阅读说明：本技术 具有复合保护功能的汽油机点火装置 (Gasoline engine ignition device with composite protection function ) 是由 徐宝钧 张斌 郑梅君 于 2020-12-31 设计创作，主要内容包括：本申请提供一种具有复合保护功能的汽油机点火装置,包括：点火输出电路,用于输出点火所需的电压；气体报警电路,用于根据气体检测结果输出对应的控制信号；断油保护电路,用于根据供油检测结果输出对应的控制信号；点火控制器,用于根据所述气体报警电路或/和所述断油保护电路反馈的控制信号控制所述点火输出电路；其中,所述点火输出电路、气体报警电路和断电保护电路分别电性连接至所述点火控制器。本申请的有益之处在于提供一种兼顾了有害气体保护功能和断油保护功能的具有复合保护功能的汽油机点火装置。(The application provides a gasoline engine ignition with compound protect function, includes: the ignition output circuit is used for outputting voltage required by ignition; the gas alarm circuit is used for outputting a corresponding control signal according to a gas detection result; the oil cut-off protection circuit is used for outputting a corresponding control signal according to an oil supply detection result; the ignition controller is used for controlling the ignition output circuit according to the control signal fed back by the gas alarm circuit or/and the oil cut-off protection circuit; the ignition output circuit, the gas alarm circuit and the power-off protection circuit are respectively and electrically connected to the ignition controller. The ignition device has the beneficial effects that the ignition device of the gasoline engine with the composite protection function has the harmful gas protection function and the fuel cut-off protection function.)

1. The utility model provides a gasoline engine ignition with compound protect function which characterized in that:

the speed-limiting ignition device with the composite protection function comprises:

the ignition output circuit is used for outputting voltage required by ignition;

the gas alarm circuit is used for outputting a corresponding control signal according to a gas detection result;

the oil cut-off protection circuit is used for outputting a corresponding control signal according to an oil supply detection result;

the ignition controller is used for controlling the ignition output circuit according to the control signal fed back by the gas alarm circuit or/and the oil cut-off protection circuit;

the ignition output circuit, the gas alarm circuit and the power-off protection circuit are respectively and electrically connected to the ignition controller.

2. The ignition device of gasoline engine with compound protection function as claimed in claim 1, wherein:

the speed-limiting ignition device with the composite protection function further comprises:

a power supply circuit for supplying power to at least the ignition controller;

the power circuit is electrically connected to the ignition controller.

3. The ignition device of gasoline engine with compound protection function as claimed in claim 1, wherein:

the trigger signal circuit is used for sending an ignition trigger signal to the ignition controller;

the trigger signal circuit is electrically connected to the ignition controller so that the ignition controller operates an ignition program after receiving an ignition trigger signal.

4. The ignition device of gasoline engine with compound protection function as claimed in claim 1, wherein:

a misfire signal circuit for sending a signal representative of a misfire of an igniter to the ignition control;

the flameout signal circuit is electrically connected to the ignition controller so that the ignition controller runs a flameout program after receiving a signal representing a flameout command.

5. The ignition device of a gasoline engine with a compound protection function according to any one of claims 1 to 4, characterized in that:

the ignition output circuit includes:

the charging coil is used for generating electric energy required by ignition;

the energy storage capacitor is used for storing electric energy required by ignition;

the primary coil is used for storing electric energy by using the energy storage capacitor to generate a magnetic field;

the secondary coil is coupled with the primary coil to generate voltage required for ignition under the action of a magnetic field generated by the primary coil;

and the silicon controlled switch is used for switching on or off under the control of the ignition controller so as to control the electric energy release of the energy storage capacitor.

6. The ignition device of gasoline engine with compound protection function as claimed in claim 5, wherein:

the ignition output circuit further includes:

a first diode connected between the charging coil and the energy storage capacitor.

7. The ignition device of gasoline engine with compound protection function as claimed in claim 6, wherein:

the ignition output circuit further includes:

a second diode connected between the primary coil and the energy storage capacitor.

