CN2760235Y - Engine oil alarm control circuit - Google Patents

Abstract

The utility model discloses an engine oil alarm control circuit which comprises an ignition coil, a sensor loop, a switch loop and a charging loop. The switch loop is connected with ground by the positive pole of controlled silicon Q1, and the negative pole is connected with the primary pole of the ignition coil. A triggering end is connected with a resistor R1, and filter capacitors C1, C2 are respectively connected between the positive pole and the negative pole of the controlled silicon Q1 and between the negative pole and the triggering end. The charging circuit is connected with a diode D1 by one resistor R3 through one end of a charging capacitor C3. The positive end of the diode D1 is connected with the primary pole of the ignition coil. The connection point of the resistor R3 and the diode D1 is connected with the resistor R1. The sensor loop is connected with ground by one end of a sensor B, and the other end is connected to the primary pole of the ignition coil by the series connection with a luminous diode D3, the diode D2 and one resistor R2. The connection point of the diode D2 and the resistor R2 is connected with the other end of the charging capacitor C3. The utility model has the advantage that the utility model can avoid the phenomena of the engine flameout or hunting caused by the misoperation of the sensor. Meanwhile, the utility model can remind to refuel, has simple structure and does not need the large adjustment on the basis of the primitive technical structure.

Description

The machine oil alarm control circuit

Technical field

The utility model relates to the machine oil alarm control circuit of general-purpose petrol engine, especially the machine oil alarm control circuit that is made of engine igniting coil, sensor loop, switch loop and charge circuit.

Background technique

General machine oil alarm control circuit as shown in Figure 1, is made of spark coil L, sensor loop, switch loop and charge circuit; The switch loop is made of controllable silicon Q1, trigger end connecting resistance R1, and when controllable silicon Q1 conducting, the elementary ground connection of spark coil is realized flame-out; Charge circuit is made of charging capacitor C3, the diode D1 that plays unidirectional conducting effect, relies on the elementary charging of spark coil, gives the controllable silicon Q1 discharge in switch loop and the conducting of control controllable silicon Q1; Sensor loop is connected to by sensor B, diode D2, R2 that spark coil is elementary to be constituted; The negative pole of the charging capacitor C3 of charge circuit connects the contact of diode D2 and R2, after having only sensor B conducting ground connection, entire circuit could be worked, after machine oil sensor B connects with ground, because of the waveform of ignitor coil is a sinusoidal waveform, electric current will charge to charging capacitor C3 through diode D1 when waveform is positive half cycle, when waveform is negative half period, charging capacitor C3 will discharge through R1, because of the big guiding discharge time of R1 resistance value comparatively slow, the time-delay that forms more than several seconds moves again after avoiding motor just flame-out automatically, thereby Q1 realizes conducting flame-out when discharge current reaches the trigger current of controllable silicon Q1.But above-mentioned control circuit causes engine misses or tourist bus phenomenon because of the sensor misoperation easily, and not prompting.

The model utility content

The purpose of this utility model is: a kind of machine oil alarm control circuit is provided, makes not because of the sensor misoperation causes engine misses or tourist bus phenomenon, and prompting adds machine oil.

In order to achieve the above object, machine oil alarm control circuit of the present utility model increases the resistance of a charge circuit on the basis of circuit common, the time lengthening that charging capacitor is full of, avoid causing engine misses or tourist bus phenomenon because of the sensor misoperation, increase the serial connection light emitting diode in sensor loop simultaneously, make when needing to refuel and remind.

The technical solution of the utility model is: on the machine oil alarm control circuit that comprises spark coil, sensor loop, switch loop and charge circuit, the switch loop is by the positive level ground connection of controllable silicon Q1, bear the elementary of level contact fire coil, trigger end connecting resistance R1, be parallel with filter capacitor C1, C2 respectively between the positive and negative level of Q1 and between negative level and the trigger end, when controllable silicon Q1 conducting, the elementary ground connection of spark coil is realized flame-out; Described charge circuit connects diode D1 by charging capacitor C3 one end by resistance R 3, diode D1 anode tie point fire coil is elementary, resistance R 3 is connected resistance R 1 with the contact of diode D1, charge circuit relies on fire coil to give charging capacitor C3 charging, discharges and the conducting of control controllable silicon Q1 for the controllable silicon Q1 in switch loop; Sensor loop is by sensor B one end ground connection, and it is elementary that the other end is connected to spark coil after by serial connection light emitting diode D3, diode D2 and resistance R 2, and diode D2 is connected the other end of charging capacitor C3 with the contact of resistance R 2.

