Motorcycle engine control system

Abstract

The utility model discloses a motorcycle engine control system, include: power module, hall power module, starting generator, logic conversion module, microcontrol unit, signal processing module and fuel injection control unit, power module electricity is connected hall power module, logic conversion module and microcontrol unit, and starting generator is provided with hall sensor, and power module can be hall power module, logic conversion module and microcontrol unit power supply, and signal processing module can be with first crank position signal processing as second crank position signal after input fuel injection control unit, and second crank position signal is the reverse waveform of first crank position signal. The utility model can detect crank position.

Description

Technical Field

[0001] This utility model relates to engine control systems, and more particularly to a motorcycle engine control system. Background Technology

[0002] With increasing environmental awareness, motorcycles typically use electronic fuel injection engines. When an electronic fuel injection engine is running, it needs to know the angle of the crankshaft to determine the accurate timing of fuel injection and ignition, thereby controlling the engine's efficient operation. Currently, crankshaft position sensors are commonly used to detect the crankshaft position. Crankshaft position sensors usually use photoelectric principles to detect the crankshaft position. However, during use, crankshaft position sensors are easily contaminated by dust or debris, causing them to malfunction and leading to a decrease in the reliability of the motorcycle engine. Utility Model Content

[0003] To overcome the above-mentioned defects, this utility model provides a motorcycle engine control system that has the advantage of being able to detect the crankshaft position.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a motorcycle engine control system, including: a power supply module, a Hall power supply module, a starter generator, a logic conversion module, a microcontroller unit, a signal processing module, and a fuel injection control unit. The power supply module is electrically connected to the Hall power supply module, the logic conversion module, and the microcontroller unit. The starter generator is equipped with a Hall sensor, which is electrically connected to the logic conversion module and the microcontroller unit. The logic conversion module and the microcontroller unit are electrically connected to the signal processing module, and the signal processing module is electrically connected to the fuel injection control unit. The power supply module can supply power to the Hall power supply module, the logic conversion module, and the microcontroller unit. The module can power the Hall sensor, which can acquire the three-phase Hall signal and crankshaft Hall signal to start the generator. The logic conversion module and microcontroller can receive the three-phase Hall signal and crankshaft Hall signal. The logic conversion module can convert the three-phase Hall signal and crankshaft Hall signal into a first crankshaft position signal. The microcontroller can monitor whether the three-phase Hall signal and crankshaft Hall signal are normal. The signal processing module can process the first crankshaft position signal into a second crankshaft position signal and input it into the fuel injection control unit. The second crankshaft position signal is the reverse waveform of the first crankshaft position signal. The fuel injection control unit can adjust the engine's fuel injection timing and ignition timing according to the second crankshaft position signal.

[0005] Optionally, the power module includes a battery, a switch, and a voltage regulator, with the logic conversion module and the microcontroller electrically connected to the battery via the voltage regulator.

[0006] Optionally, the starting generator is a three-phase AC motor.

[0007] Alternatively, the regulator is a low-dropout linear regulator.

[0008] Optionally, the signal processing module internally includes an AND gate G1 and a signal processing circuit. The output of the logic conversion module is electrically connected to the input of the AND gate G1. The microcontroller unit is provided with a crankshaft control pin, which is electrically connected to the input of the AND gate G1. The crankshaft control pin can emit a continuous high-level signal or a continuous low-level signal. The output of the AND gate G1 is electrically connected to the input of the signal processing circuit, and the output of the signal processing circuit is electrically connected to the fuel injection control unit.

[0009] Optionally, the signal processing circuit includes resistors R1, R2, R3, and R4, a switching transistor Q1, and a capacitor to ground C1. The signal output from AND gate G1 passes through resistor R1 and enters the base of switching transistor Q1. The collector of switching transistor Q1 is connected to the power supply through resistor R3, and the emitter of switching transistor Q1 is connected to the fuel injection control unit through resistor R4. Resistor R2 is connected in parallel between the collector and base of switching transistor Q1, and a capacitor to ground C1 is provided between resistor R4 and the fuel injection control unit. Switching transistor Q1 is an NPN type switching transistor.