8. The ignition device of gasoline engine with compound protection function as claimed in claim 7, wherein:

the ignition output circuit further includes:

a first resistor disposed in parallel with the charging coil.

9. The ignition device of a gasoline engine with a compound protection function according to any one of claims 1 to 4, characterized in that:

the gas alarm circuit includes:

at least one switch end of the gas induction switch is electrically connected with one control input end of the charging controller, so that the gas induction switch enables one control input end of the charging controller to be at a low level when a gas detection result exceeds a preset standard.

10. The ignition device of a gasoline engine with a compound protection function according to any one of claims 1 to 4, characterized in that:

the fuel cut-off protection circuit includes:

and at least one switch end of the oil cut-off inductive switch is electrically connected with one control input end of the charging controller, so that the oil cut-off inductive switch enables one control input end of the charging controller to be at a low level when a gas detection result exceeds a preset standard.

Technical Field

The application relates to a gasoline engine ignition device, in particular to a gasoline engine ignition device with a compound protection function.

Background

The traditional analog igniter and digital igniter of the small gasoline engine do not have the function of exceeding the standard of harmful gas and extinguishing fire. When harmful gases such as carbon monoxide in the discharged tail gas exceed the standard, no effective identification and flameout function exists, and great potential safety hazard exists.

The traditional oil cut-off protection function is that the coil is directly short-circuited by grounding the oil protection switch, once the oil protection switch is switched off, the ignition is immediately recovered to be normal, and the flameout mode has great potential safety hazard in actual operation.

Disclosure of Invention

In order to solve the defects of the prior art, the application provides a gasoline engine ignition device with a compound protection function, which comprises: the ignition output circuit is used for outputting voltage required by ignition; the gas alarm circuit is used for outputting a corresponding control signal according to a gas detection result; the oil cut-off protection circuit is used for outputting a corresponding control signal according to an oil supply detection result; the ignition controller is used for controlling the ignition output circuit according to the control signal fed back by the gas alarm circuit or/and the oil cut-off protection circuit; the ignition output circuit, the gas alarm circuit and the power-off protection circuit are respectively and electrically connected to the ignition controller.

Further, the speed-limiting ignition device with the composite protection function further comprises: a power supply circuit for supplying power to at least the ignition controller; the power circuit is electrically connected to the ignition controller.

Further, a trigger signal circuit for sending an ignition trigger signal to the ignition controller; the trigger signal circuit is electrically connected to the ignition controller so that the ignition controller operates an ignition program after receiving an ignition trigger signal.

Further, a misfire signal circuit for sending a signal representative of a misfire of an igniter to the ignition control; the flameout signal circuit is electrically connected to the ignition controller.

Further, the ignition output circuit includes: the charging coil is used for generating electric energy required by ignition; the energy storage capacitor is used for storing electric energy required by ignition; the primary coil is used for storing electric energy by using the energy storage capacitor to generate a magnetic field; the secondary coil is coupled with the primary coil to generate voltage required for ignition under the action of a magnetic field generated by the primary coil; and the silicon controlled switch is used for switching on or off under the control of the ignition controller so as to control the electric energy release of the energy storage capacitor.

Further, the ignition output circuit further includes: a first diode connected between the charging coil and the energy storage capacitor.

Further, the ignition output circuit further includes: a second diode connected between the primary coil and the energy storage capacitor.

Further, the ignition output circuit further includes: a first resistor disposed in parallel with the charging coil.

Further, the gas alarm circuit includes: at least one switch end of the gas induction switch is electrically connected with one control input end of the charging controller, so that the gas induction switch enables one control input end of the charging controller to be at a low level when a gas detection result exceeds a preset standard.

Further, the fuel cut protection circuit includes: and at least one switch end of the oil cut-off inductive switch is electrically connected with one control input end of the charging controller, so that the oil cut-off inductive switch enables one control input end of the charging controller to be at a low level when a gas detection result exceeds a preset standard.

