F - Mech Eng,Light,Heat,Weapons – 02 – P
Patent
F - Mech Eng,Light,Heat,Weapons
02
P
341/27
F02P 19/02 (2006.01) F01P 5/00 (2006.01)
Patent
CA 1194183
ABSTRACT OF THE DISCLOSURE The invention relates to a reciprocating piston internal combustion engine having a plurality of heads, a glow-plug associated with each one of the heads, a source of DC voltage, and a control for providing heating power to the glow-plugs. The engine also has engine oil and trans- mission oil flowing therethrough, and a fan for cooling the oil. A first switch turns the fan on and off. In accord- ance with the invention, there is included a central electronic control which includes thermistors for sensing a temperature related to the temperature of the engine and for providing a connection from the source of DC voltage to the glow-plugs when the sensed temperature is below a predetermined value and for disconnecting the source when the sensed temperature is above the predetermined value. A duty cycle rate generator alternately connects and disconnects the source to the glow-plugs above the preset value at a duty cycle rate which ranges from 0 to 100 percent and which depends on the voltage level of the source of DC voltage The thermistors are disposed to measure the temperature of the first and eighth heads and the engine and transmission oil, and a second controller controls the first switch to turn the fan on and off depending on the temperature sensed by the temperature sensors. The control includes a second duty cycle rate generator, also ranging from 0 to 100 percent, but dependent on the magnitude of the most significant sensed temperature.
411889
Dunlop Robert P.
Durand Marcel J.p.e.
Slezak Paul J.
Khd-Canada Inc.
Ogilvy Renault
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