KR0123839Y1 - Ignition timing control device for an engine - Google Patents

Abstract

The microcontroller 10 generates and outputs a first pulse signal for ignition of the engine, and when operated according to a driver's selection, the ignition timing of the first pulse signal input from the microcontroller 10 for a predetermined period of time. An ignition timing controller 20 for generating and outputting an advanced second pulse signal, a transistor 30 turned on / off according to a first or second pulse signal output from the ignition timing controller 20, and the transistor An ignition coil 40 for inducing and outputting a high voltage according to the turn-on / turn-off operation of the 30, a distributor 50 for distributing a high voltage input from the ignition coil 40 to each cylinder, and the distributor 50 It consists of a spark plug 60 to ignite by causing an electric flame according to the high voltage input from the), and after the driver judges the occurrence of knocking phenomenon by the fuel grade Accordingly, it relates to an ignition timing to the ignition timing of the engine control apparatus having an effect capable of maximizing engine power by making it possible to selectively control.

Description

Engine ignition timing control

1 is a block diagram showing the overall configuration of the ignition timing control apparatus of the engine according to the embodiment of the present invention,

2 is a detailed circuit diagram of an ignition timing control apparatus of an engine according to an embodiment of the present invention,

3 is a main operation waveform diagram of the ignition timing control device of the engine according to the embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

10: microcontroller 20: ignition timing control

30: transistor 40: ignition coil

50: distributor 60: spark plug

[Industrial use]

The present invention relates to an engine ignition timing control device. More specifically, it is possible to maximize the engine power by allowing the driver to determine the knocking phenomenon according to the fuel grade and to selectively control the ignition timing accordingly. The present invention relates to an engine ignition timing control device.

[Private Technology]

An ignition device is a device that burns a compressed compressor in an combustion chamber at an appropriate time with an electric flame, and is composed of an ignition coil, a distributor, a high voltage cable, an ignition plug, and the like.

The ignition device is divided into mechanical (contact type) and electronic (microcontroller) according to a method of controlling the ignition timing by controlling the DC power provided to the ignition coil, and the use of the electronic control method is gradually being expanded. It is a trend.

The electronic ignition timing control device outputs a pulse signal in accordance with the ignition timing so that the DC power applied to the ignition coil is interrupted as the transistor connected to the ignition coil is opened and closed by the pulse signal. Therefore, the high voltage is induced on the secondary side of the ignition coil, so that the ignition occurs in the spark plug.

Conventionally, the octane number varies according to the characteristics of the fuel, and therefore, in consideration of anti-knocking and seasonal air temperature and other environmental changes, the ignition timing is later than the maximum output period in which the ignition timing uniformly generates the maximum brake torque. It is set.

Therefore, despite the low probability of knocking caused by the driver using a high octane fuel, the ignition timing is set later than the maximum output period. have.

As a result, a device that automatically pulls the ignition timing applied to some models has been developed. However, such an expensive knocking sensor is used in most automobiles because it is disadvantageous in terms of economic efficiency such as an expensive knocking sensor and a controller. The reality is that the device is not installed.

[purpose]

Therefore, the object of the present invention is to solve the above-mentioned disadvantages, and maximizes the engine power by allowing the driver to judge the occurrence of knocking phenomenon according to the grade of fuel and to selectively control the ignition timing accordingly. To provide an inexpensive engine ignition timing control device.

[Way]

As a means for achieving the above object, the constitution of the present invention includes a microcontroller for generating and outputting a first pulse signal for ignition of an engine, and a first input from the microcontroller when operated according to a driver's selection. An ignition timing controller for generating and outputting a second pulse signal that has advanced the ignition timing of the pulse signal for a predetermined period, a transistor turned on / off in accordance with a first or second pulse signal output from the ignition timing controller, and the transistor; Ignition is achieved by generating an ignition coil that induces and outputs a high voltage according to the turn-on / turn-off operation of the power supply, a distributor that distributes the high voltage input from the ignition coil to each cylinder, and an electric flame according to the high voltage input from the distributor. Made of spark plugs.

