US 11,486,344 B2Granted

Engine glow plug disconnection detection method

AssigneesHyundai Motor Company, Kia Motors Corporation

InventorsJeong Sang Oh, Jin Ho Kim, Jang Su Kim

Life of this patent

Estimating the term…

Loading patent…

Abstract

An engine glow plug disconnection detection method may include: increasing, by a controller, temperature of a plurality of glow plugs by performing a rapid temperature increase mode when an engine start signal of a vehicle is recognized by the controller; determining whether the glow plugs are disconnected and the number of disconnections using an engine start early-stage voltage of the vehicle and a voltage of the vehicle when the rapid temperature increase mode is performed, by the controller; recognizing, by the controller, cylinders of an engine with at least a disconnected glow plug upon determining that one or more glow plugs are disconnected: and storing, by the controller, a number of disconnected glow plugs and information related to corresponding cylinders.

Claims12

Dependent claims

An engine glow plug disconnection detection method comprising:

increasing, by a controller, temperature of a plurality of glow plugs by performing a rapid temperature increase mode when an engine start signal of a vehicle is recognized by the controller;
determining, by the controller, whether the plurality of glow plugs is disconnected and a number of disconnections using an engine start early-stage voltage of the vehicle and a voltage of the vehicle when the rapid temperature increase mode is performed;
recognizing, by the controller, cylinders of an engine with at least a glow plug upon determining that the at least a glow plug among the plurality of glow plugs is disconnected:
and
storing, by the controller, a number of the at least a disconnected glow plug and information related to corresponding cylinders,
wherein the controller is configured to determine a cylinder at which a revolutions per minute (RPM) deviation of an engine RPM sensor signal is out of a predetermined range as a cylinder having a disconnected glow plug,
wherein the controller is configured to determine whether the number of the at least a disconnected glow plug is a same as a number of cylinders at which the RPM deviation is out of the predetermined range, and is configured to store the number of the at least a disconnected glow plug and information related to corresponding cylinders when the number of the at least a disconnected glow plug and the number of cylinders are a same, and
wherein when the number of the at least a disconnected glow plug is not the same as the number of cylinders at which the RPM deviation is out of the predetermined range, the controller is configured to store information indicating that the at least a glow plug of all cylinders in the engine has been disconnected.

5 more elements

An engine glow plug disconnection detection system comprising:

a crank speed sensor configured to detect a revolution per minute (RPM) of a crankshaft in an engine;
and
a controller including a processor and connected to the crank speed sensor and configured of receiving a signal of the RPM from the crank speed sensor,
wherein the controller is configured:
to increase temperature of a plurality of glow plugs by performing a rapid temperature increase mode when an engine start signal of a vehicle is recognized by the controller;
to determine whether the plurality of glow plugs are disconnected and a number of disconnections using an engine start early-stage voltage of the vehicle and a voltage of the vehicle when the rapid temperature increase mode is performed;
to recognize cylinders of an engine with at least a glow plug upon determining that the at least a glow plug among the plurality of glow plugs is disconnected:
and
storing a number of the at least a disconnected glow plug and information related to corresponding cylinders,
wherein the controller is configured to determine a cylinder at which a revolutions per minute (RPM) deviation of the signal is out of a predetermined range as a cylinder having a disconnected glow plug,
wherein the controller is configured to determine whether the number of the at least a disconnected glow plug is a same as a number of cylinders at which the RPM deviation is out of the predetermined range, and is configured to store the number of the at least a disconnected glow plug and information related to corresponding cylinders when the number of the at least a disconnected glow plug and the number of cylinders are a same, and
wherein when the number of the at least a disconnected glow plug is not the same as the number of cylinders at which the RPM deviation is out of the predetermined range, the controller is configured to store information indicating that the at least a glow plug of all cylinders in the engine has been disconnected.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/165,634Filed 2 Feb 2021
Priority: KR 10-2020-01122603 Sep 2020
Published: US 2022/0065213 A13 Mar 2022
Granted: 1 Nov 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F02P 19/027
Electric, e.g. layout of circuits of apparatus having glowing plugs: safety devices, e.g. for diagnosing the glow plugs or the related circuits
F02D 41/1498
With detection of the mechanical response of the engine: measuring engine roughness
F02D 2200/101
Parameters related to the engine output, e.g. engine torque or engine speed: engine speed
F02N 2200/022
Said parameters being related to the engine: engine speed