Method for controlling a glow plug for diesel engine
First Claim
1. 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.
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Accused Products
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.
22 Citations
11 Claims
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1. 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:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification