JPS5923073A - Ignition timing controlling apparatus for automotive engine - Google Patents

Abstract

PURPOSE:To enable to use a knocking control apparatus for general purposes, by providing an output section capable of producing a voltage proportional to the intensity of knocking in both of analogue and digital manner. CONSTITUTION:A voltage corresponding to the intensity of vibration of an engine cylinder is produced by a knocking sensor 1 and a voltage proportional to the intensity of knocking is produced by detecting signals having frequencies belonging to a frequency range particular to knocking by means of a filter 2 and counting the knocking signals within a prescribed time period by means of a voltage converting circuit 3. Further, a digital output section 4a converts the output voltage of the voltage converting circuit 3 into a digital signal while an analogue output section 4b produces an analogue signal by converting the level of the output signal of the circuit 3. With such an arrangement, it is enabled to use a knocking control apparatus for general purposes.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ignition timing 1ii control device for an automobile engine. Regarding control 011 device.

Conventionally, in automatic i11 engines, knocking 4
In order to prevent and increase the efficiency and durability of the engine, do you want to install a non-slip on the engine body? When installed and detects non-king, t;L ignition timing? Some engines are equipped with an ignition timing control device that is equipped with a knock control device that outputs a delayed signal.

By the way, the ignition timing control device M for automobile engines uses an IC igniter? What analog type and microcomputer did you use? There is a digital type used, and the method is different depending on the manufacturer or [4i 111].

Therefore, the analog type and digital type 〇〇tsuking control devices are the first. If each part was manufactured separately, the cost would increase, so conventionally they were constructed from discrete parts.

As a result, the conventional non-king control device M has a large number of parts and a large mounting area. Therefore, due to the relationship with other automobile parts, installation locations were limited, and due to the reliability of the assembly, it was difficult to install it in the engine compartment, which has an extremely harsh atmosphere. In addition, in the discrete circuit, there is a problem that the final adjustment of circuit constants is troublesome because of the large variations in each component.

Therefore, in this invention, a non-king control device in an ignition timing control device for an automobile engine is designed to be Xa, and the mounting area of the circuit is 2 to 8. Is it possible to reduce the number of parts, reduce the number of parts, and assemble them? The purpose of this invention is to provide an inexpensive ignition timing control device that is easy to install, and the final circuit can be adjusted commercially.

For this purpose, the present invention provides a non-king sensor If? “J only? Passing σ
IJ L compared to the knocking strength,
1 voltage γ source IJE 7 Otsu, 1. Una1 IF conversion circuit and the output of this circuit? can be supplied to microcomputer systems. Digital blade part that converts L and signal V, and C
and an analog output section that converts it into a signal that can be supplied to the igniter. Two methods are available to use all control devices) η1S?
One thing to have is a knocking control device 1
Versatility (including hybrid 1C) VC
can. [The total percentage of sea urchins is 1&.

The ignition timer according to the present invention will be described below based on the drawings.
! A refreshing example of the 11141 device will be explained.

In the figure, the non-king sensor 1 is attached to the cylinder block of an engine up to 1 ton.This non-king sensor 1 includes all pressure oxygen elements, magnetic cup type sensors, etc., and responds to the strength of vibration of the engine cylinder. fCC voltage light is generated.

Therefore, the output from this non-king sensor 1 (g is the natural vibration VC of the engine when the engine is running normally)
Accordingly, a relatively small level of amplitude is output as a background ML sound. However, when knocking occurs,
When a signal in a certain frequency band suddenly peaks (+li is large,
It comes to be output from the non-king sensor 1 along with back M noise.

Is 2 the non-king sensor resonance frequency? at the center frequency,
1 is a filter that allows all signals in the frequency band present during knocking to pass through, and 3 is the knocking signal that passes through this filter 2r? Counting within a certain period of time, the number of non-king signals of 7, the strength of non-king, and the corresponding 1ζ and pressure? This is a voltage conversion circuit that generates voltage.

For example, the voltage conversion circuit 3 generates a pulse with an amplitude proportional to the non-king rate, based on the signal from the non-king sensor 1, and converts all of the pulses within a certain period of time.
By averaging the integral, it is possible to generate a DC voltage depending on the strength of knocking.

' a tf f Fh: Output γ from voltage conversion circuit 3
(1 stroke, microcomputer system 5 that controls the ignition timing control device)
If the input level l'lJ, t is converted into a signal in the range that matches the input current of the A/I) converter, it is used. i! This is a digital output section consisting of one circuit.

This digital cutting edge part 4a is input to the microcomputer system A5, and after A/D conversion is performed by, for example, an A/D converter, it is input to the microcomputer. Then, depending on the strength of the knocking, the micro controller turns on and off all power transistors for supplying one current to an ignition coil (not shown), even adjusting the timing of No. 1. It is designed to cause J[JI'e:M when igniting.

