Abstract:
The present subject matter described herein relates to methods (400) and systems (200, 218, 300) for controlling electrical power supply for a plurality of electrical loads in a vehicle. According to one embodiment, the power supply system includes an AC generator (102) that generates an AC voltage having a positive half and a negative half. An ignition control system (112) includes a DC voltage regulator (114) having a first switching device (116) that converts the AC voltage received from the AC generator (102) to a DC voltage and an ignition control unit (122) that enables generation of an actuation signal when the speed of the engine is higher than a predetermined level. A load voltage regulator (202) having a second switching device (106) and a third switching device (206) for supplying positive and negative halves of the AC voltage to the plurality of electrical loads is provided.
Abstract:
This invention is characterized in that, in order to use an engine like a nut runner by shifting between a forward rotational mode and a reverse rotational mode, rotation positions taken by a crankshaft when a primary current has a maximum voltage during forward and reverse rotations of the engine are set symmetric with respect to and ahead of a rotation position of the crankshaft corresponding to the upper dead point of a piston. When the voltage of the primary current in an electromotive coil (97) becomes maximal in a predetermined rotation position, which is ahead of the upper dead point of the piston (7) with respect to the rotational direction of the crankshaft, while the engine is rotated forwardly or the engine is rotated reversely, this voltage is detected by an ignition unit (177) in a position, in which the voltage reaches a predetermined level in the vicinity of the maximum level, or in a position, in which the voltage drops from the maximum level by a predetermined voltage, so that the primary current is short-circuited to generate a high voltage current in a secondary circuit and perform electric discharge at an ignition plug (45). Since the time of this ignition is set in the same position, which is ahead of the upper dead point, whether the engine is rotated forwardly or the engine is rotated reversely, it is unnecessary to regulate an ignition time according to the directions of the rotation.
Abstract:
A device for controlling ignition timing of an internal combustion engine employed in ships. In controlling the ignition timing in response to the opening degree of the throttle, when the throttle is actuated toward the closing direction, a relax/delay circuit relaxes the change of output from the throttle sensor in order to prevent the engine from stalling at the time of quick deceleration.
Abstract:
A capacitor (C1) of an ignition circuit (3) is charged by an output at a positive half cycle of an exciter coil (104), and the electric charge of the capacitor (C1) is discharged through a thyristor (Th1), whereby an ignition operation is carried out. When the level of a detected value (Vb) of the output voltage at a negative half cycle of the exciter coil coincides with the level of a reference voltage (Vr), a transistor (Tr4) is conducted so as to generate a reference signal. A measurement of an ignition timing calculated by a microcomputer is started at a reference signal generating position, and when an ignition timing is measured, an ignition signal is sent to the thyristor (Th1) to thereby start an ignition operation. The reference signal generating position is maintained constant by changing a reference voltage (Vr) in accordance with the output voltage and output frequency of the exciter coil.
Abstract:
An engine system includes an engine having a rotary member (75) that rotates together with the crankshaft (48), a plurality of first detection bodies (P1-N) provided on the rotary member (75), a second detection body (S) provided on the same rotary member (75), a detection means (96) that detects the first (P1-N) and second detection bodies (S), a crank pulse generating means that generates crank pulses from an output signal of the detection means, a detection body identifying means, and an ignition control section. The plurality of first detection bodies (Pl-N) are disposed so that their rear ends in a rotation direction of the rotary member are evenly spaced at first intervals along the rotation direction (R1), and the plurality of first detection bodies (P1-N) include an energization start detection body (P6) and an ignition detection body (P7). The second detection body (S) has a rear end disposed between a pair of the first detection bodies disposed at the first interval so that the intervals along the rotation direction between the rear end of the second detection body (S) and the rear ends of the pair of first detection bodies are second intervals different from the first interval. The detection body identifying means identifies the second detection body (S) based on intervals of crank pulses, and further, identifies the energization start detection body (P6) and the ignition detection body (P7) by using the second detection body (S) as a reference.
Abstract:
An ignition apparatus for use with an internal combustion engine to produce an electrical spark at a spark ignition device (10). The ignition apparatus includes triggering circuitry (196) having a processor with stored timing data. The processor receives a signal indicative of the rotational position of the magnet (32) and generates a triggering signal. The triggering circuitry (196) switches between a first mode wherein the triggering signal occurs at a fixed time relative to top dead center and a second mode wherein the triggering signal occurs at a variable time relative to top dead center based on the stored timing data.
Abstract:
A speed dependent ignition controller (10) and method utilizes a sensor output signal (A) to provide spark occurrence and dwell initiation at retard and advance angles (R, A) for an internal combustion engine. The sensor signal (A) has a pulse width (A-R) proportional to the difference between a desired ignition advance (A) and retard (R) angle. At low rpm, the sensor signal (A) is inverted to produce a retarded ignition angle (R) while at high rpm's the signal is utilized without inversion to produce an advance ignition angle (A).