-
公开(公告)号：DE3071748D1
公开(公告)日：1986-10-16
申请号：DE3071748
申请日：1980-06-09
Applicant: MOTOROLA INC
Inventor： JAVERI RUPIN JAYANT , PETRIE ADELORE FRANCIS
Abstract: Digital dwell circuitry (121) for a spark and dwell ignition control system (10) Maximum advance (15, 16) and reference (17, 18) sensors are utilized to produce pulse transitions (t u, t u) which determine positions of maximum and minimum possible advance for spark ignition with respect to the position of the engine crankshaft. For each maximum advance sensor pulse transition (t u) a main counter (41) starts a sequential running count of speed independent clock pulses (C u) wherein the maximum count obtained by the counter is related to engine crankshaft speed. The running and maximum counts of the main counter (41) are utilized by dwell circuitry (121) to determine the time (t u) prior to the next maximum advance pulse (t u) at which spark coil excitation should occur. The main counter running count also determines several inputs to a read only memory (ROM) circuit (48) whose output controls a rate multiplier (53). The rate multiplier (53) receives input clock signals (C2), provides selective frequency division for these clock signals in accordance with the ROM output, and the output of the rate multiplier is coupled to an accumulator means (80, 81, 82) whose accumulated count is utilized to determine the occurrence of spark ignition by terminating spark coil excitation.
-
公开(公告)号：DE2919151A1
公开(公告)日：1979-11-15
申请号：DE2919151
申请日：1979-05-11
Applicant: MOTOROLA INC
Inventor： PETRIE ADELORE FRANCIS , JAVERI RUPIN JAYANT
Abstract: Electronic signal processing circuitry for use in the ignition system of an internal combustion engine is disclosed herein. A signal generator which receives crankshaft position pulses from a sensor and produces periodic output pulses which have durations equal to a constant percentage of the period of the input sensor pulses is disclosed. The generator includes a crankshaft position sensor feeding a bistable flip-flop which controls a dual slope integrator circuit having its output coupled to a comparator with the comparator output coupled back to the reset terminal of the flip-flop. The generator produces pulses at the output of the flip-flop which have durations equal to a constant percentage of the period of the crankshaft position sensor pulses. The dual slope integrator circuit produces a periodic ramp (sawtoothed) signal which is processed by a clamping circuit and a comparator to produce an ignition dwell pulse which occurs a fixed time before the occurrence of the crankshaft position sensor pulses. An engine speed monitoring circuit also receives the periodic varying ramp signal produced by the dual slope integrator and via sampling circuitry produces an output signal related to engine speed whose magnitude is updated during each cycle of the crankshaft position pulses.
-
Patent Agency Ranking
公开(公告)号：MX148469A
公开(公告)日：1983-04-25
申请号：MX18275980
申请日：1980-06-13
Applicant: MOTOROLA INC
Inventor： JAVERI RUPIN JAYANT , PETRIE ADELORE FRANCIS
Abstract: Digital dwell circuitry (121) for a spark and dwell ignition control system (10) Maximum advance (15, 16) and reference (17, 18) sensors are utilized to produce pulse transitions (t u, t u) which determine positions of maximum and minimum possible advance for spark ignition with respect to the position of the engine crankshaft. For each maximum advance sensor pulse transition (t u) a main counter (41) starts a sequential running count of speed independent clock pulses (C u) wherein the maximum count obtained by the counter is related to engine crankshaft speed. The running and maximum counts of the main counter (41) are utilized by dwell circuitry (121) to determine the time (t u) prior to the next maximum advance pulse (t u) at which spark coil excitation should occur. The main counter running count also determines several inputs to a read only memory (ROM) circuit (48) whose output controls a rate multiplier (53). The rate multiplier (53) receives input clock signals (C2), provides selective frequency division for these clock signals in accordance with the ROM output, and the output of the rate multiplier is coupled to an accumulator means (80, 81, 82) whose accumulated count is utilized to determine the occurrence of spark ignition by terminating spark coil excitation.
