Energization control apparatus for glow plug
First Claim
1. An energization control apparatus for a glow plug, comprising:
- a battery;
a glow plug having a low rated voltage which allows rapid heating at a low battery voltage during cranking of a diesel engine in a severe wintertime condition;
power control means, arranged between said battery and said glow plug, for controlling a power supplied to said glow plug; and
energization control means for controlling said power control means so as to control a root-mean-square value of a voltage applied to said glow plug to be equal to the low rated voltage when a voltage applied to said glow plug at the start of the diesel engine is detected to be higher than the low battery voltage, wherein said energization control means controls a duty ratio for controlling an ON/OFF operation of said power control means, and said energization control means comprises;
first and second timers started in association with a key switch operation, said first timer setting a rapid heating time at an initial period of energization;
reference voltage setting means controlled in accordance with an output from said first timer;
battery voltage detecting means; and
duty ratio control means for controlling the duty ratio for controlling the ON/OFF operation of said power control means,said first timer counting a time shorter than that of said second timer,said second timer setting an after glow time, andsaid reference voltage setting means changing the reference voltage by an ON/OFF operation of said first timer.
1 Assignment
0 Petitions
Accused Products
Abstract
An energization control apparatus for a glow plug includes a battery, a glow plug, a power control unit, and an energization controller. The glow plug has a low rated voltage which allows rapid heating at a low battery voltage during cranking of a diesel engine in a severe wintertime condition. The power control unit is arranged between the battery and the glow plug to control a power supplied to the glow plug. The energization controller controls the power control unit so as to equalize a root-mean-square value of a voltage applied to the glow plug to be the low rated voltage when a voltage applied to the glow plug at the start of the diesel engine is detected to be higher than the low battery voltage.
-
Citations
9 Claims
-
1. An energization control apparatus for a glow plug, comprising:
-
a battery; a glow plug having a low rated voltage which allows rapid heating at a low battery voltage during cranking of a diesel engine in a severe wintertime condition; power control means, arranged between said battery and said glow plug, for controlling a power supplied to said glow plug; and energization control means for controlling said power control means so as to control a root-mean-square value of a voltage applied to said glow plug to be equal to the low rated voltage when a voltage applied to said glow plug at the start of the diesel engine is detected to be higher than the low battery voltage, wherein said energization control means controls a duty ratio for controlling an ON/OFF operation of said power control means, and said energization control means comprises; first and second timers started in association with a key switch operation, said first timer setting a rapid heating time at an initial period of energization; reference voltage setting means controlled in accordance with an output from said first timer; battery voltage detecting means; and duty ratio control means for controlling the duty ratio for controlling the ON/OFF operation of said power control means, said first timer counting a time shorter than that of said second timer, said second timer setting an after glow time, and said reference voltage setting means changing the reference voltage by an ON/OFF operation of said first timer. - View Dependent Claims (2, 3)
-
-
4. An energization control apparatus for a glow plug, comprising:
-
a battery; a glow plug having a low rated voltage which allows rapid heating at a low battery voltage during cranking of a diesel engine in a severe wintertime condition; power control means, arranged between said battery and said glow plug, for controlling a power supplied to said glow plug; energization control means for controlling said power control means so as to control a root-mean-square value of a voltage applied to said glow plug to be equal to the low rated voltage when a voltage applied to said glow plug at the start of the diesel engine is detected to be higher than the low battery voltage, said energization control means controlling a duty ratio for controlling an ON/OFF operation of said power control means; and means for detecting an element associated with a change in temperature of said glow plug, and wherein said energization control means comprises means for controlling the power supplied to said glow plug by controlling said power control means on the basis of a detected change in element during cranking of the diesel engine, wherein the element is a diesel engine speed, and said control means increases the power supplied to said glow plug in accordance with an increase in diesel engine speed. - View Dependent Claims (5, 6, 7, 8, 9)
-
Specification