Ignition system for vehicle and vehicle
By introducing controller, primary circuit and secondary circuit design into the vehicle ignition system, the magnet coupling and sampling lines are used to achieve real-time diagnosis of the ignition device, which solves the problem of lack of diagnostic functions in the traditional ignition system, and achieves the effects of fault detection and spark plug wear prediction.
Patent Information
- Application Number
- CN202311863919.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-07-01
AI Technical Summary
Traditional vehicle ignition systems lack diagnostic functions and cannot detect ignition device failure in real time, resulting in engine shutdown, power loss and damage to the exhaust gas treatment system.
An ignition system including a controller, a primary circuit and a secondary circuit is designed, and real-time diagnosis and abnormal detection of the ignition device are realized through the secondary circuit coil and sampling circuit coupled to the magnet. The controller can send a notification signal to the vehicle self-diagnosis system and diagnose spark plug wear by collecting current signals.
Real-time fault detection and diagnosis of the vehicle ignition system is realized, and the driver and the vehicle self-diagnosis system are notified in a timely manner, which avoids the risk of engine stalling and exhaust gas treatment system damage, and provides prediction and replacement prompts for the service life of the spark plug.
Smart Images
Figure CN120231677A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle ignition systems. More specifically, this application relates to a vehicle ignition system with a diagnostic function and a vehicle equipped with such a system. Background Art
[0002] The ignition system is very important for vehicles that use fuel as engine power. Faults in the ignition system often lead to engine stalling, loss of engine power, and even damage to the exhaust gas treatment system. Traditional ignition systems usually do not have a diagnostic function, and faults in the wiring, ignition coils, igniters, and rubber sleeves cannot be detected by the on-board diagnostic system (OBD). The wear and replacement of the igniter are usually determined based on usage time and experience. Summary of the Invention
[0003] The purpose of this application is to solve or at least alleviate the problems existing in the prior art.
[0004] On the one hand, a vehicle ignition system is provided, which includes: A controller; A plurality of ignition devices connected to the controller, each ignition device including: A primary circuit, the primary circuit including: a power source, an ignition switch connected to the controller to receive an ignition control signal from the controller, and a primary circuit coil; and A secondary circuit and a sampling line connected from the secondary circuit to the controller, the secondary circuit including: a secondary circuit coil coupled to the primary circuit coil through a magnetic conductor, an igniter, and a sampling resistor.
[0005] Optionally, in the embodiment of the ignition system, the controller is configured to sequentially send ignition control signals to the plurality of ignition devices in a certain order, and is configured to perform ignition anomaly diagnosis on the corresponding ignition device based on the current signal collected through the sampling line.
[0006] Optionally, in the embodiment of the ignition system, the controller sends a notification signal to the on-board diagnostic system when an ignition system anomaly is diagnosed.
[0007] Optionally, in the embodiment of the ignition system, the sampling resistor is arranged downstream of the igniter.
[0008] Optionally, in the embodiment of the ignition system, the sampling line is connected to the controller from a position between the sampling resistor and the igniter of the secondary circuit.
[0009] Optionally, in the embodiment of the ignition system, the sampling lines of the plurality of ignition devices are connected in parallel to the same port of the controller.
[0010] Optionally, in the embodiments of the ignition system described above, an isolation diode is provided on the sampling line.
[0011] Optionally, in the embodiments of the ignition system described above, the controller collects the peak current and / or current duration in the secondary circuit through the sampling line, and the controller is further configured to perform wear diagnosis on the spark plugs of the corresponding ignition device based on the peak current and / or current duration.
[0012] Optionally, in the embodiments of the ignition system described above, the primary circuit and the secondary circuit are connected to the same ground terminal.
[0013] According to another aspect, a vehicle is also provided, which includes the ignition system according to the various embodiments.
[0014] Optionally, the vehicle includes 3 to 8 cylinders, and each cylinder is configured with one of the ignition devices.
