CN2134498Y

CN2134498Y - Electronic igniting device

Info

Publication number: CN2134498Y
Application number: CN 92225601
Authority: CN
Inventors: 党育宏
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-06-20
Filing date: 1992-06-20
Publication date: 1993-05-26
Anticipated expiration: 2002-06-20

Abstract

The utility model relates to an igniter of a gasoline engine which is more than four cylinders, comprising an engine ignition switch K1, a distributor contact point K2, an ignition low voltage coil L1, a high voltage coil L2 and a current control circuit. The controlling circuit is in series connection between the contact point K2 and the ignition coil, though a working current is 4-6A, the current added on the contact point K2 is always smaller than 250 mu A, so the contact point can not be burnt. The utility model can also work between saturation and cutoff, so the spark is enhanced, the tailing of the spark exceeds 1 cm, and meanwhile, the utility model has little electricity consumption. Owing to the functions, the utility model has the advantages of small discharge capacity, oil saving and long service life of the machine, and the burden of cleaning contact point K1 and periodic replacing K2 of operators can be relieved.

Description

Electronic igniting device

The utility model relates to the above petrolic ignition mechanism of a kind of four cylinders.

Conventional igniting system makes pitting of contact with the 3-5A electric current easily by distributor point, and engine ignition function reduction, power character be poor, cause the oil consumption increase, acceleration mechanical wearing and tearing, blowdown flow rate are big, need clean the contact when serious, the periodic replacement contact.

The purpose of this utility model is to be connected in series a current control circuit between contact and spark coil, though operating current at 4-6A, the result is added in electric current on the contact all the time less than 250 μ A, so be difficult for the ablation contact, guarantees that motor uses for a long time.

Realize the technological scheme that the utility model adopted, as shown in Figure 1: this device by engine ignition switch K1, distributor point K2, light a fire low voltage winding L1, high-tension coil L2 and be serially connected in the contact and spark coil between current control circuit constituted.This control circuit always work in by and saturated between, guarantee electric current on the K2 of contact less than 250 μ A, the spark hangover surpasses 1cm.Control circuit is by triode T1, T2, T3, diode D1, D2, D3, and capacitor C 1, C2, C3, C4, resistance R 0, R1, R2, R3, R4 form.Wherein R1 is T ₁The current-limiting resistance of the b utmost point can make the T1 stable operation, and T1 is the negative bias stream controller of T2, because the T1 amplification is very little by the K2 electric current, has guaranteed that K2 never ablates, and provides enough negative bias stream to T2.R0 is T ₂The current-limiting resistance of the b utmost point prevents to enter the T2 negative bias and flows through big and possibility that burn T2, if T ₂B can save in straight hour.The effect of T2 is to swing to, and provides positive bias to T3.R3 is a T3 stable operating point resistance, and C1 stops Alternating Component to enter T3, makes T when T3 is saturated ₃The voltage of the b utmost point about 13V, T3 by the time T ₃The voltage of the b utmost point is O.

In control circuit, adopt the protective circuit formed by D1, C2, when T3 is saturated the L1 electric current by T3 go into ground, can not pass through D1, at this moment C2 towards; when T3 ends; the C2 discharge; compete L1 towards the quantity of magnetism; when shrank in L1 magnetic field, a L1 self-induction alternating voltage part was gone into ground through D1, and all the other go into ground through C2; prevent that alternating voltage from entering T3, protected the T3 proper functioning.

The D3 that adopts in circuit prevents that L1 and other alternating current (a.c.) from entering circuit, and short-circuit protection function is arranged, and C3 is the Lu wave circuit.Circuit has also adopted the pulse control network of being made up of R3, R4, D2, makes it the L1 self induction voltage is added on the R1 after R3 step-down, D2 rectification, forces circuit to end fast, and C4 prevents that the 14V direct current from entering the control net.