The utility model has the advantages that: simple in structure, suitable, on the basis of original technical pattern, need not big adjustment.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the machine oil alarm control circuit structural drawing of prior art.

Fig. 2 is a machine oil alarm control circuit structural drawing of the present utility model.

Embodiment

Referring to accompanying drawing 1, machine oil alarm control circuit of the present utility model comprises spark coil L, sensor loop, switch loop and charge circuit, and spark coil is controlled its high pressure output by dedicated control circuit; The elementary of level contact fire coil born, trigger end connecting resistance R1 by the positive level ground connection of controllable silicon Q1 in the switch loop, be parallel with filter capacitor C1, C2 respectively between the positive and negative level of Q1 and between negative level and the trigger end, when controllable silicon Q1 conducting, the elementary ground connection of spark coil is realized flame-out; Described charge circuit connects diode D1 by charging capacitor C3 one end by series resistors R3, diode D1 anode tie point fire coil is elementary, resistance R 3 is connected resistance R 1 with the contact of diode D1, charge circuit relies on fire coil to give charging capacitor C3 charging, discharges and the conducting of control controllable silicon Q1 for the controllable silicon Q1 in switch loop; Sensor loop is by sensor B one end ground connection, and it is elementary that the other end is connected to spark coil after by serial connection light emitting diode D3, diode D2 and resistance R 2, and diode D2 is connected the other end of charging capacitor C3 with the contact of resistance R 2.

Light emitting diode D3 is with bright after machine oil sensor B connects with ground, the bright expression of lamp is worked as machine oil and is reached in the regulation oiling scope, be convenient to point out the user to add machine oil, after having only sensor B conducting ground connection, entire circuit could be worked, after machine oil sensor B connects with ground, because of the waveform of ignitor coil is a sinusoidal waveform, electric current will charge to charging capacitor C3 through diode D1 when waveform is positive half cycle, when waveform is negative half period, charging capacitor C3 will discharge through R1, because of the big guiding discharge time of R1 resistance value comparatively slow, the time-delay that forms more than several seconds moves again after avoiding motor just flame-out automatically, thereby Q1 realizes conducting flame-out when discharge current reaches the trigger current of controllable silicon Q1; So electric current will be through diode D1, R3 to capacitor C 3 chargings when waveform is positive half cycle, so the time that when charging electric capacity is full of because of increase resistance R 3 before capacitor C 3 will postpone more than the 1S, can avoid causing engine misses or tourist bus phenomenon because of the sensor misoperation.C3 will discharge through R1 when waveform is negative half period, it is on the basis of last figure that so the increase of R1 resistance value is comparatively slow discharge time, can make the user have time enough that electric consumer is disconnected the back to motor increase machine oil with the time-delay that forms more than a few minutes, thereby Q1 realize conducting flame-out when discharge current reaches the trigger current of controllable silicon Q1.

Claims (1)

1. machine oil alarm control circuit, comprise spark coil, sensor loop, switch loop and charge circuit, the switch loop is by the positive level ground connection of controllable silicon Q1, bear the elementary of level contact fire coil, trigger end connecting resistance R1, be parallel with filter capacitor C1 respectively between the positive and negative level of Q1 and between negative level and the trigger end, C2, when controllable silicon Q1 conducting, the elementary ground connection of spark coil, realize flame-out, it is characterized in that: described charge circuit connects diode D1 by charging capacitor C3 one end by resistance R 3, diode D1 anode tie point fire coil is elementary, resistance R 3 is connected resistance R 1 with the contact of diode D1, and charge circuit relies on fire coil to give charging capacitor C3 charging, discharges and the conducting of control controllable silicon Q1 for the controllable silicon Q1 in switch loop; Sensor loop is by sensor B one end ground connection, and it is elementary that the other end is connected to spark coil after by serial connection light emitting diode D3, diode D2 and resistance R 2, and diode D2 is connected the other end of charging capacitor C3 with the contact of resistance R 2.

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