Method for controlling a glow plug for diesel engine
AssigneeHyundai Motor Company
InventorJae-Yoon Jung
Life of this patent
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Abstract
For the purpose of precisely controlling a power supply to the glow plug and thereby reducing unnecessary power consumption, and stopping a control logic for a time when a battery voltage is low and thereby preventing a engine stall, the present invention provides a method for dividing an engine starting step into a cranking step and an idling step, controlling power supplied to the glow plug, and operating the glow plug even after successfully entering into a running state in the case of entering into an abnormal engine state based on an amount of injected fuel, an engine speed and a coolant temperature, and thereby controlling the glow plug from before the engine starts through after it is running.
Claims11
A method for controlling a glow plug of an engine, said engine being cooled by a coolant and receiving an injected fuel, said method comprising:
- (a) applying power to the glow plug using a battery;
- (b) maintaining the application of power until a first condition is satisfied, the first condition being that either an elapsed time of the application of power exceeds a predetermined initial preheating time or the engine is cranked;
- (c) maintaining the application of power to the glow plug until a second condition is satisfied, the second condition being that either the elapsed time of the application of power exceeds a predetermined main preheating time, the engine starts idling, or a temperature of such coolant is higher than a predetermined target value;
- (d) cutting off the power to the glow plug;
- and
- (e) after step (d), preheating the glow plug when an amount of such injected fuel is greater than a predetermined fuel injection reference amount or a speed of the engine is greater than a predetermined reference engine speed.
Dependencies are inferred from the claim text.