GB1292309A - Electronic distributor of electric signals controlling the operation of internal combustion engines - Google Patents

Abstract

1292309 Regulating IC engines; ignition systems SOC DES PROCEDES MODERNES D'INJECTION SOPROMI 13 Nov 1969 [20 Dec 1968] 55712/69 Heading F1B [Also in Division G4] A ring counter controls the distribution of signals controlling ignition or fuel injection in an internal combustion engine. The detailed description concerns the latter. The counter, Fig.2, comprises one 4-layer semi-conductor 11, which conducts as soon as the system is switched on, and three single-junction semi-conductors 12-14. Single-junction 35 is cut off while transistors 9, 10, 28, 29 conduct. Potential from point a pulses thyristor 30 to energize the solenoid controlling fuel injector 51, the duration of the injection being dependent on parameters controlling variable resistors 23-26, 34. The injection ceases when the potential across capacitor 27 energizes single -junction 35 so cutting off transistor 28. A positive pulse, such as from the ignition contact-breaker 1, stops the counter in known manner. Fig. 2 does not show a resetting circuit but a long pulse applied to a transistor (70), Fig.3 (not shown) between the anodes of 11, 12 ensures that 11 conducts to the next pulse from 1 to restart the cycle. Fig. 5 shows a similar resetting arrangement with a counter using single-junction stages only. As an alternative to the use of transistor 70 resetting is effected by amplification of a weak pulse from one of the sparking plug leads 149, the resulting pulse being applied to the first stage 11a. In arrangement of Fig. 5 responds to operation of push button 134 to produce a round of injections without rotation of the engine. Fig. 4 shows an arrangement for amplifying and shaping ignition pulses. The injection pulses can be delayed according to the conditions of the engine, e.g. engine speed or load. (For Figures see next page)