The application has the advantages that: the ignition device of the gasoline engine with the composite protection function gives consideration to the protection function of harmful gas and the oil cut-off protection function.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:

FIG. 1 is a schematic block diagram of the circuit components of a gasoline engine ignition device with a compound protection function according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an ignition output circuit according to one embodiment of the present application;

FIG. 3 is a schematic diagram of a gas alarm circuit according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a fuel cut-off protection circuit according to an embodiment of the present application.

The meaning of the reference symbols in the figures:

the ignition device comprises a gasoline engine ignition device 100 with a compound protection function, an ignition output circuit 101, a gas alarm circuit 102, a fuel cut-off protection circuit 103, an ignition controller 104, a power supply circuit 105, a trigger signal circuit 106, a flameout signal circuit 107, a first control output interface P1, a first control input interface P2 and a second control input interface P3;

a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first diode D1, a second diode D2, an energy storage capacitor C1, a thyristor switch Q1, a charging coil L1, a primary coil L2 and a secondary coil L3;

the gas sensing circuit comprises a gas sensing switch J1, a fifth resistor R5, a sixth resistor R6, a third diode D3, a second voltage regulator tube D4 and a second capacitor C2;

the oil-cut inductive switch J2, seventh resistance R7, eighth resistance R8, third capacitance C3, second voltage regulator D5.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 to 4, the ignition device 100 of the gasoline engine having a compound protection function of the present application includes: ignition output circuit 101, gas alarm circuit 102, fuel cut-off protection circuit 103, ignition controller 104.

The ignition output circuit 101 is used for outputting voltage required by ignition, and the gas alarm circuit 102 is used for outputting a corresponding control signal according to a gas detection result; the oil cut-off protection circuit 103 is used for outputting a corresponding control signal according to an oil supply detection result; the ignition controller 104 is used for controlling the ignition output circuit 101 according to control signals fed back by the gas alarm circuit 102 or/and the oil cut-off protection circuit 103; the ignition output circuit 101, the gas alarm circuit 102 and the power-off protection circuit are electrically connected to the ignition controller 104, specifically, they are respectively connected to the first control output terminal P1, the first control input terminal P2 and the second control input terminal P3 of the ignition controller 104.

As a more specific aspect, the gasoline engine ignition device 100 with a compound protection function of the present application further includes: a power supply circuit 105, a trigger signal circuit 106, and a misfire signal circuit 107.

A power supply circuit 105 for supplying power to at least the ignition controller 104; the power supply circuit 105 is electrically connected to the ignition controller 104.

The trigger signal circuit 106 is configured to send an ignition trigger signal to the ignition controller 104; the trigger signal circuit 106 is electrically connected to the ignition controller 104 to enable the ignition controller 104 to run an ignition process after receiving an ignition trigger signal.

The flameout signal circuit 107 is used for sending a signal representing flameout of the igniter to the ignition control; the misfire signal circuit 107 is electrically connected to the ignition controller 104. The trigger signal circuit 106 and the misfire signal circuit 107 are used for providing signal feedback for controlling the ignition controller 104.

The flameout signal circuit is used for pressing a flameout switch when an external expected igniter is flameout, and pulling down (low level) the flameout function port of the ignition controller which is originally in a pull-up (high level) state to form a flameout signal, so that the ignition controller operates a flameout program after receiving the flameout signal.

Referring to fig. 2, as a more specific aspect, the ignition output circuit 101 includes: the device comprises a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first diode D2, a second diode, an energy storage power supply C1, a thyristor switch Q1, a charging coil L1, a primary coil L2 and a secondary coil L3.

One end of the first resistor R1 is connected to one end of the charging coil L1 and the anode of the first diode D2, and the other end of the first resistor R1 is grounded. The cathode of the first diode D2 is connected to the anode of the thyristor switch Q1, the energy storage power supply C1 and one end of the fourth resistor R4; the other end of the energy storage power supply C1 is connected to the other end of the fourth resistor R4 and one end of the primary coil L2. The other end of the second resistor R2 is connected to a first control output terminal P1 of the ignition controller 104. The other end of the third resistor R3 is connected to the cathode of the thyristor Q1 and to ground.

Equivalently, the first diode D2 is connected between the charging coil L1 and the energy storage power supply C1; the second diode is connected between the primary coil L2 and the energy storage power supply C1; a first resistor R1 is arranged in parallel with the charging coil L1.