The configuration of the ignition timing controller includes a latch pulse for outputting an ignition point time point based on a first pulse signal input from the microcontroller, and a reset time point based on a first pulse signal input from the microcontroller. A first counter for counting the A2 period of the first pulse signal input from the microcontroller and a third pulse for counting the A1 period (dwell time) of the first pulse signal input from the microcontroller. A ROM for outputting a counter, a value of the A3 period corresponding to the A2 period input from the first counter, a first latch circuit for temporarily storing the value of the A3 period of the ROM and outputting the value at the ignition point; A third counter that outputs a low signal during an A3 period input from the first latch circuit, and an input from the third counter A second latch circuit for temporarily storing a value of the A1 period and outputting it at the time when the dwell time starts, a fourth counter for outputting a high state signal during the A1 period input from the second latch circuit, and A pulse synthesizing circuit for synthesizing and outputting signals input from the second counter and the fourth counter, and a switch switched according to the driver's selection.

EXAMPLE

Hereinafter, the most preferred embodiments of the present invention will be described with reference to the accompanying drawings in order to be described in detail that can be easily carried out by those of ordinary skill in the art.

1 is a block diagram showing the overall configuration of the ignition timing control apparatus of the engine according to the embodiment of the present invention, and FIG. 2 is a detailed circuit diagram of the ignition timing control apparatus of the engine according to the embodiment of the present invention.

As shown in FIG. 1 and FIG. 2, the configuration of the ignition timing control apparatus of the engine according to the embodiment of the present invention includes a microcontroller 10 and a transistor having an input terminal connected to an output terminal of the microcontroller 10. 30, an ignition coil 40 having an input terminal connected to an output terminal of the transistor 30, a distributor 50 having an input terminal connected to an output terminal of the ignition coil 40, and an input terminal at an output terminal of the distributor 50. It consists of a spark plug 60 to which it is connected.

In the embodiment of the present invention, the transistor 30 is provided outside the microcontroller 10. However, depending on the vehicle type, the transistor 30 may be included in the microcontroller 10. In this case, the switch 21 may be provided between the transistor 30 and the ignition coil 40, and may be configured to separately add the transistor between the switch 21 and the ignition coil 30.

The configuration of the ignition timing control unit 20 includes a latch pulse 22 and a clear pulse 23 having an input terminal connected to an output terminal of the microcontroller 10, and an input terminal connected to an output terminal of the microcontroller 10. A first counter 25 and a third counter 26 having an input terminal connected to an output terminal of the clear pulse 23, a ROM 27 having an input terminal connected to an output terminal of the first counter 25, and a ROM. A latch circuit 28 having an input terminal connected to the output terminal of (27), a second counter 2A having an input terminal connected to the output terminal of the latch circuit 28, and an input terminal at the output terminal of the third counter 26 are provided. An input terminal is connected to the connected latch circuit 29, an output terminal of the latch circuit 29, and an output terminal of the fourth counter 2B, and an output terminal of the second counter 2A and the fourth counter 2B. An input terminal is connected to an output terminal of the pulse synthesizing circuit 24, the pulse synthesizing circuit 24, and the microcontroller 21. Comprises a control switch 21 which.

The operation of the ignition timing control device of the engine according to the embodiment of the present invention by the above configuration is as follows.

When the power is applied, the pulse signal A as shown in FIG. 3 is output from the microcontroller 10 to start the operation of the ignition timing control device of the engine according to the embodiment of the present invention.

Initially, since the switch 21 of the ignition timing controller 20 is in an off state, the pulse signal A output from the microcontroller 10 is transmitted to the transistor to turn on / off the transistor 30.

As described above, when the transistor 30 is turned on / off, a high voltage is induced on the secondary side of the ignition coil 40, and the high voltage is transmitted to the ignition plug 60 through the distributor 50. Sparks are generated to allow ignition.

The dwell time A1 of the pulse signal A is a time for charging the ignition energy to the ignition coil 40 and cannot be reduced below a predetermined value. The falling edge of the pulse signal A (shown by an arrow) indicates a time point at which the counter electromotive voltage is generated when energy charging of the ignition coil 40 is completed, and a time point at which ignition occurs immediately.

In the pulse signal A, the A2 section is a section that changes according to the engine's rotational speed. By controlling this section, the ignition timing can be advanced or slowed down. In the related art, the A2 period is set to a constant value according to the engine's rotational speed so that the ignition This has the effect of keeping the time constant.

