JPH04219466A - Ignition signal distribution equipment in device with static high voltage distributor - Google Patents

Abstract

PURPOSE: To provide an ignition signal power distribution device which does not involve occurrence of misignition resulting from improper change of address even in the event of a failure likely generated in the revolving speed signal itself. CONSTITUTION: An address signal produced by a microcomputer is supplied to a flipflop forming part, which receives the address signal during the open time of ignition signals, stores the address signal at least during the feed time of subsequent ignition signals, and supplies to a decoder as stored address sign to be impressed at all times.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to an ignition signal distribution device in an installation with a static high-voltage distribution device.

0002

BACKGROUND OF THE INVENTION Ignition signal distribution devices for systems with static high-voltage power distribution in internal combustion engines are known. This device has a microcomputer for generating an ignition signal and an address signal, the address signal determining to which of the downstream ignition end stages the respective ignition signal is connected; It is provided with three address lines, these address lines are connected to a decoder,
This decoder sends a control signal as an output signal to the ignition end stage. The temporal correspondence of the signals is determined by the microcomputer on the basis of the information of the connected rotational speed signal.

In the event of a possible failure of the rotational speed signal itself,
The microcomputer loses synchronization during the application of the ignition signal, so that the address suddenly changes as a result of a disturbance on the address line. This results in ignition errors both in the ignition end stage controlled by the previous address and in the ignition end stage controlled by the new address. In the ignition end stage controlled by the previous address, ignition occurs at the wrong ignition timing, ie, prematurely, whereas in the ignition end stage controlled by the new address, ignition occurs completely out of sync. These ignition errors can cause severe knocking that can cause engine damage in extreme cases.

0004

SUMMARY OF THE INVENTION An object of the present invention is to avoid ignition errors caused by the above-mentioned disadvantageous address changes.

[0005]

[Means for Solving the Problems] According to the present invention, an address signal generated by a microcomputer is supplied to a flip-flop component, and the flip-flop component converts the address signal into an ignition signal. , the address signal is received during the opening time of the ignition signal, the address signal is stored at least during the subsequent application time of the ignition signal, and the address signal is supplied to the decoder as a stored constant-state applied address signal.

According to the invention, an address signal generated by a microcomputer is supplied via an address line to a flip-flop arrangement, which
The flop component receives the address signal during the open time of the firing signal. If the microcomputer has been resynchronized during the open time, an address change during the open time will not lead to an ignition error in any case. This received ignition signal is stored during the ignition signal input time and is further supplied to the decoder as a stored address signal. By intermediately storing the address signal during the turn-on time in this way, erroneous address changes during the turn-on time will not be received by the flip-flop components and will not result in a misfire. This is because address signals received during the open time are always applied to the decoder during the close time. A disturbance in the rotation signal or an address change during the input time therefore has no effect on the address signal which is intermediately stored and applied to the decoder. In this way, ignition errors due to address changes due to disturbances during the start-up time are eliminated and knocking, which is harmful to the engine, is avoided.

In an advantageous embodiment of the invention, the address signal generated by the microcomputer is received by the flip-flop arrangement in exactly synchronized fashion with the respective ignition signal as follows. That is, reception and synchronization take place on the respective rising edge of the signal.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, a block circuit diagram of an ignition signal distribution device 1 is shown together with a microcomputer 2, a flip-flop arrangement 3 and a decoder 4.

A rotational speed signal D is connected to the microcomputer 2 as an input signal for the temporal distribution of the ignition signal for engine operation.

The microcomputer 2 generates an ignition signal Z depending on the rotational speed signal D as follows. That is, a substantially rectangular signal or a trapezoidal signal is generated sequentially and sequentially over a predetermined time (hereinafter referred to as input time) having Z=1. The intervening time between these input times is Z=0,
This will be referred to as opening hours below. The ignition signal Z is supplied both to the flip-flop arrangement 3 and to the decoder 4.

Furthermore, by the microcomputer 2, 3
An address signal is generated via two address lines and supplied to a flip-flop arrangement 3 (triple D-type). The address signals on the three address lines A0, A1, A2 are sent out digitally with a 3-digit code. For example, 000;100;010.

Furthermore, based on the time chart of FIG. 3, the transfer/reception and intermediate storage of the address signal generated from the microcomputer 2 by the flip-flop component 3 will be explained in detail below.

From the flip-flop component 3, three other address lines X0, X1, and X2 are connected to a decoder 4, and on these lines also an address signal stored as a three-digit code is transmitted. is supplied to the decoder 4. A decoder configured, for example, as a "3:8 line decoder" converts the intermediately stored address signals into eight control signals Y1 to Y8 for the ignition final stage for an eight-cylinder engine. Next is the decoder function table.

