Automobile ignition control circuit
By using MOS tubes to replace relays in car ignitors and using patch electronic components to connect, traditional mechanical relays have solved the problems of large space, unstable installation and high cost, and have achieved smaller, lighter and more Shock-resistant ignition control circuit.
Patent Information
- Application Number
- CN202421347414.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-06-13
AI Technical Summary
Traditional automotive ignitors use mechanical relays, which have problems such as large space occupation, unstable installation and high cost.
The MOS tube is used instead of the relay as the ignition switch, and the chip-type electronic component connection method is adopted to adapt to vibration occasions and improve the voltage resistance.
It achieves the effect of small circuit size, light weight, good shock resistance, convenient production and low cost.
Smart Images
Figure CN222457620U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an automobile igniter, in particular to an automobile ignition control circuit. Background Art
[0002] Traditional automobile ignition devices use a mechanical structure such as a relay as an ignition switch, which has the following disadvantages: the relay as an ignition device has a certain size and will take up a certain amount of space, and the vibration of the car while driving will cause the relay to be installed unstable and cause poor contact, and the production cost is high. Utility Model Content
[0003] In order to solve the defects of the above-mentioned prior art, the utility model provides an automobile ignition control circuit, which utilizes MOS tubes instead of relays as ignition switches and adopts surface-mount electronic components, so that the entire circuit board is small in size and light in weight, replaces the original mechanical connection, can adapt to vibration occasions, has good pressure resistance, is easy to produce and has low cost.
[0004] To achieve the above technical purpose, the utility model adopts the following technical scheme: an automobile ignition control circuit, comprising a MOS tube Q1, a resistor R2, a diode D1, an optocoupler U1, and a resistor R1, wherein the gate of the MOS tube Q1 is divided into three paths; the first path is connected to the resistor R2, and the resistor R2 and the drain of the MOS tube Q1 are connected to a pulse signal; the second path is connected to the positive electrode of the output end of the optocoupler U1, the negative electrode of the output end of the optocoupler U1 is grounded, the positive electrode of the input end of the optocoupler U1 is connected to a control signal, the negative electrode of the input end of the optocoupler U1 is connected to the resistor R1, and the resistor R1 is grounded; the third path is connected to the diode D1, and the diode D1 is grounded; the source of the MOS tube Q1 is grounded.
[0005] Furthermore, the diode D1 is a voltage stabilizing diode.
[0006] Furthermore, the MOS transistor Q1 is an enhancement type field effect transistor.
[0007] In summary, the utility model has achieved the following technical effects:
[0008] The utility model utilizes a MOS tube instead of a traditional relay as an igniter and adopts an electronic component connection method. It will not have unstable connection or poor contact caused by mechanical connection due to vibration. It is suitable for vibration occasions and has good voltage resistance. It can directly use chip-type electronic components, which is easy to produce and low in cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is provided by the embodiment of the utility model. DETAILED DESCRIPTION
[0010] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0011] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.
[0012] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0013] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0014] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0015] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0016] Example:
[0017] like Figure 1 As shown, an automobile ignition control circuit includes a MOS tube Q1, a resistor R2, a diode D1, an optical coupler U1, and the resistor R1. The gate of the MOS tube Q1 is divided into three paths; the first path is connected to the resistor R2, and the resistor R2 and the drain of the MOS tube Q1 are connected to the pulse signal external input signal as an ignition signal; the second path is connected to the positive electrode of the output end of the optical coupler U1, the negative electrode of the output end of the optical coupler U1 is grounded, the positive electrode of the input end of the optical coupler U1 is connected to the control signal, the negative electrode of the input end of the optical coupler U1 is connected to the resistor R1, and the resistor R1 is grounded; the third path is connected to the diode D1, and the diode D1 is grounded; the source of the MOS tube Q1 is grounded.
[0018] Wherein, the diode D1 is a voltage-stabilizing diode, which keeps the gate voltage within the allowable range.
[0019] MOS tube Q1 is an N-channel enhancement type field effect tube, which is used to control its own on and off to control the start and stop of the generator.
[0020] Resistor R2 is a current limiting resistor to prevent the external pulse signal external input from being too high and damaging Q1.
[0021] Optocoupler U1 is used to isolate the control signal control input.
[0022] Resistor R1 is the current limiting resistor at the input end of the optocoupler U1 to prevent the input end voltage from being too high and damaging U1.
[0023] The resistor R2, the diode D1, the resistor R1 and the optocoupler U1 are all of SMD type, which are low in cost and easy to manufacture.
[0024] In this embodiment, the MOS tube Q1 adopts the model 8050, and the optocoupler U1 adopts the model EL817S(B)(TU)-F / SOP-4.
[0025] Working principle:
[0026] When the control signal control input is at a high level, U1 works, the output transistor of U1 is turned on, the gate of Q1 is at a low level, Q1 is cut off, the external input as the ignition signal is not affected, and works normally, and the generator ignition is enabled.
[0027] When the control signal control input is at a low level, U1 does not work, the output transistor of U1 is cut off, and the external input added to Q1 is limited by R2, directly driving the gate of Q1, so that the gate of Q1 is at a high level, Q1 is turned on, the external input signal is pulled low, and the generator ignition is shut down.
[0028] The utility model utilizes a MOS tube instead of a traditional relay as an igniter and adopts an electronic component connection method. It will not have unstable connection or poor contact caused by mechanical connection due to vibration. It is suitable for vibration occasions and has good voltage resistance. It can directly use chip-type electronic components, which is easy to produce and low in cost.
[0029] The above description is only a preferred implementation mode of the present invention, and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.
Claims
1. An automobile ignition control circuit, characterized in that: It includes a MOS tube Q1, a resistor R2, a diode D1, an optocoupler U1, and a resistor R1. The gate of the MOS tube Q1 is divided into three paths; the first path is connected to the resistor R2, and the resistor R2 and the drain of the MOS tube Q1 are connected to the pulse signal; the second path is connected to the positive electrode of the output end of the optocoupler U1, the negative electrode of the output end of the optocoupler U1 is grounded, the positive electrode of the input end of the optocoupler U1 is connected to the control signal, the negative electrode of the input end of the optocoupler U1 is connected to the resistor R1, and the resistor R1 is grounded; the third path is connected to the diode D1, and the diode D1 is grounded; the source of the MOS tube Q1 is grounded.
2. An automobile ignition control circuit according to claim 1, characterized in that: The diode D1 is a voltage stabilizing diode.
3. The automobile ignition control circuit according to claim 1, characterized in that: The MOS tube Q1 is an enhancement type field effect tube.