CN2044649U

CN2044649U - Capacitor discharging electronic ignition system

Info

Publication number: CN2044649U
Application number: CN 89202384
Authority: CN
Inventors: 朱健声; 陈永良; 朱冀
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-03-02
Filing date: 1989-03-02
Publication date: 1989-09-20

Abstract

The utility model relates to a capacitor discharging electronic ignition system, which is a vehicle ignition system which takes a gasoline engine as the power source. The sensor of the ignition system adopts a recorder magnetic head, and a signal generating source adopts rare-earth magnetic steel. A transformer adopts a high-frequency ferrite transformer. An energy-storage capacitor adopts a fixed type 3 mu F capacitance. The contacts of the ignition system of an accumulator are reserved. A converting switch is installed between the sensor and the contacts. The utility model has the advantages of reasonable structure, small size, strong versatility, low cost, good electrical performance and high reliability.

Description

Capacitor discharging electronic ignition system

It is the vehicle ignition system of power source with the petrol engine that the utility model relates to a kind of.

Mixed gas in the petrol engine cylinder is to be lighted by the electrical spark that igniting system produces.There are battery ignition system, magneto ignition system and novel solid-state ignition system in the igniting system that uses at present.Solid-state ignition system has inductance type igniting system and capacitive discharge ignition system by energy storage mode difference.Introduce in " automotive electric equipment " book that the Henan Province traffic school that People's Transportation Press published in 1985 compiles, the capacitor discharge type solid-state ignition system mainly is made up of power supply, DC booster, energy-storage capacitor, controllable silicon, trigger, spark coil and spark plug.Capacitive discharge ignition system is superior than other igniting, but complex structure, poor, the cost height of versatility, and spark duration is shorter, generally is no more than 0.6ms, makes the cold starting of motor and uses than weak mixture, and difficulty takes place.

The purpose of this utility model is the shortcoming that overcomes existing capacitor discharge type solid-state ignition system, provide a kind of rational in infrastructure, volume is little, highly versatile, cost are low, good electrical property, capacitor discharge type solid-state ignition system that reliability is high.

The purpose of this utility model realizes by the following technical solutions; Form the capacitor discharge type solid-state ignition system by power supply, DC booster, energy-storage capacitor, controllable silicon, trigger, spark coil, spark plug, shell.Its trigger is by as the rare earth magnetic steel of signal generating source, constitute as radio cassette player magnetic head, contact, filter circuit of pressure-stabilizing, signal amplifier, the signal processor of sensor, between sensor and the contact throw over switch is housed, filter circuit of pressure-stabilizing is made of triode, voltage-stabiliser tube, resistance, electric capacity.

Description of drawings:

Fig. 1 is a capacitor discharge type solid-state ignition system circuit block diagram.

Fig. 2 is circuit theory diagrams for embodiment's igniting.

Describe the utility model in detail below in conjunction with embodiment and accompanying drawing.

The utility model is formed (see figure 1) by power supply, DC booster 1, energy-storage capacitor C13, controllable silicon 5, trigger, spark coil 6, spark plug 7, shell.Its DC booster comprises the oscillator that is made of triode BG1, BG2, resistance R 1, R2, capacitor C 1, C2, the rectifier filter that transformer B and diode D4, D5, capacitor C 12, resistance R 9 constitute, transformer B adopts high frequency 30-50KHZ ferrite transformer.Its energy-storage capacitor C13 adopts the having of fixed 3uf " to recover " the metallization paper dielectric capacitance of ability certainly, and and resistance R 10 is arranged.Its trigger is made of rare earth magnetic steel, the radio cassette player magnetic head as sensor 9, contact P, filter circuit of pressure-stabilizing 2, signal amplifier 3, the signal processor 4 as signal generating source 8.Between sensor 9 and the contact P throw over switch K is housed; Filter circuit of pressure-stabilizing 2 is made of triode BG3, diode D1, resistance R 3, voltage-stabiliser tube W, capacitor C 3, C4, C5; Signal amplifier 3 is made of triode BG4, BG5, diode D2, capacitor C 6, C7, C8, C9, resistance R 4, R5, R6, R7, R8; Signal processor 4 is made of diode D3, capacitor C 10, C11.On the controllable silicon SCR and have diode D6(to see Fig. 2).Its shell is that aluminium sheet is made, in fill epoxy resin, throw over switch K, power supply wiring, spark coil wiring, sensor wiring and contact wiring are arranged on the panel, be embedded in as the rare earth magnetic steel of signal generating source 8 and be loaded on the nylon wheel on the distributor cam, sensor 9 is contained on the platinum seat.

Sensor 9 also can adopt the magnetic head that adds broad gap, and its toroidal core opening is 0.8-1mm, and winding wire diameter is 0.1mm, and the number of turn is the 1000-2000 circle.

