Engine ignition controller

Abstract

The utility model relates to the field of internal combustion engine ignition devices, in particular to an engine ignition controller. The engine ignition controller comprises an ECU, a camshaft position sensor, a crankshaft position sensor and a rotating speed sensor. The camshaft position sensor, the crankshaft position sensor and the rotating speed sensor are all connected with the ECU. According to the engine ignition controller, by additionally arranging the rotating speed sensor and combining the design of the signal transmission circuit, the electrostatic discharger and the like, the ignition precision of an engine under various complex working conditions is improved, and the fuel economy and performance of the engine are optimized.

Description

Technical Field

[0001] The present application relates to the field of internal combustion engine ignition devices, and in particular to an engine ignition controller. Background Art

[0002] The ignition controller, ignition coil and spark plug together form the ignition system, which is a professional device for achieving accurate ignition of the internal combustion engine. The ignition controller is controlled by the engine control unit (ECU) and includes a camshaft position sensor and a crankshaft position sensor.

[0003] The camshaft position sensor is used to detect the position and rotation angle of the camshaft to determine the compression top dead center position of the cylinder. It provides signals to the engine control unit (ECU) for precise adjustment of ignition control and fuel injection timing. In addition, it helps the ECU identify the order of cylinders to ensure smooth operation of the engine.

[0004] The crankshaft position sensor monitors the rotational position of the crankshaft and provides information on engine speed and crankshaft position. It is essential to determine the timing of ignition and injection, ensuring that the engine's ignition and fuel injection are precisely synchronized with the piston position, thereby optimizing engine performance and fuel efficiency. Therefore, the camshaft position sensor and crankshaft position sensor can ensure accurate control of the engine.

[0005] Although the camshaft position sensor and crankshaft position sensor can achieve high-precision ignition control, under some complex working conditions, the crankshaft position sensor and camshaft position sensor may be affected by the environment and may have abnormal conditions, such as signal transmission distortion or signal delay. Although such abnormal conditions will not cause damage to the engine operation, they will affect the engine's ignition accuracy. In this case, the precise control of the engine will be affected, thereby affecting the engine's fuel economy and performance. Utility Model Content

[0006] In order to solve the problem of stable control of the engine under complex working conditions, the present application provides an engine ignition controller that can effectively reduce the unstable operation of the engine caused by the influence of complex environments.

[0007] The engine ignition controller provided in this application adopts the following technical solutions:

[0008] An engine ignition controller comprises an ECU, a camshaft position sensor, a crankshaft position sensor and a rotation speed sensor, wherein the camshaft position sensor, the crankshaft position sensor and the rotation speed sensor are all connected to the ECU; the rotation speed sensor is used to detect the rotation speed of the camshaft.

[0009] By adopting the above technical solution, in the current technology, the crankshaft position sensor can detect the rotational speed of the crankshaft. Therefore, by adding a rotational speed sensor, the rotational speed data of the camshaft can be directly obtained. By calculating the rotational speed ratio of the crankshaft and the camshaft and cooperating with the camshaft position sensor, the matching degree of the operation of the crankshaft and the camshaft can be judged, providing more data references for the ECU, thereby improving the stability and accuracy of ignition under various working conditions.

[0010] Preferably, it further comprises an induction wheel, which is coaxially fixedly connected to the camshaft, and is provided with a plurality of induction teeth. The rotation speed sensor cooperates with the induction teeth to realize the rotation speed detection.

[0011] By adopting the above technical solution and utilizing the cooperation between the induction tooth and the speed sensor, the speed of the induction wheel can be conveniently and accurately detected, thereby obtaining the speed of the camshaft.

[0012] Preferably, the induction tooth is detachably connected to the induction wheel.

[0013] By adopting the above technical solution and a detachable connection method, it is convenient to replace or repair the induction teeth at a later time.

[0014] Preferably, the system further comprises a signal transmission circuit arranged between the rotation speed sensor and the ECU to realize signal transmission between the rotation speed sensor and the ECU, wherein the signal transmission circuit is connected to an electrostatic discharger.

[0015] By adopting the above technical solution and setting up an electrostatic discharger, static electricity generated during signal transmission and engine operation can be effectively discharged, thereby avoiding interference of static electricity on the signal and ensuring the stability of signal transmission.

[0016] Preferably, the signal transmission circuit further includes a signal conditioning module, the signal conditioning module is electrically connected to the output end of the rotation speed sensor, and the electrostatic discharger is arranged between the signal conditioning module and the rotation speed sensor and is electrically connected to the signal conditioning module.