[0010] Optionally, the logic conversion module and the microcontroller unit operate at a voltage of 5V.

[0011] Alternatively, the battery may be a lead-acid battery.

[0012] The beneficial technical effects of this utility model are as follows: The motorcycle engine control system includes: a power supply module, a Hall power supply module, a starter generator, a logic conversion module, a microcontroller unit, a signal processing module, and a fuel injection control unit. In use, the power supply module supplies power to the Hall power supply module, the logic conversion module, and the microcontroller unit. The Hall power supply module supplies power to the Hall sensors. Engine operation drives the starter generator to rotate. The Hall sensors on the starter generator acquire three-phase Hall signals and crankshaft Hall signals. The three-phase Hall signals include U-phase Hall signals, V-phase Hall signals, and W-phase Hall signals. Then, the three-phase Hall signals and the crankshaft Hall signals are... Within the signal input logic conversion module and microcontroller unit, the logic conversion module converts the three-phase Hall effect signal and the crankshaft Hall effect signal into a first crankshaft position signal. Simultaneously, the microcontroller unit monitors the normality of the three-phase Hall effect signal and the crankshaft Hall effect signal. Then, the first crankshaft position signal is input to the signal processing module, which converts it into a second crankshaft position signal with a waveform opposite to the first crankshaft position signal. This second crankshaft position signal is then input to the fuel injection control unit. The fuel injection control unit adjusts the engine's fuel injection timing and ignition timing based on the second crankshaft position signal, thus achieving the effect of monitoring the crankshaft position without a crankshaft position sensor. This has the advantage of being able to detect the crankshaft position. Attached Figure Description

[0013] Figure 1 This is a circuit block diagram of the entire device of this utility model;

[0014] Figure 2 This is a waveform diagram of the input and output signals of the logic conversion module of this utility model;

[0015] Figure 3 This is a waveform diagram of the input and output signals of the signal processing module of this utility model;

[0016] Figure 4 This is a logic block diagram of the logic conversion module that outputs the CPS12-1 signal of this utility model;

[0017] Figure 5 This is a logic block diagram of the logic conversion module that outputs the CPS18-1 signal of this utility model;

[0018] in:

[0019] 1. Power supply module; 2. Hall effect power supply module; 3. Logic conversion module; 4. Microcontroller unit; 5. Starter generator; 6. Signal processing module; 7. Fuel injection control unit. Detailed Implementation

[0020] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0021] This specific embodiment describes in detail the motorcycle engine control system described in this application, such as... Figures 1-5As shown, the motorcycle engine control system includes: a power module 1, a Hall effect power supply module 2, a starter generator 5, a logic conversion module 3, a microcontroller unit 4, a signal processing module 6, and a fuel injection control unit 7. The power module 1 is electrically connected to the Hall effect power supply module 2, the logic conversion module 3, and the microcontroller unit 4. The starter generator 5 is equipped with a Hall effect sensor, which is electrically connected to the logic conversion module 3 and the microcontroller unit 4. The logic conversion module 3 and the microcontroller unit 4 are electrically connected to the signal processing module 6, and the signal processing module 6 is electrically connected to the fuel injection control unit 7. The power module 1 can supply power to the Hall effect power supply module 2, the logic conversion module 3, and the microcontroller unit 4. The Hall effect power supply module 2 can... Power is supplied to the Hall sensor, which can collect the three-phase Hall signal and crankshaft Hall signal from the generator motor 5. The logic conversion module 3 and the microcontroller unit 4 can receive the three-phase Hall signal and crankshaft Hall signal. The logic conversion module 3 can convert the three-phase Hall signal and crankshaft Hall signal into a first crankshaft position signal. The microcontroller unit 4 can monitor whether the three-phase Hall signal and crankshaft Hall signal are normal. The signal processing module 6 can process the first crankshaft position signal into a second crankshaft position signal and input it into the fuel injection control unit 7. The second crankshaft position signal is the reverse waveform of the first crankshaft position signal. The fuel injection control unit 7 can adjust the engine's fuel injection timing and ignition timing according to the second crankshaft position signal. In operation, power module 1 supplies power to Hall power supply module 2, logic conversion module 3, and microcontroller unit 4. Hall power supply module 2 supplies power to the Hall sensor. Engine operation drives starter generator 5 to rotate. The Hall sensor on starter generator 5 acquires three-phase Hall signals and crankshaft Hall signals, including U-phase, V-phase, and W-phase Hall signals. These signals are then input into logic conversion module 3 and microcontroller unit 4. Logic conversion module 3 converts the three-phase and crankshaft Hall signals into a first crankshaft position signal. Simultaneously, microcontroller unit 4 monitors the normality of the three-phase and crankshaft Hall signals. The first crankshaft position signal is then input into signal processing module 6, which converts it into a second crankshaft position signal with a waveform opposite to the first crankshaft position signal. This second crankshaft position signal is then input into fuel injection control unit 7. Fuel injection control unit 7 adjusts the engine's injection and ignition timings based on the second crankshaft position signal, thus achieving crankshaft position monitoring without the need for a crankshaft position sensor. This provides the advantage of being able to detect crankshaft position.