4b is the above 'acid pressure change cycle full? A signal level suitable for the igniter 6 is proportional to the non-king strength outputted from the 53.
It is B. .

When the output voltage of this analog output section 4b is inputted by the igniter fi VC, the IC igniter 6 outputs the output voltage of the analog output section 4b and becomes flill Ml.
111 pressure is applied, and ignition 1 occurs in response to strong non-king.
The phase of the 1η period system is made to shift by T.

-f: At υ, the engine's ignition timing will be delayed.

Furthermore, the output from the non-king sensor 1 (g) is also manually input to the sensor abnormality determining circuit 7. The sensor abnormality determining circuit 7
When there is no signal in the IQi group, 1: Detects the abnormality of the sensor and turns the sensor abnormal. I iA 7
When the output of H° is completed, voltage conversion 1 is detected.
1'il ll! a 3 d-rat ivy "A DC voltage of a constant level will be output. This will cause the microcomputer system 5 or 10 igniter 6 to output 1 when L9 is ignited.
υ' is always V 2, [time or delay 8, the occurrence of non-king is prevented by 1L.

It is possible to avoid damage to the engine and decrease in efficiency due to engine failure and engine failure due to the failure of the sensor.

The above actual/Ai examplekc oi-c tit, 7 il, 6
2, 'Itl+- conversion circuit 3, digital output) moon eave 4
a, γnarobo power supply 4 b: The non-king control device A is activated by the Fi-work sensor abnormality determination circuit 7.
is (11￥ formed 3, -'f: +~, this knocking control device f A ; di, one off j
iZi: Several semiconductor chips, designed to be integrated into J-. Furthermore, the IC-based knocking control device can be used to remove the earth and condensation from the outer fence as required by the 11 rules of VCi. L has been left behind,
In addition to this external resistor and capacitor km, the final circuit constant of M is adjusted by L. [It has been uploaded.

In addition, in the circuit of the above embodiment, voltage conversion times;
If the output voltage suddenly returns to the original level after the knocking has disappeared, there is a risk that the engine will go awry again.

-f, -, even if the voltage conversion circuit 3- is non-king or disappears, the configuration qtt is such that the output voltage slowly returns to the original V. A microcomputer or IO
The delay in ignition timing caused by the igniter VC gradually increases as the rC becomes smaller.

Depending on the first q configuration of the igniter 6, the analog output section 4b may be configured to output a pulse signal for phase control depending on the strength of knocking.

As described above, in the ignition timing control device according to the present invention, since a digital output section and an analog output section are provided in the knocking control device, it is possible to use either a digital type or an analog type. Which ignition timing side? a (A common non-king control device can be used for one device. Therefore, if the non-king control device is integrated into an IC, the number of parts will be reduced and assembly will be easier. As a result, the assembly man-hours can be reduced, and the cost can be significantly reduced due to the versatility.In addition, the mounting area of the circuit has been reduced due to the conversion to C, and the extra edition will be published in Yang's 9R. f
Since it reduces the amount of heat and can also be installed inside the high temperature engine room,
This eliminates the need for wiring, etc., and improves installation work efficiency. With the advent of IC, there is less variation in each element compared to circuits using disk IJ-1 and single VC.''1↓Final circuit rule 1. +1 adjustment also t
ri) It has the effect of becoming simple.

In) The most important 1ltU drawing of the drawing is the ignition timing index 1 of the automobile engine according to the present invention.
FIG. 1 is a diagram showing one embodiment of the device.

■...Non-king sensor, 2...Filter, 3...
・η is a positive conversion circuit, 4a...f digital output)'+
Il, 4 b - Analog output section, A... Knocking control device.

Claims (2)

[Claims] (1) The output from the knocking prevention method introduced in automobile engines is 71. A filter that allows all of the knocking signals to pass through, and a mJF change circuit that generates a signal proportional to the low level of the knocking signal.
The digital output 1 of this 11℃ pressure conversion circuit converts a signal V that can be supplied to the power microcomputer system.
A non-king control device consisting of an analog output section that converts the output of the upper pressure conversion circuit into an output signal that can be supplied to the igniter is provided.
/Characteristics of automatic JK engine ignition JtJJ
fliUT? tJ g j(,i. (2) Upper 'A self-notgging control'A I>
';r' is IIM output from knocking 4 prevention
Is there something wrong with the issue? Detection and judgment of abnormal sound of seven sensors - L2, sensor abnormality VC is ignition timing? A signal not to make any delay?
Sensor abnormality judgment circuit that occurs?・What I learned about Ir1ti'
The 1tll system for controlling the ignition timing of an automobile engine according to the above item 1, wherein the range of the l allowance requirement is based on ct+f.