公开(公告)号：US10190481B2

公开(公告)日：2019-01-29

申请号：US14044141

申请日：2013-10-02

Applicant: GM Global Technology Operations LLC

Inventor： Stephen Paul Levijoki ,  Eric E. Klauser ,  John W. Siekkinen

IPC: F01P11/16 ,  F02D43/00 ,  F02D41/00 ,  F02D41/22 ,  F02D17/02

Abstract: A diagnostic system for an engine of a vehicle includes a temperature determination module, a comparison module, and a fault indication module. The temperature determination module receives an indication of whether one or more cylinders within the engine are deactivated and selects a first temperature threshold based on the indication. The comparison module selectively determines whether a temperature of engine coolant is less than the first temperature threshold. The fault indication module diagnoses a fault in response to the comparison module determining that the temperature of the engine coolant is less than the first temperature threshold.

公开(公告)号：US10975857B2

公开(公告)日：2021-04-13

申请号：US16570579

申请日：2019-09-13

Applicant: GM Global Technology Operations LLC

Inventor： Michael A. Smith ,  Eugene V. Gonze ,  Eric E. Klauser ,  Christopher H. Knieper

IPC: F04B49/00 ,  F01P7/14 ,  F04B23/04

Abstract: A method of diagnosing a mechanical coolant pump in an automobile equipped with cooling system having a mechanical coolant pump and an electric coolant pump comprises detecting when an engine of the automobile has been started, dis-engaging the electric coolant pump, engaging the mechanical coolant pump, and verifying the mechanical coolant pump is operating properly.

公开(公告)号：US20210079912A1

公开(公告)日：2021-03-18

申请号：US16570579

申请日：2019-09-13

Applicant: GM Global Technology Operations LLC

Inventor： Michael A. Smith ,  Eugene V. Gonze ,  Eric E. Klauser ,  Christopher H. Knieper

IPC: F04B49/00 ,  F01P7/14 ,  F04B23/04

Abstract: A method of diagnosing a mechanical coolant pump in an automobile equipped with cooling system having a mechanical coolant pump and an electric coolant pump comprises detecting when an engine of the automobile has been started, dis-engaging the electric coolant pump, engaging the mechanical coolant pump, and verifying the mechanical coolant pump is operating properly.