[0022] In this embodiment, the starter generator 5 is equipped with four Hall sensors. Three of the Hall sensors correspond to the U-phase, V-phase, and W-phase of the starter generator 5, respectively, and the other Hall sensor corresponds to the crankshaft. When the crankshaft rotates to a set position (angle), the Hall sensor corresponding to the crankshaft can be triggered (the crankshaft Hall sensor can only detect the number of rotations or the approximate position of the crankshaft. The accuracy of the crankshaft Hall sensor alone cannot detect the specific position of the crankshaft. It is necessary to add the U-phase Hall signal, V-phase Hall signal, and W-phase Hall signal for logical conversion to accurately measure the position of the crankshaft). All Hall sensors are powered by the Hall power supply module 2, which is powered by the power supply module 1.

[0023] After receiving the U-phase Hall signal, V-phase Hall signal, W-phase Hall signal, and crankshaft Hall signal, the logic conversion module 3 generates a first crankshaft position signal (CPS signal) through logic conversion. In this embodiment, for one revolution of the crankshaft, the logic conversion module can generate an 11-cycle square wave signal (CPS12-1 signal) as the first crankshaft position signal or generate a 17-cycle square wave signal (CPS18-1 signal). That is, the first crankshaft position signal (CPS signal) is either a CPS12-1 signal or a CPS18-1 signal, which the user can choose according to their needs. Figure 4 As shown, the logic devices in the logic conversion module that outputs the CPS12-1 signal include NOT gate G2, NOT gate G3, NOT gate G4, AND gate G5, AND gate G6, XOR NOT gate G7, OR gate G8, and AND gate G9. The specific circuit is as follows: the U-phase Hall signal enters AND gate G6, XOR NOT gate G7, and then enters AND gate G5 after passing through NOT gate G2; the V-phase Hall signal enters AND gate G5, and then enters AND gate G6 after passing through NOT gate G3; the W-phase Hall signal enters AND gate G5, and then enters AND gate G6 after passing through NOT gate G4; the crankshaft Hall signal enters XOR NOT gate G7; the signals output from AND gate G5 and AND gate G6 enter OR gate G8; the signals output from OR gate G8 and XOR NOT gate G7 enter AND gate G9; and the analog CPS12-1 signal output from AND gate G9 enters AND gate G1.

