude of the output torque of said driving source from when said damping control is interrupted to when the output torque of said driving source stabilizes; and

shift control means for controlling said transmission to delay a start of the shift until the output torque of said driving source stabilizes after said damping control is interrupted, in a case where the output torque of said driving source stabilizes within a predetermined time period after said damping control is interrupted, and controlling said transmission to delay the start of the shift until said predetermined time period elapses since said damping control is interrupted, and controlling engagement force of said friction engagement element during the shift of said transmission in accordance with the predicted magnitude of the output torque of said driving source, in a case where the output torque of said driving source does not stabilize within said predetermined time period after said damping control is interrupted.