CN2242349Y

CN2242349Y - Electronic ignition for motor cycle

Info

Publication number: CN2242349Y
Application number: CN 95240375
Authority: CN
Inventors: 黄德标
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-08-22
Filing date: 1995-08-22
Publication date: 1996-12-11
Anticipated expiration: 2005-08-22

Abstract

The utility model relates to an electronic ignition for motorcycles, which is composed of a rectifying circuit, a power storage circuit, a follow current circuit, a trigger circuit, a switching circuit, a switch protection circuit, etc. The utility model is characterized in that the utility model utilizes a negative AC voltage generated of a certain amplitude generated by the charging coil of a magneto as the triggering condition that the trigger circuit acts, thus the whole circuit of the utility model is made to work at a short interval, namely, the whole circuit is in an AC pulse working state, and therefore, the heat consumption of the utility model is low; in addition, the ignition angle of the circuit of the utility model can be enlarged along with the increase of the rotation speed of an engine, and thus the work efficiency of the engine can be increased.

Description

Electronic Ignitor for Motorcycle

The utility model relates to a kind of motor auto electronic ignition mechanism.

The electronic Ignitor for Motorcycle that occurs is because there is defective in ignitor circuit design itself at present, some manufacturer uses common components and parts for reducing cost in addition, making this key component of igniter of motorcycle is a great problem all the time, even imported car also can be worried flame-out on the way problem.Force some motorcycle manufacturers to have to retrace one's steps like this, reuse early stage external trigger ignition (fixed ignition angle), though reliable trigger raising like this is then unfavorable to motor, one can not give full play to engine performance; Two noises are serious, and mechanical compliance is poor, impact seriously, and machine is easy to wear.

The purpose of this utility model is: the motor cycle ignition of provide that a kind of circuit elements device hear rate is low, firing angle can the corresponding adjustment with engine speed change.

For achieving the above object, the utility model is made up of rectification circuit 1, accumulator 2, freewheeling circuit 3, trigger circuit 5, switching circuit 6, switch protection circuit 8 etc.As shown in Figure 1, rectification circuit 1 and accumulator 2 are serially connected with in the charge circuit that magnetic motor for motorcycle charge coil 4 and high-voltage ignition coil 7 elementary windings are constituted, the alternating voltage of output is timing on magnetogenerator charge coil 4, rectification circuit 1 work, and be accumulator 2 charging energy storage; The input end of trigger circuit 5 is connected to the interchange negative voltage output terminal of magnetogenerator charge coil 4, the output terminal of trigger circuit 5 is connected to the control end of switching circuit 6, accumulator 2, switching circuit 6, form a discharge loop between the spark coil 7 elementary windings, when magnetogenerator charge coil 4 output AC voltages are certain negative value, trigger circuit 5 trigger, make switching circuit 6 actions, the connection of switching circuit 6, make the electric energy that when magnetogenerator charge coil 4 output AC positive voltages, is stored in the accumulator 2 discharge, and on the secondary windings of spark coil 7, induce the high pressure that can make plug ignition by above-mentioned discharge loop.Freewheeling circuit 3 is accumulator 2 afterflows in time, can the high speed proper functioning to guarantee accumulator 2.

The design's key is to utilize the trigger condition of the negative alternating voltage of certain amplitude that produces on the magnetogenerator charge coil as the trigger circuit action, entire circuit is only worked in an ofer short duration time lag, promptly be in a kind of alternating-current pulse working state, like this, the hear rate of entire circuit is low.

In addition, when rotating owing to high engine speeds, the amplitude of formed alternating voltage increases on the magnetogenerator charge coil, and adopts the negative voltage trigger condition of fixed amplitude that firing angle is strengthened, thereby has realized best igniting effect.Accompanying drawing 2 is promptly represented when the variation of engine speed, magnetogenerator charge coil output characteristic curve, and therefrom visible firing angle of the present utility model can improve and the situation of corresponding increasing with engine speed.Wherein, A is that high engine speeds is rotated curve, and B is that low engine speed is rotated curve, and T1 is low speed ignition advance angle (this advance angle can design by the motor requirement), and T2 is the high speed ignition advance angle, T2＞T1.