[0024] like Figure 5 As shown, the logic devices of the logic conversion module that outputs the CPS18-1 signal include NOT gate G10, AND gate G11, AND gate G12, AND gate G13, and OR gate G14. Specifically, the U-phase Hall signal enters AND gates G11 and G12, the V-phase Hall signal enters AND gates G11 and G13, the W-phase Hall signal enters AND gates G12 and G13, the crankshaft Hall signal enters AND gate G13 through NOT gate G10, and the signals output from AND gates G11, G12, and G13 enter OR gate G14. OR gate G14 outputs a simulated CPS18-1 signal, which then enters AND gate G1. The logic devices used in this embodiment are all existing technologies and will not be described in detail here.

[0025] Optionally in this embodiment, the power module 1 includes a battery, a switch, and a voltage regulator. The logic conversion module 3 and the microcontroller unit 4 are electrically connected to the battery through the voltage regulator. The voltage regulator is used to stabilize the voltage.

[0026] Optionally, in this embodiment, the generator motor 5 is a three-phase AC motor.

[0027] Optionally, in this embodiment, the voltage regulator is a low-dropout linear regulator (LDO).

[0028] Optionally in this embodiment, the signal processing module 6 is internally provided with an AND gate G1 and a signal processing circuit. The output terminal of the logic conversion module 3 is electrically connected to the input terminal of the AND gate G1. The microcontroller unit 4 is provided with a crankshaft control pin, which is electrically connected to the input terminal of the AND gate G1. The crankshaft control pin can emit a continuous high-level signal or a continuous low-level signal. The output terminal of the AND gate G1 is electrically connected to the input terminal of the signal processing circuit, and the output terminal of the signal processing circuit is electrically connected to the fuel injection control unit 7.

[0029] Optionally in this embodiment, the signal processing circuit includes resistors R1, R2, R3, and R4, a switching transistor Q1, and a capacitor to ground C1. The signal output from AND gate G1 passes through resistor R1 and enters the base of switching transistor Q1. The collector of switching transistor Q1 is connected to the power supply through resistor R3, and the emitter of switching transistor Q1 is connected to the fuel injection control unit 7 through resistor R4. Resistor R2 is connected in parallel between the collector and base of switching transistor Q1, and a capacitor to ground C1 is provided between resistor R4 and the fuel injection control unit 7. Switching transistor Q1 is an NPN type switching transistor. Figure 1 As shown, when the first crankshaft position signal (CPS signal) outputs a high level, switch Q1 is turned on, and the second crankshaft position signal (CPS1 signal) outputs a low level. When the first crankshaft position signal (CPS signal) outputs a low level, switch Q1 is turned off, and the second crankshaft position signal (CPS1 signal) is pulled up from 5V to a high level. That is, when the input signal of the signal processing module is low, the output signal is high, and when the input signal is high, the output signal is low, making the second crankshaft position signal (CPS1 signal) an inverse waveform of the first crankshaft position signal (CPS signal). The AND gate G1 stops the system when an abnormal Hall sensor signal is detected. In this embodiment, the second crankshaft position signal includes CPS1 12-1 and CPS1 18-1. In some optional embodiments, switch Q1 can also be replaced with an NMOS transistor.

[0030] Optionally, in this embodiment, the logic conversion module 3 and the microcontroller unit 4 operate at a voltage of 5V.

[0031] Optionally, in this embodiment, the battery is a lead-acid battery.

[0032] In this embodiment, the function of stopping the system when an abnormality of the Hall sensor is detected is implemented as follows: When the Hall sensor signal is output normally, the crankshaft control signal (CPS Ctrl) output by the control port of the microcontroller is at a high level. When the first crankshaft position signal (CPS signal) and the crankshaft control signal (CPS Ctrl) enter AND gate G1, AND gate G1 outputs a signal that is the same as the first crankshaft position signal (CPS signal) (because the AND gate has the characteristic that the output signal is high only when all input signals are high, otherwise the output signal is low). Then the signal processing module processes the signal, and finally the second crankshaft position signal (CPS1 signal) is output as a high / low level square wave signal. When the Hall signal is abnormal (such as the absence of a certain Hall signal), the control port of the microcontroller detects this and outputs a low level crankshaft control signal (CPSCtrl). The first crankshaft position signal (CPS signal) and the low level crankshaft control signal (CPS1) are then output as a high / low level square wave signal. After entering AND gate G1 with Ctrl), AND gate G1 outputs a continuous low-level signal. After being processed by the signal processing module, it outputs a continuous high-level signal. When the fuel injection control unit receives the continuous high-level signal, it stops the engine from injecting fuel and igniting.

