JPS6233989Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an ignition timing control device for an internal combustion engine that controls ignition timing by detecting a knock in the engine.

Detects engine knocks from internal combustion engine vibrations, etc.
Ignition timing control devices are known that retard the ignition timing based on the detected amount and the like. FIG. 1 shows the configuration of an ignition timing control device installed in an automobile.

In the figure, 1 is an internal combustion engine, 2 is a knock sensor attached to the internal combustion engine 1 and detects a knock in the engine;
Reference numeral 3 indicates a knock control device that determines the knock intensity, frequency, etc. from the output signal of the knock sensor 2, and calculates the amount of ignition timing retardation for controlling the knock. Reference numeral 4 is installed in the internal combustion engine 1 and is used to generate an ignition signal and ignite the engine. This is a distributor that performs power distribution, etc. Although not shown in the drawing, an igniter is built into the distributor 4, and controls the ignition timing according to the output signal of the knock control device 3, and energizes the ignition coil 6. It is intermittent and generates high voltage.

In such a configuration, when the internal combustion engine 1 does not generate a knock, the igniter energizes the ignition coil 6 intermittently based on the ignition signal generated by the distributor 4, thereby generating a high voltage.
Then, the distributor 4 distributes the high voltage to the spark plugs in each cylinder of the internal combustion engine 1 to ignite the spark plugs.
Now, when a knock occurs in the internal combustion engine 1, the knock control device 3 determines the knock intensity, frequency, etc. from the output signal of the knock sensor 2, calculates an ignition timing retard amount based on the knock, and outputs a retard signal. and,
As a result of the igniter built into the distributor 4 retarding the ignition timing based on the retard signal, the knock can be controlled.

Conventionally, the knock control device 3 has been mounted on the vehicle body, so the wiring for the knock sensor 2 and the igniter is long, and the wiring must be routed from the vehicle body to the engine. The longer the wiring, the more likely external noise such as ignition noise will be superimposed, and the wiring from the vehicle body to the engine has the disadvantage that it is more likely to break due to rotational vibration of the engine. In particular, since the signal level of the output signal line of the knock sensor 2 is low and the impedance is high, the longer the signal line becomes, the greater the signal level loss becomes, and the noise becomes more likely to be superimposed. Therefore, it is necessary that the output signal line of the knock sensor 2 be input to the knock control device over the shortest distance.

Therefore, in order to solve the above problem, this invention attaches the knock control device to the side of the distributor and connects the knock sensor output signal line directly to the knock controller without introducing it inside the distributor. This makes it possible to shorten the wiring for the knock sensor and the knock sensor, prevent disconnection failures in the wiring, and particularly reduce noise superimposed on the signal line of the knock sensor.

FIG. 2 shows an embodiment of the configuration of a distributor according to this invention. In the figure, the same symbols as in FIG. 1 indicate the same parts. 5 is an igniter built into the distributor 4. The knock control device 3 is fixed to the side surface of the distributor 4 with screws 7. Therefore, the wiring between the knock timing device 3 and the igniter 5 and between the knock sensor 2 is as follows.
Since the knock control device 3 is attached to the internal combustion engine 1 via the distributor 4, the time can be significantly shortened. Moreover, even if rotational vibration occurs in the internal combustion engine 1,
Since the knock control device 3 is integrated with the internal combustion engine 1, the wiring will not be disconnected.

The igniter 5 and the knock control device 3 are connected by wiring through the outer wall of the distributor 4, but the wiring connection between the knock sensor 2 and the knock control device 3 is through a connector 3 on the side of the knock control device 3.
1, and the input is directly input to the connector 31 of the knock control device 3 without inserting any wiring into the distributor 4, so that the influence of noise caused by flying sparks in the high voltage power distribution section of the distributor 4 can be reduced.

As described above, according to this invention, it is possible to shorten the wiring from the knock control device to the igniter and the knock sensor, which has the effect of reducing noise superimposition on the signal line. It also has the effect of being able to prevent it from happening.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram of a conventional ignition timing control device installed in an automobile, and Fig. 2 is a perspective view showing the configuration of a distributor equipped with an igniter and a knock control device in the ignition timing control device according to this invention. It is. In addition, the same reference numerals in the figures indicate the same parts, 1 is the engine, 2 is the knock sensor, 3 is the knock control device, and 4 is the knock sensor.
5 is a distributor, 5 is an igniter, and 31 is a connector.

Claims (1)

[Scope of utility model registration request] A knock sensor detects a knock in the engine, a knock control device detects a knock from the output signal of the knock sensor and outputs a retard signal, and a knock control device generates an ignition signal synchronized with the rotation of the engine, and the high voltage output from the ignition coil is connected to the engine. a distributor that distributes power to each cylinder; an igniter built into the distributor that retards the ignition signal generated from the distributor in accordance with the output signal of the knock control device to intermittently energize the ignition coil; In the ignition timing control device, the knock control device is attached to the outer surface of the housing of the distributor, and the knock control device is provided with a connector for receiving an output signal line from the knock sensor, so that the output signal line of the knock sensor is connected to the disk. An ignition timing control device for an internal combustion engine, characterized in that the ignition timing control device for an internal combustion engine is connected directly to the above-mentioned knob control device without being introduced into the interior of the tributator.