Method for disengaging hydraulic park without engine power

US10703369B2 · kind B2 · utility

Assignee

• Ford Global Technologies, LLC · US

Inventors

• Richard Reynolds Hathaway · Livonia, US
• Jeffrey James Tumavitch · Livonia, US
• Than Pham · Nuremberg, DE
• Joseph Scott Slayton · Macomb Township, US
• Markian Oleh Diakiw · Livonia, US

Key dates

• Filing date: Aug 21, 2018
• Grant date: Jul 7, 2020
• Expiry date: Jan 2, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60W2710/188
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

In a special operating mode, a controller is programmed to disengage a hydraulically actuated park mechanism without use of engine power. The starter motor is used to rotate the engine-driven pump at sufficient speed to command disengagement of Park. Once park is disengaged, a holding pin is used to maintain the out of park condition without hydraulic pressure or flow.