[0033] The motorcycle engine control system described in this embodiment has the advantage of being able to detect the crankshaft position.

Claims

1. A motorcycle engine control system, characterized in that, include: The system comprises a power supply module (1), a Hall effect power supply module (2), a starter generator (5), a logic conversion module (3), a microcontroller unit (4), a signal processing module (6), and a fuel injection control unit (7). The power supply module (1) is electrically connected to the Hall effect power supply module (2), the logic conversion module (3), and the microcontroller unit (4). The starter generator (5) is equipped with a Hall effect sensor, which is electrically connected to the logic conversion module (3) and the microcontroller unit (4). The logic conversion module (3) and the microcontroller unit (4) are electrically connected to the signal processing module (6), and the signal processing module (6) is electrically connected to the fuel injection control unit (7). The power supply module (1) can supply power to the Hall effect power supply module (2), the logic conversion module (3), and the microcontroller unit (4). The source module (2) can power the Hall sensor, which can collect the three-phase Hall signal and crankshaft Hall signal of the generator motor (5). The logic conversion module (3) and the microcontroller (4) can receive the three-phase Hall signal and crankshaft Hall signal. The logic conversion module (3) can convert the three-phase Hall signal and crankshaft Hall signal into the first crankshaft position signal. The microcontroller (4) can monitor whether the three-phase Hall signal and crankshaft Hall signal are normal. The signal processing module (6) can process the first crankshaft position signal into the second crankshaft position signal and input it into the fuel injection control unit (7). The second crankshaft position signal is the reverse waveform of the first crankshaft position signal. The fuel injection control unit (7) can adjust the fuel injection timing and ignition timing of the engine according to the second crankshaft position signal.

2. The motorcycle engine control system according to claim 1, characterized in that: The power module (1) includes a battery, a switch and a voltage regulator. The logic conversion module (3) and the microcontroller (4) are electrically connected to the battery through the voltage regulator.

3. The motorcycle engine control system according to claim 1, characterized in that: The starting generator (5) is a three-phase AC motor.

4. The motorcycle engine control system according to claim 2, characterized in that: The voltage regulator is a low-dropout linear voltage regulator.

5. The motorcycle engine control system according to claim 1, characterized in that: The signal processing module (6) is equipped with an AND gate G1 and a signal processing circuit. The output of the logic conversion module (3) is electrically connected to the input of the AND gate G1. The microcontroller unit (4) is equipped with a crankshaft control pin, which is electrically connected to the input of the AND gate G1. The crankshaft control pin can emit a continuous high-level signal or a continuous low-level signal. The output of the AND gate G1 is electrically connected to the input of the signal processing circuit. The output of the signal processing circuit is electrically connected to the fuel injection control unit (7).

6. The motorcycle engine control system according to claim 5, characterized in that: The signal processing circuit includes resistors R1, R2, R3, and R4, a switching transistor Q1, and a capacitor to ground C1. The signal output by AND gate G1 enters the base of the switching transistor Q1 after passing through resistor R1. The collector of the switching transistor Q1 is connected to the power supply through resistor R3, and the emitter of the switching transistor Q1 is connected to the fuel injection control unit (7) through resistor R4. A resistor R2 is connected in parallel between the collector and base of the switching transistor Q1, and a capacitor to ground C1 is provided between resistor R4 and the fuel injection control unit (7). The switching transistor Q1 is an NPN type switching transistor.

7. The motorcycle engine control system according to claim 1, characterized in that: The logic conversion module (3) and the microcontroller unit (4) operate at a voltage of 5V.

8. The motorcycle engine control system according to claim 2, characterized in that: The battery is a lead-acid battery.

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