The utility model has been owing to adopted between contact K2 and spark coil serial connection one current control circuit, though operating current between 4-6A, is added in electric current on the K2 of contact all the time less than 250 μ A, so be difficult for the ablation contact.Between this control circuit worked in saturated always and ends, so the little enhancing spark of power consumption, the spark hangover surpassed 1cm.Also be provided with protective circuit in the control circuit, guaranteed that this device can proper functioning, use for a long time.The utility model blowdown flow rate is little, fuel-economizing and removed the burden that operator clean contact K2 and periodic replacement K2.This apparatus structure is simple, cost is low.

Fig. 1 is the utility model circuit theory diagrams.

Fig. 2 is the utility model circuit erection drawing.

In conjunction with Fig. 1,2 in detail working principle of the present utility model and linkage structure are described in detail.

Among Fig. 1, K1 is an engine ignition switch, and K2 is a distributor point, and L1 is the igniting low voltage winding, and L2 is a high-tension coil, and T1, T2 are the pnp transistor, and T3 is the npn high power transistor (GTR), R ₁5.1K, R ₂820 Ω, R ₃75K, R ₄6.8 Ω, R0 are relevant with the β value of T2, β value I with need not, D ₁5A, D ₂100mA, D ₃1A, C ₁0.047 μ, C ₂0.15 μ, C ₃100 μ, C ₄0.047 μ.Working procedure is like this: when K1 opens, when K2 closes, so R1 does not have negative current T1 not have negative bias stream, T1 ends, T2 do not have yet negative bias stream, T2 also by, T3 does not just have positive bias so, whole circuit ends.When K1 opens, when K2 also opens, R1 provides about 250 μ A negative bias stream to T1, T1 is saturated and for T2 provides enough negative bias stream, T2 is saturated and swing to, and provides positive bias to T3, the L1 heavy current is through T ₃The e utmost point is gone into ground, and T3 is saturated, and L2 does not have high tension spark.

Normal operation is like this, and K1 opens, K2 closes after opening immediately, and at this moment T1, T2, T3 shrink from the magnetic field of L1 in a flash that saturated trend is ended, and L2 induces strong electrical spark.K2 is switch repeatedly fast, and circuit can be saturated fast, work, end, and L2 can induce the strong high tension spark of consecutive, and is so just the same with conventional igniting system, guaranteed the difficult ablation of contact K2 again, makes engine ignitor normally to use for a long time.

Linkage structure of the present utility model is like this, as shown in Figure 1, 2, and at T ₁B utmost point series connection R1, the other end of R1 links to each other with K2 one end, K2 the other end ground connection.T ₁C utmost point ground connection, T ₁E utmost point serial connection R0, the R0 the other end and T ₂The b utmost point connects, T ₂The e utmost point links to each other with the D3 output terminal, and R2, C1, T3 are in parallel afterwards and T ₁The e utmost point connects, the other end ground connection.T2, D1 are in parallel afterwards with C2, and an end is connected the other end ground connection with spark coil.R3, C4, D2 are connected between the end points of L1 and K2 after being connected in series mutually, the end the other end ground connection that links to each other with K1 after R4, D3, the C3 series connection.

Claims

1, a kind of electronic ignition device, constituted by engine ignition switch K1, distributor point K2, igniting low voltage winding L1, high-tension coil L2 and current control circuit, between it is characterized in that described current control circuit makes ignition mechanism be operated in saturated all the time and ends, the electric current that is added on the K2 of contact remains on less than 250 μ A; The spark hangover surpasses 1CM, and this control circuit is by triode T1, T2, T3; Diode D1, D2, D3; Capacitor C 1, C2, C3, C4; Resistance R 0, R1, R3, R4 element constitute, wherein R1 is the current-limiting resistance of the T1b utmost point, make that T1 can stable operation, and T1 is the negative bias stream controller of T2, and R0 is the current-limiting resistance of the T2b utmost point, and the T2 gun stocks provides positive bias to T3, C1 prevents that alternating component from entering T3, R2 is a T3 stable operation resistance, makes the T3b pole tension when T3 is saturated about 13V, and blanking voltage is 0.