[0015] The ignition system according to the embodiments of the present application can detect ignition device failures in real time. Description of the Drawings
[0016] Referring to the accompanying drawings, the disclosure of the present application will become more understandable. It is easily understood by those skilled in the art that these drawings are only for illustrative purposes and are not intended to limit the protection scope of the present application. In addition, similar numbers in the figures are used to represent similar components, where: Figure 1 shows a schematic structural diagram of an ignition system according to an embodiment of the present application; Figure 2 shows a schematic diagram of an ignition circuit according to an embodiment of the present application; and Figure 3 shows a flowchart of the diagnostic process of the ignition system according to an embodiment of the present application. Detailed Embodiments
[0017] Refer to Figure 1 , which shows an ignition system for a vehicle according to an embodiment of the present application. The ignition system according to the embodiment includes: a controller 3, such as an electronic control unit ECU, and a plurality of ignition devices connected to the controller 3 ( Figure 1Only one of them is shown exemplarily). Each ignition device includes: a primary circuit 1 and a secondary circuit 2. The primary circuit 1 and the secondary circuit 2 respectively include a primary circuit coil 12 and a secondary circuit coil 22. The primary circuit coil 12 and the secondary circuit coil 22 are coupled through a magnetic conductor 4, and the magnetic conductor 4 is, for example, an iron core. The primary circuit 1 is connected to a power source 91, such as a 24V power source, and an ignition switch 13 connected to a controller 3 to receive an ignition control signal 31 from the controller 3. The secondary circuit includes an igniter 21, and the igniter 21 includes, for example, a spark plug and a rubber sleeve. The controller 3 sends the ignition control signal 31 to the ignition devices corresponding to the respective cylinders in a predetermined order. The ignition control signal 31 is, for example, a pulse signal. The primary circuit 1 is turned on in response to the ignition control signal 31, and a magnetic field is generated in the primary circuit coil 12. This magnetic field is transmitted to the secondary circuit 2 through the magnetic conductor 4, and a voltage is generated in the secondary circuit 2. This voltage causes the igniter 21 to ignite the combustible gas in the cylinder. In addition, according to an embodiment of the present application, the secondary circuit 2 further includes a sampling resistor 23, and a sampling line 32 is connected from the secondary circuit 2 to the controller 3. Through the sampling resistor 23, the spark current will be converted into a voltage across the resistor 23, and the corresponding current can be fed back to the controller 3 through the sampling line 32, thereby monitoring whether the ignition is normal.
[0018] Continuing to refer to Figure 2 , which shows a specific embodiment of a circuit that can be used to implement Figure 1 the concept of. It should be noted that Figure 2 the specific embodiment of the circuit shown in is only exemplary. Those skilled in the art can make various modifications to the specific circuit to achieve the same or equivalent functions, and these equivalent replacements in the circuit aspect should be included within the scope of the present application. In some embodiments, based on the direction of the ignition current, the sampling resistor is arranged downstream of the igniter 21. In some embodiments, the sampling line 32 is connected from a position between the sampling resistor 23 and the igniter 21 of the secondary circuit to the controller 3, specifically, the diagnostic port 320 of the controller. In some embodiments, the sampling lines 32 of multiple ignition devices are connected in parallel to the same port 320 of the controller 3. In addition, the controller 3 further includes a power supply port 110, a ground port 111, and an ignition signal output port 310. The power supply port 110 outputs, for example, a 24V voltage, which is connected to one end of the primary circuit 1. The ground port 111 is connected to the other end of the primary circuit 1. The ignition signal output port 310 is connected to the ignition switch 13. The secondary circuit includes an isolated high voltage 25, an igniter 21, and a sampling resistor 23. The secondary circuit 2 can also be connected to the same ground port 111, and an isolation diode 241 is arranged in the secondary circuit 2. In addition, an isolation diode 242 is arranged on the sampling line 32. The isolation diodes 241 and 242 can avoid the mutual influence between the primary circuit 1 and the secondary circuit 2, and at the same time avoid problems such as short-circuit burning out of the ignition device caused by incorrect connection.
