Vehicle control apparatus for controlling the drive force of the vehicle

• US 9,365,110 B2
• Filed: 03/12/2013
• Issued: 06/14/2016
• Est. Priority Date: 03/13/2012
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Matsuda, Takashi, Hamane, Shouta, Hattori, Motoyuki, Mori, Kouichi
• Primary Examiner(s): Cronin, Stephen K
• Assistant Examiner(s): STAUBACH, CARL C
• Application Number:
  US13/795,440
• Publication Number:
  US 20130245923A1
• Time in Patent Office: 1,190 Days
• Field of Search: 701/93, 701/94, 701/103, 701/104, 701/110, 701/112, 123/179.4, 123/198.DC, 73/13.7, 73/13.8, 731/140.5, 731/141.2, 735/03
• US Class Current: 1/1
• CPC Class Codes: B60K 23/00 Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for movable cabs having special adaptations of vehicle control devices B62D33/06; such control devices per se F16D, F16H
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/101 Infinitely variable gearings
• 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: B60W 2520/105 Longitudinal acceleration
• CPC Class Codes: B60W 2552/15 Road slope, i.e. the inclination of a road segment in the longitudinal direction
• CPC Class Codes: B60W 30/18072 Coasting
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

While a vehicle speed is between a first certain vehicle speed and a second certain vehicle speed lower than the first certain vehicle speed, it is determined whether to perform vehicle control in accordance with conditions excluding a condition based on the estimated road surface slope.

Claims

1. A vehicle control apparatus comprising:

an acceleration detecting unit configured to detect a forward/backward acceleration of a vehicle;

a road surface slope estimating unit configured to estimate a road surface slope based on the detected forward/backward acceleration; and

a vehicle control unit configured to perform vehicle control to reduce a drive force of the vehicle during a vehicle running condition where a vehicle speed is greater than zero, when certain conditions are met, the certain conditions including a condition based on the estimated road surface slope, wherein the vehicle control unit determines whether or not to perform the vehicle control while the vehicle speed is between a first vehicle speed and a second vehicle speed that is lower than the first vehicle speed based on conditions, wherein the conditions exclude the certain condition based on the estimated road surface slope.

2. The vehicle control apparatus according to claim 1, wherein the second vehicle speed is set in a low-vehicle-speed region where the vehicle will roll down a slope if the vehicle control is performed.

3. The vehicle control apparatus according to claim 1, wherein the first vehicle speed is set in a vehicle speed region where the vehicle will not roll down a slope if the vehicle control is performed.

4. The vehicle control apparatus according to claim 1, wherein the first vehicle speed is set using a time period required for a speed of the vehicle to reduce to the second vehicle speed from the first vehicle speed, deceleration of the vehicle estimated when the vehicle control is not performed during the time period, and the second vehicle speed.

5. A vehicle control apparatus comprising:

means for detecting a forward/backward acceleration of a vehicle;

means for estimating a road surface slope based on the detected forward/backward acceleration; and

means for performing vehicle control to reduce a drive force of the vehicle during a vehicle running condition where a vehicle speed is greater than zero, when certain conditions are met, the certain conditions including a condition based on the estimated road surface slope are met, wherein the means for performing vehicle control determines whether or not to perform the vehicle control while the vehicle speed is between a first vehicle speed and a second vehicle speed lower than the first vehicle speed based on certain conditions, wherein the certain conditions exclude the condition based on the estimated road surface slope.