With the above scheme, the charging coil L1 can be used to generate the electric energy required for ignition; the energy storage power supply C1 may be used to store the electrical energy required for ignition; the primary coil L2 may be used to generate a magnetic field using the stored energy power supply C1 to store electrical energy; a secondary coil L3 may be used to couple with the primary coil L2 to generate the voltage required for ignition under the action of the magnetic field generated by the primary coil L2; a thyristor switch Q1 may be used to turn on and off under the control of the ignition controller 104 to control the discharge of electrical energy from the stored energy power supply C1.

Referring to fig. 3, as a more specific aspect, the gas alarm circuit 102 includes: the gas sensing circuit comprises a gas sensing switch J1, a fifth resistor R5, a sixth resistor R6, a third diode D3, a second voltage regulator tube D5 and a second capacitor C2.

One switch end of the gas sensing switch J1 is grounded, the other switch end of the gas sensing switch J1 is connected to the cathode of a third diode D3, and the anode of the third diode D3 is connected to the cathode of the first voltage regulator tube, a second capacitor C2 and a fifth resistor R5; the anode of the first voltage regulator tube and the other end of the second capacitor C2 are grounded, and the other end of the fifth resistor R5 is connected with the sixth resistor R6 and the first control input end P2 of the ignition controller 104; the other end of the sixth resistor R6 is connected to the control circuit voltage source Vcc.

Preferably, the gas-sensitive switch J1 is a carbon monoxide-sensitive switch.

Through the above circuit scheme, at least one switch terminal of the gas sensing switch J1 is electrically connected to a control input terminal of the charge controller, so that the gas sensing switch J1 sets a control input terminal of the charge controller to a low level when the gas detection result exceeds a preset standard.

Referring to fig. 4, as a more specific aspect, the fuel cut protection circuit 103 includes: the oil-cut inductive switch J2, a seventh resistor R7, an eighth resistor R8, a third capacitor C3 and a second voltage regulator tube D5D 4.

One switch end of the oil-cut sensing switch J2 is grounded, the other switch end of the oil-cut sensing switch J2 is connected to the negative electrode of the second voltage-regulator tube D5D4 and the seventh resistor R7, the positive electrode of the second voltage-regulator tube D5D4 is grounded, and the other end of the seventh resistor R7 is connected to the second capacitor, the eighth resistor R8 and the second control input end P3 of the ignition controller 104. The other end of the eighth resistor R8 is connected to the control circuit voltage source Vcc.

Through the above circuit scheme, at least one switch end of the oil-cut sensing switch J2 is electrically connected to a control input end of the charge controller, so that the oil-cut sensing switch J2 makes a control input end of the charge controller low when the gas detection result exceeds a preset standard.

When the gasoline engine works normally, the igniter senses a group of alternating voltage signals, and the alternating voltage signals are processed by the trigger signal circuit 106 to provide ignition reference signals for the ignition controller 104.

In the ignition output circuit, a charging coil L1 cuts magnetic lines, voltage signals are induced, energy is stored on an energy storage capacitor C1 through a first diode D1, an ignition controller controls the conduction of a silicon controlled switch Q1 through a first control output port P1, so that the energy stored on the energy storage capacitor C1 is controlled and released, after a primary coil L2 and a secondary coil L3 are boosted, high voltage is generated at the output end of the secondary coil L3 to ignite, and the gasoline engine is enabled to work and operate.

When the gas inductive switch J1 senses that the harmful gas exceeds the standard, two switch ends of the gas inductive switch J1 are switched on, so that a voltage signal of a first control input end P2 of the ignition controller is reduced, the ignition controller judges that the harmful gas exceeds the standard, and a flameout program is executed.

When the fuel cut-off sensing switch J2 receives the fuel cut-off protection command, two switch ends of the fuel cut-off sensing switch J2 are turned on, so that the voltage signal of the second control input end P3 of the ignition controller is reduced, and the ignition controller starts to execute the fuel cut-off protection program.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.