Advantage of the present utility model is: the circuit hear rate is little, no temperature rise, and the performance height is reliable, and the life-span is long; Firing angle 21 degree (also can design) during starting according to customer requirements, at a high speed firing angle advances to 32 degree 7000 rev/mins the time, easily start, therefore can give full play to the peak output of petrol engine, the mechanical part compliance is strengthened, and reduces or eliminates the impulsive contact force of mechanical part, and vehicle maintenance and maintainability greatly reduce, fuel-economizing is obvious, and exhaust smoke level, noise and spoilage greatly reduce.

Accompanying drawing 1 is the utility model schematic block circuit diagram.

Accompanying drawing 2 is a magnetogenerator charge coil output characteristics schematic representation.

Accompanying drawing 3 is the utility model embodiment's a electrical schematic diagram.

Introduce a most preferred embodiment of the present utility model below in conjunction with accompanying drawing 3.

D1, D3 constitute rectification circuit, and C1 constitutes accumulator, and D2, D5 constitute freewheeling circuit, and L is the magnetogenerator charge coil, and C2, R2 constitute trigger circuit, and T constitutes switching circuit, and D4 constitutes the switch protection circuit, and B is a spark coil, and R1 is a damping resistor.The parameter value and the characteristic of above-mentioned components and parts are respectively: D1-D4:IN4004; D5:IN4007; R1:47K/1W; R2:1K-5.6K/1W; T:FS3900; C1:1UF/400V, CBB metallic film terylen; C2:0.01-1UF/160V, CBB metallic film terylen.

Magnetogenerator charge coil L produces alternating voltage, and its positive half cycle charges to C1 through the D3 rectification.The C1 energy storage.Negative half period is opened controllable devices T through C2 (C2 is to alternating current path), D4; Capacitor C 1 stored energy is through T and the elementary discharge of B, and B time level produces the above high pressure of 15KV, makes spark plug sparking.D4 is a T protection diode, and D2, D5 are fly-wheel diode.

That lights a fire is punctual, and the control of advance angle is just controlled by the time constant that discharges and recharges of C2.The size of the T angle of flow is that the height of trigger voltage is by R2 branch pressure-controlled.

This electric circuit characteristic is the alternating-current pulse working state, just can make T conducting work when having only the negative impulse amplitude to arrive certain value, and later R2, D4, T, the B element of most of the time C2 does not have current loop.D1, D2 itself flow through little electric current, also do not have temperature rise.The R1 resistance is very big, is 47K, and it is very little to flow through electric current, therefore we can say there are not heatable components and parts.Therefore this igniter be efficient, long lifetime, highly reliable igniter, and regardless of summer in winter, launch metrics is constant, start all very convenient because there is not the DC component of temperature influence.

Claims

1, a kind of electronic Ignitor for Motorcycle, it is made up of rectification circuit, accumulator, freewheeling circuit, trigger circuit, switching circuit, switch protection circuit etc., it is characterized in that: rectification circuit and accumulator are serially connected with in the charge circuit that magnetic motor for motorcycle charge coil and the elementary winding of high-voltage ignition coil constituted, the alternating voltage of exporting on the magnetogenerator charge coil is timing, half-wave rectifying circuit work is accumulator charging energy storage; The input end of trigger circuit is connected to the interchange negative voltage output terminal of magnetogenerator charge coil, the output terminal of trigger circuit is connected to the control end of switching circuit, accumulator, switching circuit, form a discharge loop between the elementary winding of spark coil, when magnetogenerator charge coil output AC voltage is certain negative value, trigger circuit triggers, make the switching circuit action, the connection of switching circuit, the electric energy that is stored in when making magnetogenerator charge coil output AC positive voltage in the accumulator discharges by above-mentioned discharge loop, and induces the high pressure that can make plug ignition on the secondary windings of spark coil.