[0017] By adopting the above technical solution and setting a signal conditioning module, the signal output by the speed sensor can be conditioned to make the signal more stable, thereby further improving the stability of signal transmission.

[0018] Preferably, the signal conditioning module includes a filtering and shaping unit and a signal amplifying unit which are arranged in sequence.

[0019] By adopting the above technical solution, the signal is filtered and shaped by the filtering and shaping unit, and then amplified by the signal amplification unit, so that the quality of the signal can be guaranteed and the ECU can receive the signal more accurately.

[0020] Preferably, an electrostatic discharger is also provided between the signal conditioning module and the ECU.

[0021] By adopting the above technical solution and adding an electrostatic discharger between the signal conditioning module and the ECU, the stability of signal transmission can be further ensured, and problems such as signal distortion caused by electrostatic interference can be avoided.

[0022] Preferably, an isolated power supply is further included, which is arranged between the battery and the ignition coil and electrically connected to the ECU. The battery and the ignition coil are connected through the isolated power supply to achieve electrical isolation between the battery and the ignition coil.

[0023] By adopting the above technical solution and providing an isolated power supply, electrical isolation between the battery and the ignition coil can be achieved, thus avoiding damage to the battery caused by the high voltage generated by the ignition coil and improving the safety of the system.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. By setting up a speed sensor and installing a corresponding induction wheel on the camshaft that matches the speed sensor, the speed data of the camshaft can be directly obtained, providing more data reference for the ECU, thereby improving the stability and accuracy of ignition under various working conditions;

[0026] 2. The induction wheel is provided with detachable induction teeth, which is convenient for later replacement or maintenance of the induction teeth;

[0027] 3. By setting up an electrostatic discharger and a signal conditioning module, the stability of signal transmission can be ensured, avoiding problems such as signal distortion caused by electrostatic interference;

[0028] 4. By setting up an isolated power supply, the battery and ignition coil can be electrically isolated, improving the safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the circuit principle of the engine ignition controller in the embodiment of the present application;

[0030] Figure 2 It is a schematic diagram of the structure of the induction wheel in the embodiment of the present application.

[0031] Markings in the attached figure: 1. ECU; 2. camshaft position sensor; 3. crankshaft position sensor; 4. speed sensor; 5. induction wheel; 51. induction tooth; 6. signal transmission circuit; 61. filtering and shaping unit; 62. signal amplifying unit; 7. electrostatic discharger; 8. isolation power supply. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-2This application is described in further detail.

[0033] Example 1

[0034] The engine ignition controller provided in the embodiment of the present application refers to Figure 1 and Figure 2 The engine ignition controller includes an ECU 1, a camshaft position sensor 2, a crankshaft position sensor 3 and a speed sensor 4. The camshaft position sensor 2, the crankshaft position sensor 3 and the speed sensor 4 are all connected to the ECU 1. The speed sensor 4 can be a magnetoelectric speed sensor 4, and its main function is to detect the speed of the camshaft.

[0035] Specifically, the engine ignition controller further includes an induction wheel 5 coaxially fixedly connected to the camshaft. The induction wheel 5 is provided with a plurality of induction teeth 51, which cooperate with the speed sensor 4. When the induction teeth 51 pass through the speed sensor 4, the sensor can capture these changes, thereby realizing the detection of the camshaft speed. This design makes the detection of the speed more direct and accurate.

[0036] In order to further optimize the structure and usability of the induction wheel 5, in this embodiment, the induction teeth 51 are designed to be detachably connected to the induction wheel 5. This connection method is not only convenient for replacing and repairing the induction teeth 51, but also can adjust the number and arrangement of the induction teeth 51 according to actual needs, thereby meeting different detection requirements.

[0037] The implementation principle of the embodiment of the present application is: since in the current technology, the crankshaft position sensor 3 can detect the rotational speed of the crankshaft, by adding a rotational speed sensor 4, the rotational speed data of the camshaft can be directly obtained, and the rotational speed ratio of the crankshaft and the camshaft can be calculated, in conjunction with the camshaft position sensor 2, the matching degree of the crankshaft and the camshaft operation can be judged, providing ECU1 with more data references, thereby improving the stability and accuracy of ignition under various working conditions.

[0038] For example, for an ordinary four-cylinder gasoline engine, a timing wheel is installed on the crankshaft, a flywheel is installed on the camshaft, and the flywheel and the timing wheel are generally connected by a chain or belt drive to form the timing system of the engine. In general, the speed ratio of the flywheel and the timing wheel is 2:1, so the speed sensor 4 can directly obtain the speed of the flywheel, and the speed of the crankshaft can be obtained by the crankshaft sensor to determine whether the speeds of the crankshaft and the camshaft match, thereby determining the operating state of the engine.

