GB2272253A

GB2272253A - Engine ignition distributor

Info

Publication number: GB2272253A
Application number: GB9218979A
Authority: GB
Inventors: Josef Petr Prokopius
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-08
Filing date: 1992-09-08
Publication date: 1994-05-11
Anticipated expiration: 2012-09-08
Also published as: GB9218979D0; GB2272253B

Abstract

In a distributor body 8 having a cap 1 and a rotor arm 2, an encapsulated printed circuit 13 including an electronic power switch 6 and an electronic timer are located with a sensor 12 receiving magnetic or light signals from a carrier 4 rotating with the spindle 14. The sensor signals control the ignition circuit and a timing light (10, Fig. 2) and a timing circuit adjuster (11) are located in the body 8. The circuit 13 and other components may be located in a metal container 7. <IMAGE>

Description

COMPACT DISTRIBUTOR WITH ELECTRONIC RETARD FUNCTION This invention relates to ignition systems for internal combustion engines in particular to electronic distributors and ignition circuit.

Presently used distributclrs for internal combustion engines of a mechanical and elect.ronic type are constructed with centrifugal advancing mechanism and vacuum devices to progressively advance ignition timing with increasing engine revolutions. When electrc.nic distributc.rs are used, generally part of engine ignition system is situated in separate enclosure apart from the distributor.

This invention introduces a contactless electronic distributor and ignition circuit constructed within the di stri but or body and i gni ti on circuit equipped with pre-settable electronic adjustment for retard of ignition timing progressively with increasing engine revolutions and timing light for static setting of ignition timing is also built within said distributor body.

A specific embodiment of the invention will now be described by way of typical example with reference to the accompanying drawings Fig. 1, Fig. 2 and rig. 3 in which: Fig. 1 is illustrating the Compact Distributor with Electronic Retard Function layout.

Fig. 2 is illustrating side view (S) of the said distributor showing a timing light (10) and time delay adjustment (11).

Fig. 3 is illustrating a typical block diagram of the electronic ignition circuit with retard adjustment.

A compact distributor with electronic retard function having a conventional distributor body (8), conventional distributor cap (1) and conventional spindle (14) carrying rotor arm (2), housed within said distributor body (8) being a metal enclosure (7) housing electronic ignition circuit constructed on printed circuit board (13 > , said electronic ignition circuit being fully encapsulated by suitable resin and consisting of electronic sensor (SE) situated in p.Dsiti4n ( activated to give electrical output by means such as plurality of permanent magnets (M) situated in magnet carrier C4) in position t9) or by means of a light emitter and receiver with a reflecting chopper replacing said magnet carrier (4), the said electronic sensor (SE) situated in position ( activating simultaneously electronic switch (ESWI) and electronic timer (T), said electronic timer providing time delay of ignition timing and electrically activating electronic switch (ESW2), both said electronic switches such as transistors, thyristors or inte Q*ed circuits providing logical OR function of electrical signal to an electronic power switch (PSW) in position (6) and also activating timing light (TL) in position C10), said electronic power switch (PSW) switching ON and OFF power to ignition coil CIC), said electronic timer CT) having an electronic adjustment (A) situated in position (5) and C11) by means such as pre-settable resistor or capacitc.r accessible from outside of the said distributor and providing the desired variable time delay for the ignition timing to retard, said magnet carrier or chopper C4) being attached to the distributor spindle (14) by some conventional means such as a set screw (3) and rotating in synchronisation with engine crankshaft. Alternatively said electronic switches (ESW1) and CESW9) may be used as power switches providing the switching of power to ignition coil (IC) directly and said electronic sensor (SE: :) may be of optical type using a chopper plate instead of magnet carrier (4) and said electronic ignition circuit on printed circuit board (13) may be constructed directly within said distributor body (8:) without said metal enclosure (7).

Claims

Claims.

1) A compact distributor with electronic retard function having a conventional distributor body, conventional distributor cap and conventional spindle carrying rotor arm, housed within said distributor body being a metal enclosure housing electronic ignition circuit constructed on printed circuit board, said electronic ignition circuit being fully encapsulated by suitable resin and consisting of at least~~one electronic sensor situated near the surface of said encapsulated ignition circuit , said electronic sensor activated by means such as at least one permanent magnet to provide an electrical output, said permanent magnet being situated in magnet carrier above the said electronic circuit, said magnet carrier attached to a distributor spindle which rotates in synchronisation with engine crankshaft and said permanent magnet activating said electronic sensor to provide electrical output simultaneously to a first electronic switch and to a time delay timer, said first electronic switch and said time delay timer providing a means of switching ON and OFF a power switch, the time delay timer providing progressive control of engine ignition timing retard and advance during varying engine revolutions by a constant time delay in switching the said power switch directly or through a second electronic switch, said power switch controlling electrical power to an ignition coil and said power switch state and firing point of the ignition is being indicated by a timing light built within said metal enclosure.

2) A compact distributor with electronic retard function as claimed in Claim 1, where said time delay for switching ON and OFF the said ignition coil is held constant during the engine operation providing progressively retarding function of engine ignition timing with increasing engine revolutions, but said time delay timer has accessible facilities for varying the said time delay period by means of a manual adjustment to suit to the different makes of engines.