[0019] As Figure 3 shown, in some embodiments, taking a 6-cylinder vehicle as an example, the ignition devices 51, 52, 53, 54, 55, 56 of each cylinder are connected to the same port of the controller 3. In some embodiments, the controller 3 is configured to sequentially send ignition control signals to a plurality of ignition devices in a certain order, and is configured to perform ignition abnormality diagnosis on the corresponding ignition device based on the current signal collected through the sampling line 32. For example, after sending an ignition control signal to the first ignition device 51 in Figure 3 , the current signal fed back by the first ignition device 51 through the sampling line 32 should be received. If there is no corresponding current signal, it indicates that there is a problem in the primary circuit or the secondary circuit of the first ignition device. The controller sends a notification signal to the on-vehicle self-diagnosis system when diagnosing an abnormality in the ignition system. In some embodiments, the controller 3 collects the current peak value a and / or the current duration t in the secondary circuit 2 through the sampling line 32. The controller 3 is also configured to perform wear diagnosis on the igniter of the corresponding ignition device based on the current peak value a and / or the current duration t, especially to predict the service life of the spark plug, and give a prompt to replace the spark plug based on the prediction. More specifically, in Figure 3 the flow shown, in step S1, the controller receives the sampled current signal; in step S2, it determines the cylinder identity corresponding to the current signal based on the sent ignition control signal i; then in step S31, it performs ignition abnormality diagnosis, in S32, it performs wear diagnosis, and when any abnormality is diagnosed in S31 or S32, the controller sends the abnormality to the on-vehicle self-diagnosis system in step S4 to prompt the user.
[0020] According to an embodiment of the present application, a vehicle is further provided, which includes the ignition system according to the various embodiments of the present application. The vehicle may include, for example, 3 to 8 cylinders, and each cylinder is configured with an ignition device. The vehicle may use gasoline or diesel as fuel, or use new fuels such as natural gas, hydrogen, or methanol, etc.
[0021] The specific embodiments described above of the present application are only for more clearly describing the principle of the present application, in which each component is clearly shown or described to make the principle of the present application easier to understand. Without departing from the scope of the present application, those skilled in the art can easily make various modifications or changes to the present application. Therefore, it should be understood that these modifications or changes should be included within the patent protection scope of the present application.
Claims
1. An ignition system for a vehicle, comprising: a controller (3); a plurality of ignition devices connected to the controller (3), each ignition device comprising: a primary circuit (1), the primary circuit (1) comprising: an ignition switch (13) connected to the controller (3) to receive an ignition control signal (31) from the controller and a primary circuit coil (12), the primary circuit (1) being connected to a power source (91); characterized in that it further comprises a secondary circuit (2), the secondary circuit (2) comprising: a secondary circuit coil (22) coupled to the primary circuit coil (12) through a magnetic conductor (4), an igniter (21), a sampling resistor (23) and a sampling line (32) connecting from the secondary circuit (2) to the controller (3).
2. The ignition system according to claim 1, characterized in that, The controller (3) is configured to sequentially send ignition control signals to the plurality of ignition devices in a certain order, and is configured to perform ignition abnormality diagnosis on the corresponding ignition device based on the current signal collected through the sampling line (32).
3. The ignition system according to claim 2, characterized in that, The controller sends a notification signal to the on-vehicle self-diagnosis system when an ignition system abnormality is diagnosed.
4. The ignition system according to claim 1, characterized in that, The sampling resistor (23) is provided downstream of the igniter (21).
5. The ignition system according to claim 4, wherein, The sampling line is connected to the controller (3) from a position between the sampling resistor (23) and the igniter (21) of the secondary circuit (2).
6. The ignition system according to any one of claims 1-5, characterized in that, The sampling lines (32) of the plurality of ignition devices are connected in parallel to the same port (320) of the controller.
7. The ignition system according to any one of claims 1-5, characterized in that, An isolation diode (242) is provided on the sampling line (32).
8. The ignition system according to any one of claims 1-5, characterized in that, The controller (3) collects the current peak value and / or current duration in the secondary circuit (2) through the sampling line (32), and the controller (3) is further configured to perform wear diagnosis on the spark plug of the corresponding ignition device based on the current peak value and / or current duration.
9. A vehicle, characterized in that, The vehicle comprises the ignition system according to any one of claims 1-8.
10. The vehicle according to claim 9, characterized in that, The vehicle comprises 3 to 8 cylinders, and each cylinder is configured with one of the ignition devices.