Brake control for stop/start vehicle

• US 9,731,722 B2
• Filed: 04/20/2015
• Issued: 08/15/2017
• Est. Priority Date: 04/20/2015
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Korte, Chad Michael, Pebley, Kirk, Khafagy, Hafiz Shafeek
• Primary Examiner(s): Hlavka, David J
• Application Number:
  US14/691,015
• Publication Number:
  US 20160304096A1
• Time in Patent Office: 848 Days
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/184 with wheel brakes
• CPC Class Codes: B60W 2040/0881 Seat occupation; Driver or passenger presence
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 2540/16 Ratio selector position
• CPC Class Codes: B60W 2552/15 Road slope, i.e. the inclination of a road segment in the longitudinal direction
• CPC Class Codes: B60W 30/18109 Braking
• CPC Class Codes: B60W 30/18118 Hill holding
• CPC Class Codes: B60W 40/076 Slope angle of the road
• CPC Class Codes: B60W 50/14 Means for informing the driver, warning the driver or prompting a driver intervention
• CPC Class Codes: F02N 11/0818 Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
• CPC Class Codes: F02N 2200/0801 Vehicle speed
• CPC Class Codes: F02N 2200/0807 Brake booster state
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

A vehicle includes an engine having auto-stop and auto-start conditions. The vehicle additionally includes a braking system having an auto-hold function. The auto-hold function is configured to, after braking the vehicle to a full stop, automatically apply braking torque independent of a brake pedal position. The vehicle further includes a controller configured to, in response to the engine being in the auto-stop condition, the auto-hold function automatically applying braking torque, and a gear shifter being moved out of a gear other than PARK, maintain the engine in the auto-stop condition.

Claims

1. A vehicle comprising:

an engine;

a braking system having an auto-hold function configured to, after braking the vehicle to a full stop, automatically apply braking torque independent of a brake pedal position; and

a controller configured to, responsive to an auto-stop condition of the engine being active, the auto-hold function automatically applying braking torque, and a gear shifter being moved out of PARK, control the engine to auto-start.

2. The vehicle of claim 1, wherein the auto-start is controlled before the gear shifter reaches a final position.

3. The vehicle of claim 1, wherein the controller is further configured to maintain the auto-stop condition when a brake pedal is released.