Invention Grant
- Patent Title: Diagnostic method for multiple speed relay-controlled electric fan
- Patent Title (中): 多速继电器控制电风扇诊断方法
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Application No.: US14095845Application Date: 2013-12-03
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Publication No.: US09562933B2Publication Date: 2017-02-07
- Inventor: Troy Fischer , Jayne Froney , Randall J. Houston , Brian D. Rutkowski
- Applicant: Ford Global Technologies, LLC
- Applicant Address: US MI Dearborn
- Assignee: Ford Global Technologies, LLC
- Current Assignee: Ford Global Technologies, LLC
- Current Assignee Address: US MI Dearborn
- Agency: Alleman Hall McCoy Russell & Tuttle LLP
- Agent Julia Voutyras
- Main IPC: G01R31/02
- IPC: G01R31/02 ; G01R19/165 ; G01R31/00 ; G01M15/04 ; F01P5/14 ; F01P11/18
Abstract:
Methods and systems are described for diagnosing a multiple speed, relay controlled engine cooling fan system. One method includes measuring the change in current drawn from a battery-alternator system when fan speed is modified. A degradation in cooling fan operation is flagged when measured current change differs from an expected change.
Public/Granted literature
- US20150152776A1 DIAGNOSTIC METHOD FOR MULTIPLE SPEED RELAY-CONTROLLED ELECTRIC FAN Public/Granted day:2015-06-04
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