Vehicle control device and control method

Patent metadata

Field	Value
Publication number	US-9534687-B2
Application number	US-201414907642-A
Country	US
Kind code	B2
Filing date	May 15, 2014
Priority date	Jul 29, 2013
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

A vehicle control device has a controller configured to control a hydraulic pressure required for shifting of a sub-transmission based on an input torque to the sub-transmission during the coordinated shift, and to execute limitation processing in which, when an instruction to execute specific control causing fluctuation in the input torque to the sub-transmission during the coordinated shift is issued, execution of the specific control is prohibited or the specific control is executed by limiting a control amount.

First claim

The invention claimed is:

1. A vehicle control device, adapted to control a vehicle, including a continuously variable transmission and a stepped sub-transmission on a power transmission path from a power source to a driving wheel and executing coordinated shift in which, when the sub-transmission is to be shifted, a speed ratio of the continuously variable transmission is changed in a direction opposite to a changing direction of a speed ratio of the sub-transmission and suppressing a change in a speed ratio of the continuously variable transmission and the sub-transmission in entirety, the vehicle control device comprising:
a controller configured to:
control a hydraulic pressure required for shifting of the sub-transmission based on an input torque to the sub-transmission during the coordinated shift, and
execute limitation processing in which, when an instruction to execute specific control causing fluctuation in the input torque to the sub-transmission during the coordinated shift is issued, execution of the specific control is prohibited or the specific control is executed by limiting a control amount.

2. The vehicle control device according to claim 1 , wherein the controller executes the limitation processing until the coordinated shift is finished and does not execute the limitation processing after the coordinated shift is finished.

3. The vehicle control device according to claim 2 , wherein the controller resumes the specific control which was prohibited or to recover the control amount which was limited after the coordinated shift is finished.

4. The vehicle control device according to claim 3 , wherein, when there are a plurality of the specific controls to be resumed or whose limited control amounts are to be recovered after the coordinated shift is finished, the controller shifts timing of resumption or recovery of the control amounts from each other.

5. A vehicle control method of a vehicle including a continuously variable transmission and a stepped sub-transmission on a power transmission path from a power source to a driving wheel and executing coordinated shift in which, when the sub-transmission is to be shifted, a speed ratio of the continuously variable transmission is changed in a direction opposite to a changing direction of a speed ratio of the sub-transmission and suppressing a change in a speed ratio of the continuously variable transmission and the sub-transmission in entirety, the vehicle control method comprising:
controlling a hydraulic pressure required for shifting of the sub-transmission based on an input torque to the sub-transmission during the coordinated shift; and
executing limitation processing in which, when an instruction to execute specific control causing fluctuation in the input torque to the sub-transmission during the coordinated shift is issued, execution of the specific control is prohibited or the specific control is executed by limiting a control amount.

6. A vehicle control device, adapted to control a vehicle, including a continuously variable transmission and a stepped sub-transmission on a power transmission path from a power source to a driving wheel and executing coordinated shift in which, when the sub-transmission is to be shifted, a speed ratio of the continuously variable transmission is changed in a direction opposite to a changing direction of a speed ratio of the sub-transmission and suppressing a change in a speed ratio of the continuously variable transmission and the sub-transmission in entirety, comprising:
hydraulic pressure control means for controlling a hydraulic pressure required for shifting of the sub-transmission based on an input torque to the sub-transmission during the coordinated shift; and
limitation processing means for executing limitation processing in which, when an instruction to execute specific control causing fluctuation in the input torque to the sub-transmission during the coordinated shift is issued, execution of the specific control is prohibited or the specific control is executed by limiting a control amount.

Assignees

• Nissan Motor

Inventors

• Onozato Naoya
• Iriyama Masahiro

Classifications

• F16H61/702 Primary

  using electric or electrohydraulic control means · CPC title

• F16H61/66259

  using electrical or electronical sensing or control means · CPC title

• B60W10/06

  including control of combustion engines · CPC title

• F16H59/74

  Inputs being a function of engine parameters (F16H59/14 takes precedence) · CPC title

• B60W10/107

  with endless flexible members · CPC title