RU24247U1 - DEVICE FOR DETERMINING THE IGNITION ANGLE OF IGNITION IN THE INTERNAL COMBUSTION ENGINE - Google Patents

Abstract

A device for determining the ignition timing in an internal combustion engine, comprising a housing equipped with a compartment for laying the connecting wires and a matrix arranged therein, made in the form of LEDs connected in series-parallel between them, an input zener diode, a protective diode, a single pulse shaper with manual regulator of the flash duration of the LEDs, the switch and connecting wires providing electrical connection, characterized in that copulating input current limiting resistor and a diode limiter, a common point of their connection is connected to input of the single pulse with automatic adjustment of the length of the flash LEDs, and power to a single pulse generator is supplied via a protective diode, and to switch the power supply bus.

Description

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IPC F 02 P 17/06

DEVICE FOR DETERMINING THE IGNITION ANGLE OF IGNITION IN THE INTERNAL COMBUSTION ENGINE

The invention relates to the field of mechanical engineering and can be used to control the technical condition of internal combustion engines, in particular to determine the ignition timing in an internal combustion engine.

A device is known for determining the ignition timing in an internal combustion engine, comprising a housing and a pulsed light source located therein, made in the form of interconnected LEDs, a control circuit comprising a smoothing filter, a pulse shaper, a switch, and connecting wires that provide electrical communication.

However, the presence in the device of the pulse shaper with a constant duration of the order of 100 ms does not allow more fully use the light intensity of the parallel-connected LEDs. In addition, the parallel connection of the LEDs in the presented diagram of the device causes an increase in power consumption from the power source. In the multi-spark mode of the ignition system, the device responds to every incoming pulse, which reduces the accuracy of determining the ignition timing in the internal combustion engine.

The closest technical solution to the proposed utility model is a device for determining the ignition timing in an internal combustion engine, comprising a housing equipped with a compartment for laying the connecting wires, and a matrix arranged in it in the form of LEDs connected in series-parallel between them, the entrance is oftentimes a zener diode, a protective diode, a single pulse shaper with a manual regulator of the LED flash duration, a switch and connecting wires, echivayuschie electrical connection.

The disadvantages of this technical solution are the complexity of manually setting the flash duration of the LEDs to obtain the clarity of the mark on the engine flywheel and the possible subjective error associated with this, which can reduce the accuracy of determining the ignition timing in an internal combustion engine. And the off-duty zener diode located at the input of the device circuit does not allow to expand the range of supply voltages of the device. In addition, powering the switch through a protective diode reduces the light intensity of the LEDs.

The objective of the proposed utility model is to reduce the complexity, increase operating convenience and accuracy of determining the ignition timing in the internal combustion engine, expand the range of the supply voltage of the device, increase the light intensity of the LEDs.

To achieve this technical result, in a device for determining the ignition timing in an internal combustion engine, comprising a housing equipped with a compartment for laying the connecting wires providing electrical communication and placed therein, a matrix made in the form of LEDs connected in series-parallel between each other, in the device circuit an input current-limiting resistor and a diode driver are installed, and the common point of their connection is connected to the input of a single pulse shaper from the machine matic adjustment LEDs flash duration, and power to a single pulse generator is supplied via a protective diode, and to switch the power supply bus.

Distinctive features of the proposed device for determining the ignition timing in the internal combustion engine from the above known, closest to it, is the introduction to the circuit of the device for automatic adjustment of the flash duration of the LEDs, where the control signal is the engine speed (N), which is associated with duration of a flash of light (teen.) experimentally established dependence tBcn. 110N The presence in the device of automatic adjustment of flash duration light emitting diodes, provides a decrease in labor intensity, an increase in operating convenience and accuracy in determining the ignition timing in an internal combustion engine. Installing a diode driver of the device circuit at the input of the device expands the supply voltage range of the device, and the switch power directly from the power supply bus increases the light intensity of the LEDs. The input current-limiting resistor protects the input circuits of the device from dangerous pickups of high-voltage pulses.