[0014]

[Table 1]

FIG. 2 shows a time diagram of an ignition signal distribution device according to the invention without intermediate storage of address signals.

The top row contains address signals A0 and A1.
, A2 is shown, similar to the function table of the decoder described above (in this case X0, X1
, X2 directly A0, A1, A2 can be used. ) Control signal Y3 is assigned to address signal 010, control signal Y4 is assigned to address signal 011, control signal Y5 is assigned to address signal 100, and control signal Y1 is assigned to address signal 000. Approximately in the middle of the time course of the address signals, an ignition signal Z=1 is generated in each case, which ignition signal is simultaneously generated as a control signal Y3, Y4, etc. via the corresponding assigned address. The ignition itself is
When the corresponding control signal returns to 0 again, (Y1~Y8=
1→0) occurs during alternation of signal edges. Control signal Y1
~Y8 exists only once when Z=1, that is, exists during the above-mentioned input time. When Z=0, all control signals Y1 to Y8 are also 0. This corresponds to the opening time mentioned above.

In the first series of address signals A0, A1, A2, a fault S occurs during correct control by signal 100, which fault causes an address change to control signal 000. This causes the following: In other words, in the event of a fault S, the control signal Y5 goes to 0, and the subsequent alternation of signal edges triggers a premature ignition and an ignition error based thereon. At the same time, the control signal
This control signal is caused by an incorrect assignment when Y1=1, and this control signal is caused by an ignition error FZ during the alternation of the signal edge to Y1=0.
occurs at a totally inappropriate time for the cylinder to which it belongs.

On the other hand, FIG. 3 shows address signals A0, A1, A2 generated by a microcomputer.
An ignition signal distribution device according to the invention is shown in which the ignition signal is received and intermediately stored in a flip-flop arrangement 3. The following can be seen from the time chart in FIG. That is, the reception and storage of the address signals A0, A1, A2 generated by the microcomputer 1 takes place each time the signal edge of the ignition signal Z rises. The intermediately stored address signals X0, X1, and X2 are
Each of these signals is held during the application time of the ignition signal Z and the subsequent open time, and is constantly applied to the decoder 4 during this time period.

A similar fault S is shown in FIG. 3 in the time domain of address signal 100 among address signals A0, A1, A2. The address 100 already received and stored in the flip-flop arrangement prevents a disturbance S to the address change 000 for the decoder 4, so that the correct control signal Y5 is now in control for all input times. and ignition occurs at the correct ignition timing upon alternation of the signal edge to Y5=0.

[0020]

According to the present invention, by intermediately storing the address signal during the turn-on time, erroneous address changes during the turn-on time will not be received by the flip-flop component and will not result in a misfire. This is because address signals received during the open time are always applied to the decoder during the close time. A disturbance in the rotation signal or an address change during the input time therefore has no effect on the address signal which is intermediately stored and applied to the decoder. In this way, ignition errors due to address changes due to disturbances during the start-up time are eliminated and knocking, which is harmful to the engine, is avoided.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram of an ignition signal distribution device.

FIG. 2 is a time chart of a conventional ignition signal distribution device that does not perform intermediate storage of address signals;

FIG. 3 is a time chart of an ignition signal distribution device that performs intermediate storage of address signals according to the present application.

[Explanation of symbols]

1 Ignition signal distribution device 2 Microcomputer 3 Flip-flop component 4 Decoder

Claims (3)

[Claims] 1. Ignition signal distribution device in an installation with a static high-voltage distribution device, comprising a microcomputer (μc) for generating an ignition signal (Z) and an address signal (address lines A0, A1, A2). and a decoder (4) which sends control signals (Y1 to Y8) as output signals to the ignition end stages, the address signal being used to determine which of the downstream ignition end stages the respective ignition In the ignition signal distribution device, which determines whether to switch the signal (Z), the address signal (address lines A0, A1, A2) generated by the microcomputer (2) is connected to the flip-flop component (3). the flip-flop component (3) is configured to receive the address signal (address lines A0, A1, A2) during the open time (Z=0) of the ignition signal; This address signal is stored at least during the application time of the subsequent ignition signal, and is supplied to the decoder (4) as an address signal (address lines A0, A1, A2) applied in the stored constant state. Ignition signal distribution device in installations with high-voltage power distribution devices. [Claim 2] Flip from a microcomputer.
Three address lines (A0, A
1, A2) and correspondingly three address lines (Xφ, X1, X2) from the flip-flop arrangement (3) to the decoder (4). . 3. The address signal (address lines A0, A1, A2) generated by the microcomputer is received by the flip-flop arrangement (3) at the respective rising edge of the signal (Z). 1
Or the ignition signal power distribution device according to 2.