The working procedure of igniting system is: throw over switch K beaten 9 one of sensors, and promptly contactless position, P empty jumping in contact is inoperative.Connect ignition switch, DC booster 1 work becomes Ac with power supply 12V low pressure and boosts, and is the 400-500V direct current through rectification again, charges to energy-storage capacitor C13.When sensor 9 does not have signal, the triode BG4 of signal amplifier 3 ends, cause triode BG5 the high petential conducting to occur because of base stage, make capacitor C 10 be in discharge condition, controllable silicon SCR triggers very low level and ends, energy-storage capacitor C13 is in charged state because of the discharge off loop, and its grace time needs 2ms approximately.When nylon wheel rotates with distributor cam, when signal generating source magnet steel 8 process sensors 9, just produce a pulse signal in the sensor 9, this signal through capacitor C 6 to triode BG4 base stage, wherein the positive pulse of signal makes triode BG4 conducting, make triode BG5 base stage low potential and end, capacitor C 10 chargings, its charging pulse adds to the controllable silicon SCR trigger electrode, make its conducting, energy-storage capacitor C13 to spark coil 6 elementary winding discharges, has meanwhile produced high-voltage potential, in spark plug 7 gap location arcings through controllable silicon SCR in secondary winding.The conducting of controllable silicon SCR also short circuit transformer B secondary, make oscillator at energy-storage capacitor C13 discharge moment failure of oscillation.Reduce to the shutoff value when following when the controllable silicon SCR both end voltage, controllable silicon SCR is turn-offed voluntarily, the starting of oscillation once more of oscillator this moment, and energy-storage capacitor C13 is recharged once more.

When throw over switch K beat one of contact P, igniting system just became the chattering type solid-state ignition system, and signal generating source 8 is inoperative with sensor 9, and contact P directly delivers to fire signal signal processor 4 and triggers controllable silicon SCR, realizes igniting.

The component parameter that this embodiment adopted is:

BG1、BG2：SD3；BG3、BG4、BG5：9013；D1、D2、D4、D5、D6：1N4007；D3：2AP15；W：2CW54；R1、R2：300Ω；R3：680Ω；R4：10KΩ；R5、R7：1KΩ；R6：4.7KΩ；R8：100Ω；R9：1.5MΩ；R10：1.0MΩ；C1、C2、C3：0.47uF／50V；C4、C5·100μF／16V；C6：10μF／10V；C7：3300PF；C8：47μF／6.3V；C9、C11：0.1μF；C10：1μF；C12：0.047μF／630V；C13：3μF／630V。

Its shell size as a soap stand, throw over switch K selects for use and turns round sub-switch.

Advantage of the present utility model: because 1, adopted volume is little, highly sensitive, thermal adaptability is strong radio cassette player magnetic head as sensor 9, can be contained in easily on the existing standard ignition distributor; 2, selecting of high frequency ferrite transformer B makes volume of transformer dwindle 5-10 doubly when same power output; 3, energy-storage capacitor C13 adopts the discharge capacity of fixed 3 μ F, and having prolonged igniting is spark duration, near inductance type igniting system, has also improved the low-pressure starting performance simultaneously; 4, the use of change-over switch K has kept the contact P of battery ignition system, can use when contactless part breaks down, and can also change soon battery ignition mooring points fire into after this igniting system damages; 5, designed filter circuit of pressure-stabilizing 2, having improved igniting is antijamming capability, has widened the voltage scope of application, and the use of diode D1, D2, D6 etc. has increased circuit protection simultaneously. Improved the electrical property of igniting system, so that the capacitor discharging electronic ignition system that this utility model provides has is rational in infrastructure, volume is little, highly versatile, cost are low, good electrical property, advantage that reliability is high.

Claims

1, a kind of capacitor discharge type solid-state ignition system of forming by power supply, DC booster 1, energy-storage capacitor C13, controllable silicon 5, trigger, spark coil 6, spark plug 7, shell, it is characterized in that: trigger is made of rare earth magnetic steel, the radio cassette player magnetic head as sensor 9, contact P, filter circuit of pressure-stabilizing 2, signal amplifier 3, the signal processor 4 as signal generating source 8, between sensor 9 and the contact P throw over switch K is housed, filter circuit of pressure-stabilizing 2 is made of triode BG3, resistance R 3, voltage-stabiliser tube W, capacitor C 3, C4, C5.

2, according to claim 1 described capacitor discharge type solid-state ignition system, it is characterized in that: energy-storage capacitor C13 adopts the metallization paper dielectric capacitance with " recovering certainly " ability of fixed 3 μ F.

3, according to claim 1 described capacitor discharge type solid-state ignition system, it is characterized in that the rectifier filter that oscillator, transformer B and diode D4, D5, capacitor C 12, resistance R 9 that DC booster 1 is made of triode BG1, BG2, resistance R 1, R2, capacitor C 1, C2 constitute forms, transformer B adopts high frequency 30-50KHZ ferrite transformer.

4, according to claim 1 described capacitor discharge type solid-state ignition system, it is characterized in that: sensor adopts the magnetic head that adds broad gap, and its toroidal core opening is that 0.8-1mm, winding wire diameter are that 0.1mm, the number of turn are the 1000-2000 circle.

5, according to claim 1 described capacitor discharge type solid-state ignition system, it is characterized in that: shell is that aluminium sheet is made, in fill epoxy resin, throw over switch, power supply wiring, spark coil wiring, sensor wiring and contact wiring are arranged on the panel, be embedded in as the rare earth magnetic steel of signal generating source 8 and be loaded on the nylon wheel on the distributor cam, sensor 9 is contained on the platinum seat.