Invention Grant
US09228482B2 System and method for diagnosing a fault in a switchable water pump for an engine based on a change in crankshaft speed
有权
基于曲轴速度的变化来诊断发动机的可切换水泵中的故障的系统和方法
- Patent Title: System and method for diagnosing a fault in a switchable water pump for an engine based on a change in crankshaft speed
- Patent Title (中): 基于曲轴速度的变化来诊断发动机的可切换水泵中的故障的系统和方法
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Application No.: US13606565Application Date: 2012-09-07
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Publication No.: US09228482B2Publication Date: 2016-01-05
- Inventor: Stephen Paul Levijoki
- Applicant: Stephen Paul Levijoki
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Main IPC: F04B49/06
- IPC: F04B49/06 ; F01P5/14 ; F04B49/02 ; F04B51/00
Abstract:
A system according to the principles of the present disclosure includes a pump control module and a pump diagnostic module. The pump control module commands a water pump to switch between on and off, wherein the water pump circulates coolant through an engine when the water pump switches on as commanded. The pump diagnostic module diagnoses a fault in the water pump based on a change in a crankshaft speed of the engine when the water pump is commanded to switch between on and off.
Public/Granted literature
Information query