3) A compact distributor with electronic retard function as claimed in Claim 1 and 2, having its complete electronic circuit components housed in said metal enclosure, the said metal enclosure being mounted in conventional distributor body.

4) A compact distributor with electronic retard function as claimed in any preceding Claim, having its complete electronic circuit housed directly in the distributor body.

5) A compact distributor with electronic retard function as claimed in any preceding Claim, where said electronic sensor is of a magnetic type activated into operation by a magnetic field provided by at least one permanent magnet situated in said magnet carrier.

6) A compact distributor with electronic retard function as claimed in any preceding Claim where said electronic sensor is a light emitter and receiver with a reflecting chopper, said reflecting chopper being in a place of said magnet carrier.

7) A compact distributor with electronic retard function as claimed in any preceding Claim, where said magnet carrier or reflecting chopper are rotating in synchronisation with engine crankshaft and activating said electronic sensor.

8) A compact distributor with electronic retard function as claimed in any preceding Claim where the said first, second electronic switch and power switch is a transistor, thyristor or integrated circuit.

9) A compact distributor with electronic retard function as claimed in any preceding Claim, where said first and second electronic switch are power switches controlling the electrical power to ignition coil directly.

10) A compact distributor with electronic retard function as claimed in any preceding Claim, where said timing light is built within the electronic distributor metal enclosure or distributor body providing a visual indication of firing position for static ignition setting.

11) A compact distributor with electronic retard function as substantially described elsewhere in this invention and as illustrated on accompanying drawing and block diagram.

Amendments to the claims have been filed as follows 1) A compact distributor with electronic retard function having a conventional distributor body, conventional distributor cap and conventional spindle carrying rotor arm, housed within said distributor body being a metal enclosure housing electronic ignition circuit which may be constructed on printed circuit board, said electronic ignition circuit, which may be fully encapsulated by suitable resin, consisting of at least one electronical sensor situated in said ignition circuit, said electronical sensor activated by means of its appropriate activating device such as at least one permanent magnet to provide an electrical output, said permanent magnet being situated in magnet carrier close to the said electronic circuit, said magnet carrier attached to a distributor spindle which rotates in synchronism with engine crankshaft and said permanent magnet activating said electronical sensor to provide electrical output simultaneously to a first electronic switch and to a time delay timer, said first electronic switch and said time delay timer providing a means of power for switching ON and OFF a power switch, the time delay timer providing progressive engine ignition timing retard by a constant time delay manually pre-settable to a certain length of time by manual pre-set adjustment means accessible from outside of the said compact distributor, the constant time delay representing shorter angular movement of the engine crankshaft in lower revolutions and longer angular movement in higher engine revolutions, so that the engine ignition timing is being continuously progressively retarded with increasing engine RPM and progressively advanced in decreasing engine RPM, the said power switch being switched ON and OFF directly by said electronical sensor and said time delay timer or through a first and second electronic switch, said power switch controlling electrical power to an ignition coil and the exact firing point of ignition system being indicated by a timing light built within said ignition circuit of said compact distributor.

2) A compact distributor with electronic retard function as claimed in Claim 1, where said time delay, controlled by said time delay timer for switching ON or OFF the said ignition coil, is held constant during the engine operation, the constant time delay providing progressive retarding of engine ignition timing with increasing engine revolutions, but said time delay timer has accessible facilities for varying the said time delay period by means of a manual adjustment to suit to the different makes of engines or different engine applications.

3) A compact distributor with electronic retard function as claimed in Claims 1 and 2, having its complete electronic circuit components housed in said metal enclosure, the said metal enclosure being mounted in conventional distributor body.

4) A compact distributor with electronic retard 'function as claimed in any preceding Claim, having its complete electronic circuit housed directly in the distributor body.

5) A compact distributor with electronic retard function as claimed in any preceding Claim, where said electronical sensor is of a magnetic type activated by a magnetic field provided by at least one permanent magnet situated in said magnet carrier.

6) A compact distributor with electronic retard function as claimed in any preceding Claim where said electronical sensor is a light emitter and receiver with a light reflecting chopper, said reflecting chopper being instead of said magnet carrier.

7) A compact distributor with electronic retard function as claimed in any preceding Claim, where said magnet carrier or reflecting chopper is rotating in synchronism with engine crankshaft and activating said electronic sensor.

8) A compact distributor with electronic retard function as claimed in any preceding Claim where said first electronic switch is a part of said electronical sensor and said second electronic switch a part of said time delay timer.

9) A compact distributor with electronic retard function as claimed in any preceding Claim where the said first, second electronic switch and power switch is any kind of a transistor, thyristor or integrated circuit.

10) A compact distributor with electronic retard function as claimed in any preceding Claim, where said first and second electronic switches are power switches controlling the electrical power to ignition coil directly.

11) A compact distributor with electronic retard function as claimed in any preceding Claim, where said timing light is built within the electronic circuit in said metal enclosure or distributor body providing a visual indication of firing position for static ignition setting.

12) A compact distributor with electronic retard function as substantially described elsewhere in this invention and as illustrated in Fig. 1 - 3 on accompanying drawing and block diagram.