JPS58131364A - Ignition device for internal-combustion engine - Google Patents

Abstract

PURPOSE:To enable ignition in two systems to be made readily by generating a masking signal in a distributor without modifying the advance angle control unit and eliminate the need for reduced size of power distribution system and for power distribution at a high voltage and also eliminate factors causing erroneous operation thereby improve the reliability in operation. CONSTITUTION:The arrangement is made such that a discriminator 12 receives as its inputs a coil OFF signal having an ignition coil control signal or angle of advance a which is computed in a advance angle control unit 8 by a signal (a) generated by a reference signal generator 6 and an amplifier 7, an advance angle unit signal C having a duration B to keep coil ON, and a masking signal b. The discriminator 12 serves to discriminate the actuating coil when receiving a signal f which closes gate by signal H of masking signal b (at point A) and opens the gate by signal L of ignition signal d (at point C) generated by OFF signal of the advance unit signal C, and a signal e which closes gate by signal L of masking signal b (at point B) and opens the gate by the signal (at point C) of ignition signal d.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to internal combustion engine ignition &k that operates a plurality of ignition coils when controlling the entire ignition timing of the engine.

Conventionally, there has been a device shown in FIGS. 1 and 2 as a device for this purpose. FIG. 1 shows a power distributor, and FIG. 2 shows a block diagram of an ignition device. In Figure 1, l is a power distributor, -
a cap electrode 2 for distributing power to a spark plug of an engine not shown;
It has a rotor electrode 4 directly connected to a shaft 3 driven by the engine.

5 is a housing. In the diagram wI2, 6 is a reference signal generator for electronic advance ignition timing, and 7 is an amplifier that shapes the signal of this reference signal generator 6 into a waveform and outputs it. It is built into the power distributor l. 8 calculates the advance angle based on the above signal and other factors not shown, and turns on the ignition coil 9.
Advance angle control unit that outputs OFF signal, lO
receives the output of this unit 8 and turns on the ignition coil 9f:
, the amplifier is turned off.

The above conventional device 1IFi, advance angle control unit 8
Since the rotor electrode 4 is directly connected to the shaft 3 in a device that controls ignition timing and distributes power to a multi-cylinder engine, a deviation α corresponding to a change in ignition timing occurs between the cap electrode 2 and the rotor electrode 4. If the amount of advance is large, problems such as power distribution to unintended cylinders or leakage to the ground section will occur, so the cap electrode 2
It was necessary to increase the size of the power distributor or to limit the amount of advance angle control. In addition, in the conventional device, advance angle calculation is performed in the control unit 8 based on the ignition reference signal a shown at tl and 4G, and the ignition coil is
N, OFF signal output method, single coil 1
For those that turn on and off the next circuit or control multiple coils, prepare multiple ignition reference signals t, amplify and waveform shapes for output to the control unit,
Both the advance angle control unit and the power distributor had the disadvantage of being complicated.

This invention was made to eliminate the drawbacks of the conventional ones as described above.In contrast to the power distribution system using a single ignition coil, this invention eliminates the need to change the advance angle control unit by creating a masking signal in the power distributor. The purpose of the present invention is to provide an internal combustion engine ignition system I that easily enables two systems of ignition without having to do so, thereby making the power distribution system more compact and eliminating the need for high-voltage power distribution.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, the lFi power distributor, 2 is a cap electrode, 4 is a rotor electrode, receives the secondary output voltage of the ignition coil 90 of the above-mentioned power distributor company 1, and distributes power to the ignition plug of the engine (not shown). 6 is a reference signal generator, 7 is an amplifier for amplifying and waveform-shaping the signal of this reference signal generator 6, and outputting it as a signal for the advance angle control unit; 8 is an amplifier for outputting the signal from the reference signal generator 6 as a signal for the advance angle control unit; Calculate the advance angle and ignition coil 9
11 is a masking signal generator for selecting the ignition coil, 12 is a road angle control unit 80 is a discriminator that selects and intermits the ignition coil based on the ignition coil control signal and the masking signal. It is.

Next, what about Jin's invention? :Explain about FIG. 4.

Reference signal generator l16. F by signal a from amplifier 7
) The ignition coil control signal calculated by the advance angle control unit 8, that is, the coil OFF signal with the advance angle α, the advance angle unit signal C with the coil ON period β, and the masking signal input to the discriminator 12. becomes. The discriminator 12 closes the dart at the H signal of the masking signal (point A), and opens P- at the ignition signal d(2)L signal (point 0) generated by the OFF signal of the advance unit signal C. signal f and
Close the dart with masking signal b (DL double signal B point),
Then, the signal that opens the dart at the ignition signal d (0 point)
The circuit 9 discriminates the operating fill, and when the discriminator 12 is ON, the coil corresponding to that circuit operates. In this way, it becomes possible to control two systems of ignition coils using the advance angle control unit 8FJ and the conventional one.

In the above embodiment, the power distribution side for the two high-voltage systems is 5 years, P
As shown in section C, if a simultaneous ignition coil is used, a power distribution section becomes unnecessary. In addition, although the masking signal is shown as a single signal, it is possible to select three coils when using two signal systems. Therefore, by increasing the signal area, the function of the discriminator can be further improved. I can do it. Furthermore, if you only perform signal processing for discrimination and function and provide a separate amplifier to switch on and off the primary current of the ignition coil, it is possible to reduce the heat generation at the foot of the built-in power distributor and achieve a smaller size. This is accomplished by attaching an amplifier to the ignition coil.

As described above, according to the present invention, the ignition coils are differentiated and used by the power distributor, so that the advance angle control unit can control multiple ignition coils as needed without any modification. This makes it easy and inexpensive to install, and has the added effect of reducing the number of small signals sent and received between systems, reducing the causes of malfunctions and improving reliability. be.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a power distributor and an explanatory diagram of a cap electrode and a rotor electrode, Fig. 2 is a block diagram of a conventional internal combustion engine ignition system, Fig. 3 is a block diagram showing an embodiment of the present invention, and Fig. 4 is a block diagram of a conventional internal combustion engine ignition system. The figure is a time chart for explaining the invention in detail. DESCRIPTION OF SYMBOLS 1... Power distributor, 2... Cap electrode, 4... Rotor electrode -6... Reference signal generator, 7... Amplifier,
8...Advance angle control unit, 9-...A hikoi k, 11...Masking signal generator, 12...
・Discriminator. In addition, the same reference numerals in the figures indicate the same or equivalent parts.
Shin Hino - Figure 1 Figure 2

Claims (2)

[Claims] (1) A reference signal generator and a masking signal generator for electronic advance ignition timing are built into the power distributor, and multiple ignition coils are selected based on the ignition signal and masking signal input from the key advance control unit. and an internal combustion engine ignition system having a power distribution device incorporating an intermittent discriminator. (2) The internal combustion engine ignition system as set forth in claim f#, boxed item 1, characterized in that the output signal amplification circuit of the advance angle control unit is attached to an ignition coil.