Figure 1 presents a General view of a device for determining the ignition timing in an internal combustion engine.

In FIG. 2 is a diagram of a device.

The device consists of a housing 1, in which a matrix of LEDs 2 is placed, and a device diagram made on a printed circuit board 3, wires 4, 5 and 6 with clamps (not shown conventionally in the drawing) laid in compartment 7 of housing 1, with wires 4 and 5 provide electrical communication with the power source 8, and wire b is used to transmit high-voltage pulse pickup to the input circuit of the device. The device circuit consists of a single pulse shaper 9 with automatic adjustment of the flash duration of the LEDs 10, the output of which is connected to the switch 11. The power circuit of the single pulse shaper 9, with automatic adjustment of the flash duration of the LEDs 10 through a protective diode 12 is connected to the wire 4. The switch 11 and the anodes the matrix of LEDs 2 are connected to wire 4, and the cathodes of the matrix of LEDs are connected through current-limiting resistors 13 and switch 11 to wire 5. Wire 6 is connected to current-limiting m resistor 14, the diode limiter 15 and the input of the single pulse 9 with automatic adjustment of the LEDs 10 flash duration.

The device operates as follows.

Wire 4 is connected to the + terminal, and wire 5 to the terminal is the power source 8. The protective diode 12 protects the device circuit from power reversal and if the polarity of the connection is changed, the device will not work, but this will not lead to its failure. Wire 6 is connected with a clamp to the insulation of the high-voltage cable of the 1st engine spark plug. The high-voltage pulse leads through the wire 6 are fed to the input of a single pulse shaper 9 with automatic adjustment of the flash duration of the LEDs 10 through a current-saving resistor 14 and a diode limiter 15, which produces positive and negative peaks of the high-voltage pulse pickups at the voltage level of the power source 8. Only from the first positive surge (even in multi-Isf mode) using a single pulse shaper 9 only one pulse is formed, the duration of which, and with Consistently, the illumination and clarity of the mark on the engine flywheel varies depending on the speed of the crankshaft - automatic adjustment of the flash duration of the LEDs 10. From the output of a single pulse shaper 9 with automatic adjustment of the duration 10, a single pulse with a set duration arrives at the switch 11, which connects the cathodes matrix of LEDs 2 through current-limiting resistors 13 and wire 5 to the bus - power supply 8, when this occurs a flash of light of the matrix LEDs 2, which illuminates synchronously from the moment of the beginning of the spark discharge in the first spark plug of the engine, a flywheel with a mark and a fad mark on the engine casing. Mismatch marks indicates the need to adjust the ignition timing of the engine.

Thus, the presence in the proposed device of automatic adjustment of the duration of the LED flash reduces the complexity, improves operating convenience and the accuracy of determining the angle of ignition firing in the internal combustion engine. Installing a diode driver of the device circuit at the input of the device expands the supply voltage range of the device, and the switch power directly from the power supply bus increases the light intensity of the LEDs. The input current-limiting resistor protects the input circuits of the device from dangerous pickups of high-voltage pulses.

The proposed device allows you to use it to check the health of the ignition control regulator, as well as to monitor the operation of valves, camshaft and other parts in an internal combustion engine.

Used sources:

1. Patent of Russia No. 2122649, cl. F 02 P 17/06, 1997.

Claims (1)

A device for determining the ignition timing in an internal combustion engine, comprising a housing equipped with a compartment for laying the connecting wires and a matrix arranged therein, made in the form of LEDs connected in series-parallel between them, an input zener diode, a protective diode, a single pulse shaper with manual regulator of the flash duration of the LEDs, the switch and connecting wires providing electrical connection, characterized in that copulating input current limiting resistor and a diode limiter, a common point of their connection is connected to input of the single pulse with automatic adjustment of the length of the flash LEDs, and power to a single pulse generator is supplied via a protective diode, and to switch the power supply bus.