-
公开(公告)号：MX144673A
公开(公告)日：1981-11-09
申请号：MX17761879
申请日：1979-05-11
Applicant: MOTOROLA INC
Inventor： PETRIE ADELORE FRANCIS , JAVERI RUPIN JAYANT
Abstract: Electronic signal processing circuitry for use in the ignition system of an internal combustion engine is disclosed herein. A signal generator which receives crankshaft position pulses from a sensor and produces periodic output pulses which have durations equal to a constant percentage of the period of the input sensor pulses is disclosed. The generator includes a crankshaft position sensor feeding a bistable flip-flop which controls a dual slope integrator circuit having its output coupled to a comparator with the comparator output coupled back to the reset terminal of the flip-flop. The generator produces pulses at the output of the flip-flop which have durations equal to a constant percentage of the period of the crankshaft position sensor pulses. The dual slope integrator circuit produces a periodic ramp (sawtoothed) signal which is processed by a clamping circuit and a comparator to produce an ignition dwell pulse which occurs a fixed time before the occurrence of the crankshaft position sensor pulses. An engine speed monitoring circuit also receives the periodic varying ramp signal produced by the dual slope integrator and via sampling circuitry produces an output signal related to engine speed whose magnitude is updated during each cycle of the crankshaft position pulses.
-
公开(公告)号：WO1982002927A1
公开(公告)日：1982-09-02
申请号：PCT/US1982000081
申请日：1982-01-22
Applicant: MOTOROLA INC
Inventor： MOTOROLA INC , PETRIE ADELORE FRANCIS
IPC: F02P05/04
CPC classification number: F02P7/0675 , F02P7/035 , F02P7/0775
Abstract: Systeme de commande de moteur a quatre cylindres (10) pour commander les fonctions d'allumage ou d'injection de combustible. Le systeme de commande comprend un appareil d'identification de cylindre (30, 50, 60) qui fonctionne conjointement avec un organe rotatif (11) mu en rotation par le vilebrequin du moteur ayant des saillies de distribution (14, 117) correspondant aux positions specifiques de rotation du vilebrequin. Une paire de detecteurs fixes (20, 21) detecte le passage des projections de distribution et envoie des signaux correspondants a un circuit de commande et de calcul de la distribution du moteur (40) qui envoie des signaux de commande qui sont achemines sequentiellement et selectivement pour commander l'allumage et/ou l'injection de combustible des cylindres du moteur dans une sequence predeterminee. Une saillie de distribution (14) comprend deux extensions radiales individuelles (15, 16) tandis qu'une autre comprend une seule extension (17). Un appareil d'identification des cylindres utilise des impulsions de detection (200, 201) fournies par les detecteurs fixes pour distinguer entre le passage de la paire d'extensions par rapport au passage de l'extension simple et produit une impulsion d'identification des cylindres (207) indiquant la position de rotation du vilebrequin du moteur. Ceci s'effectue par un premier circuit de rejet d'impulsions (60) qui fournit une sortie lorsque l'un des detecteurs produit deux impulsions avant que l'autre detecteur ne produise une impulsion ulterieure. Cette sortie est ensuite utilisee pour initier le portillonnage sequentiel des signaux de commande sur l'appareil de commande des cylindres.
-
公开(公告)号：EP0077333A4
公开(公告)日：1983-07-04
申请号：EP82900738
申请日：1982-01-22
Applicant: MOTOROLA INC
Inventor： PETRIE ADELORE FRANCIS
CPC classification number: F02P7/0675 , F02P7/035 , F02P7/0775
-
公开(公告)号：EP0031834A4
公开(公告)日：1981-10-27
申请号：EP80901351
申请日：1980-12-30
Applicant: MOTOROLA INC
Inventor： JAVERI RUPIN JAYANT , PETRIE ADELORE FRANCIS
CPC classification number: F02P3/0456
Abstract: Digital dwell circuitry (121) for a spark and dwell ignition control system (10) Maximum advance (15, 16) and reference (17, 18) sensors are utilized to produce pulse transitions (t u, t u) which determine positions of maximum and minimum possible advance for spark ignition with respect to the position of the engine crankshaft. For each maximum advance sensor pulse transition (t u) a main counter (41) starts a sequential running count of speed independent clock pulses (C u) wherein the maximum count obtained by the counter is related to engine crankshaft speed. The running and maximum counts of the main counter (41) are utilized by dwell circuitry (121) to determine the time (t u) prior to the next maximum advance pulse (t u) at which spark coil excitation should occur. The main counter running count also determines several inputs to a read only memory (ROM) circuit (48) whose output controls a rate multiplier (53). The rate multiplier (53) receives input clock signals (C2), provides selective frequency division for these clock signals in accordance with the ROM output, and the output of the rate multiplier is coupled to an accumulator means (80, 81, 82) whose accumulated count is utilized to determine the occurrence of spark ignition by terminating spark coil excitation.
-
-
-
-
-
-
Search Results
7
records
(took 0.028 seconds)