When the engine is running in this way and the fuel is high in octane number, and it is determined that knocking does not occur even if the output is maximized by advancing the ignition timing, the driver switches the switch 21 of the ignition timing controller 20. Switch on.

When the switch 21 of the ignition timing controller 20 is switched on, the pulse signal A output from the microcontroller 10 is latch pulse 22, clear pulse 23, first and third counters 25. 26, is output to the pulse synthesizing circuit 24.

The first counter 25 counts the A2 section of the pulse signal A input from the microcontroller 10 and then outputs the address signal to the ROM 27 so that the value of the A3 section corresponding to the counting value is obtained from the ROM 27. Output to the latch circuit 28.

The latch circuit 28 stores the value of the section A3 input from the ROM 27, and then the second counter at the time point A4 of the pulse signal A as shown in FIG. 3 under the control of the latch pulse 22. By loading the value of A3 into 2A, the low state signal is output from the second counter 2A during the period A3.

The third counter 26 counts the A1 section (dwell time) of the pulse signal A input from the microcontroller 10 and outputs the value to the latch circuit 29.

The latch circuit 29 stores the value of A1 input from the third counter 26, and then, as shown in FIG. 3 by the control of the latch pulse 22, starts from the point A4 to the point A3 of the pulse signal A. FIG. After this, the A1 value is loaded into the fourth counter 2B so that the high state signal is output from the fourth counter 2B during the A1 period.

The output signals of the second and fourth counters 2A and 2B are input to the pulse synthesizing circuit 24 and synthesized by the pulse synthesizing circuit 24 to generate the pulse signal B of FIG. Through the transistor 30 is output.

Considering the pulse signal B of FIG. 3, it can be seen that the ignition timing is advanced by the period B2 than the original pulse signal A, so that the output of the engine can be maximized.

[effect]

As described above, in the embodiment of the present invention, after the driver judges the occurrence of knocking phenomenon according to the grade of fuel, the ignition timing can be selectively controlled according to the change of the air temperature according to the season and the like. It is possible to provide an inexpensive ignition control device for an engine with an effect that can be maximized. The driver can also use different fuels to test the ignition timing, allowing the driver to assess the quality of each fuel (ie, octane number). This effect of the invention can be used in the field of ignition of automotive engines.

Claims (2)

The microcontroller 10 generates and outputs a first pulse signal for ignition of the engine, and when operated according to a driver's selection, the ignition timing of the first pulse signal input from the microcontroller 10 for a predetermined period of time. An ignition timing controller 20 for generating and outputting an advanced second pulse signal, a transistor 30 turned on / off according to a first or second pulse signal output from the ignition timing controller 20, and the transistor An ignition coil 40 for inducing and outputting a high voltage according to the turn-on / turn-off operation of the 30, a distributor 50 for distributing a high voltage input from the ignition coil 40 to each cylinder, and the distributor 50 Ignition timing control device for the engine, characterized in that consisting of a spark plug (60) to ignite by causing an electric flame in accordance with the high voltage input from the). The ignition timing control unit 20 according to claim 1, wherein the ignition timing control unit 20 includes a latch pulse 22 for outputting an ignition point time point based on a first pulse signal input from the microcontroller 10, and the microcontroller ( A clear pulse 23 for outputting a reset time point based on the first pulse signal input from 10) and a first counter 25 counting the A2 period of the first pulse signal input from the microcontroller 10; ), A third counter 26 that counts the A1 period (dwell time) of the first pulse signal input from the microcontroller 10, and A3 corresponding to the A2 period input from the first counter 25. A ROM 27 for outputting a value of a period, a first latch circuit 28 for temporarily storing a value of the A3 period of the ROM 27 and outputting it at an ignition point time point, and the first latch circuit 28 Low signal during A3 period A second latch circuit 2A for outputting, a second latch circuit 29 for temporarily storing a value of an A1 period input from the third counter 26 and outputting it at the time when the dwell time starts; A pulse which synthesizes and outputs the signals input from the fourth counter 2B for outputting a high state signal during the period A1 input from the second latch circuit 29 and the second counter and the fourth counters 2A and 2B. An engine ignition timing control device comprising a synthesizing circuit 24 and a switch 21 switched according to a driver's selection.