[0039] Example 2

[0040] The engine ignition controller provided in the embodiment of the present application, on the basis of embodiment 1, further includes a signal transmission circuit 6 arranged between the speed sensor 4 and the ECU 1. The main function of the signal transmission circuit 6 is to achieve stable and accurate transmission of the signal between the speed sensor 4 and the ECU 1. In order to improve the anti-interference ability of signal transmission, the signal transmission circuit 6 is also connected to an electrostatic discharger 7, which can effectively remove the interference caused by static electricity to the signal.

[0041] Furthermore, the signal transmission circuit 6 also includes a signal conditioning module. The signal conditioning module is electrically connected to the output end of the speed sensor 4, and its main function is to pre-process the original signal output by the speed sensor 4, such as filtering, shaping and amplifying, so as to improve the quality and accuracy of the signal. The electrostatic discharger 7 is arranged between the signal conditioning module and the speed sensor 4, and is electrically connected to the signal conditioning module to ensure that electrostatic interference can be effectively removed during the signal conditioning process.

[0042] Specifically, the signal conditioning module includes a filter shaping unit 61 and a signal amplification unit 62 which are arranged in sequence. The filter shaping unit 61 is mainly responsible for filtering and shaping the original signal to remove noise and interference components therein and make the signal waveform more regular. The signal amplification unit 62 is responsible for amplifying the processed signal to increase the amplitude and driving capability of the signal to meet the requirements of the subsequent circuit for the signal.

[0043] In order to more comprehensively protect the stability and reliability of signal transmission, an electrostatic discharger 7 is also provided between the signal conditioning module and the ECU 1, and the electrostatic discharger 7 is connected to the output end of the signal conditioning module. In this way, no matter at which link of signal transmission, electrostatic interference can be effectively removed to ensure that the signal can be stably and accurately transmitted to the ECU 1.

[0044] Example 3

[0045] The engine ignition controller provided in the embodiment of the present application, on the basis of embodiment 2, further includes an isolated power supply 8. The isolated power supply 8 is arranged between the battery and the ignition coil and is electrically connected to the ECU1. Its main function is to realize the electrical isolation between the battery and the ignition coil. The isolated power supply 8 is controlled by the ECU1. Through this isolation design, current interference or damage caused by electrical faults or abnormal conditions can be prevented, thereby improving the overall safety and stability of the ignition system.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An engine ignition controller, characterized in that: The invention comprises an ECU (1), a camshaft position sensor (2), a crankshaft position sensor (3) and a rotation speed sensor (4), wherein the camshaft position sensor (2), the crankshaft position sensor (3) and the rotation speed sensor (4) are all connected to the ECU (1); the rotation speed sensor (4) is used to detect the rotation speed of the camshaft; It also comprises an induction wheel (5), the induction wheel (5) being coaxially fixedly connected to the camshaft, the induction wheel (5) being provided with a plurality of induction teeth (51), and the rotation speed sensor (4) cooperating with the induction teeth (51) to achieve rotation speed detection.

2. The engine ignition controller according to claim 1, characterized in that: The induction tooth (51) is detachably connected to the induction wheel (5).

3. The engine ignition controller according to claim 1, characterized in that: It also includes a signal transmission circuit (6) arranged between the rotation speed sensor (4) and the ECU (1) to achieve signal transmission between the rotation speed sensor (4) and the ECU (1), and an electrostatic discharger (7) is connected to the signal transmission circuit (6).

4. The engine ignition controller according to claim 3, characterized in that: The signal transmission circuit (6) further comprises a signal conditioning module, the signal conditioning module being electrically connected to the output end of the rotation speed sensor (4), and the electrostatic discharger (7) being arranged between the signal conditioning module and the rotation speed sensor (4) and being electrically connected to the signal conditioning module.

5. The engine ignition controller according to claim 4, characterized in that: The signal conditioning module comprises a filtering and shaping unit (61) and a signal amplification unit (62) which are arranged in sequence.

6. The engine ignition controller according to claim 4, characterized in that: An electrostatic discharger (7) is also provided between the signal conditioning module and the ECU (1).

7. The engine ignition controller according to claim 6, characterized in that: It also includes an isolated power supply (8) which is arranged between the battery and the ignition coil and is electrically connected to the ECU (1). The battery and the ignition coil are connected via the isolated power supply (8) to achieve electrical isolation between the battery and the ignition coil.

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