Patent
Glow plug alternator control
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TLDR
In this paper, the authors present a control system for igniting devices (28,30,32,34,36,38) used in an internal combustion engine (24) using alternate fuels.Abstract:
The present invention pertains to a control system for igniting devices (28,30,32,34,36,38) used in an internal combustion engine (24). In order to ignite alcohol fuel in a diesel engine, the fuel must be heated before or during compression. Glow plugs (28,30,32,34,36,38) conveniently provide heat, but have a short life in such continuous applications. Glow plugs must be accurately controlled to prevent overheating, which leads to open-circuiting. Individual constant voltage controls attempt to provide this function, but are only moderately successful. They are costly and complex, and provide only moderate protection from overheating. Since glow plug resistance correlates to glow plug temperature, resistance control provides better protection against glow plug overheating. Therefore, an apparatus (20) monitors the resistance of a single glow plug (28), and controls the resistance of each glow plug to a preselected resistance value. This preselected resistance value represents a glow plug temperature, that provides satisfactory fuel combustion combined with improved glow plug life. The principal use of the apparatus (20) of the present invention is with internal combustion engines using alternate fuels.read more
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References
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Patent
Glow plug control system for a Diesel engine
Tateki Mitani,Akira Demizu +1 more
TL;DR: In this paper, a glow plug control system is described, which includes a controller connected to a battery through an ignition switch, an indicator lamp and a relay connected to the controller and a parallel combination of four glow plugs connected to battery through normally open contacts of the relay.
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After glow control system for engine
TL;DR: In this paper, an after glow control system for an engine, which controlls the voltage to be applied to glow plugs of the engine, is described, and a switching control circuit is provided with a comparator which compares the output voltage of the voltage dropping circuit with the set voltage generated by a set voltage generating circuit and controls the opening and closing period of the switching means.
Patent
Engine start assisting device
Hideo Kawamura,Takahiko Itou +1 more
TL;DR: In this article, the warm-up time of a glow plug starting device in a diesel engine is reduced by using as the material for the heat generating element in the glow plug a metallic resistance material whose resistance up to the starting temperature is less than two-thirds of the rated resistance of a conventional element.
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Diesel engine glow plug energization control system
TL;DR: In this article, a positive temperature coefficient resistor element of the type that has a substantially constant resistance value when the temperature thereof is less than a selected value is mounted in thermal communication with a Diesel engine and is arranged to be electrically energized and deenergized simultaneously with the engine glow plug energizing circuit.
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System for improving the starting of diesel engines in cold weather
TL;DR: In this article, a system for improving the starting of indirect and direct injection diesel engines in cold weather, including glowplugs powered by a source of electrical potential for heating the diesel fuel and circuitry for controlling the operation of the glowplug, is presented.