A dual-output electronic clutch pedal

Abstract

The dual-output electronic clutch pedal includes a pedal assembly, a shaft assembly, and an angular displacement sensor. One end of the shaft assembly is connected to the pedal assembly, and the other end is connected to the angular displacement sensor. The angular displacement sensor converts the angular displacement of the pedal into two electrical signal outputs, one of which is an analog signal that increases with the increase of the angular displacement, and the other is a switch signal. The controller controls the opening of the solenoid valve according to the size of the analog signal, thereby accurately controlling the degree of clutch separation. The switch signal is connected to the cut-off valve, which is used to cut off the oil pump output in the event of analog signal failure to ensure vehicle safety.

Description

Technical Field

[0001] The invention relates to the technical field of clutch control of vehicles such as tractors, and in particular to a dual-output electronic clutch pedal. Background Art

[0002] In traditional tractor clutch control, mechanical clutch structure is mostly used, which is not precise enough to meet the needs of modern intelligent and refined vehicle control. With the development of electronic technology, electronic clutch pedals are gradually emerging, but existing electronic clutch pedals often have problems such as single function and insufficient reliability, and the accuracy and safety redundancy of clutch control need to be further improved. Summary of the invention

[0003] The purpose of the present invention is to provide a dual-output electronic clutch pedal, which can accurately control the degree of clutch separation and has a redundant protection function, thereby improving the reliability and safety of clutch control.

[0004] Specifically, the dual-output electronic clutch pedal includes a pedal assembly, a shaft assembly, and an angular displacement sensor. One end of the rotating shaft assembly is connected to the pedal assembly, and the other end is connected to the angular displacement sensor; The angular displacement sensor converts the angular displacement of the pedal into two electrical signal outputs, one of which is an analog signal that increases as the angular displacement increases, and the other is a switch signal.

[0005] Furthermore, the pedal assembly can rotate at an angle of 0 to 30°.

[0006] Furthermore, the analog signal is a voltage signal or a current signal.

[0007] Furthermore, the angular displacement sensor includes a magnet and a Hall chip. The Hall array in the Hall chip inputs the detected magnetic field strength into the analog-to-digital converter, and then inputs it into the digital signal processor after signal conversion. The digital signal processor outputs two signals, one of which is an analog signal, such as a voltage or current signal, after passing through the digital-to-analog converter; the other is a switch signal, which outputs a high-level signal when the angle reaches a threshold.

[0008] When the pedal assembly is subjected to force, it drives the shaft assembly to rotate, thereby driving the angular displacement sensor magnet to rotate. The Hall chip outputs two signals, among which signal 1 increases with the increase of the pedal angle. This signal is output to the controller, and the controller controls the opening of the solenoid valve according to the size of this voltage signal, thereby accurately controlling the degree of clutch separation.

[0009] Signal 2 is connected to the cut-off valve, which is used to cut off the oil pump output when the analog signal fails. When the pedal angle reaches the threshold, the output is high, the relay is energized and closed, and the redundant protection circuit is activated, so that the switch valve is closed, the oil pump is cut off from output, and the clutch is completely separated from the power source.

[0010] The present invention has at least the following beneficial effects: 1. Precise control: Through the coordinated work of the signal 1 of the angular displacement sensor, the controller and the solenoid valve, the degree of clutch separation can be precisely controlled to meet the clutch requirements under different working conditions and improve the comfort and controllability of tractor driving.

[0011] 2. Redundant protection: Signal 2 can be electrically connected to the intermediate relay and the cut-off valve to form a redundant protection circuit. When the pedal angle reaches a certain threshold, it can quickly cut off the connection between the power source and the clutch, effectively preventing the risk of clutch loss of control due to controller or reversing valve failure, greatly improving the reliability and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of a dual-output electronic clutch pedal; Figure 2 It is a schematic diagram of the changing state of the electronic clutch pedal assembly; Figure 3 A schematic diagram showing the voltage output by the electronic clutch pedal changing with angle; Figure 4 It is a schematic diagram of the dual output redundant protection circuit structure; Among them, 1-dual output electronic separator, 11-pedal assembly, 12-rotating shaft assembly, 13-angular displacement sensor, 2-controller, 3-reversing valve, 4-switch valve, 5-clutch. DETAILED DESCRIPTION

[0013] In order to make the technical solutions and advantages of the present invention clearer, the following will be combined with the accompanying drawings to clearly and completely describe the implementation methods of the present invention. Obviously, the described embodiments are only some embodiments of the present invention. Based on the described embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] The terms "connected", "connected" and the like in the present invention should be understood in a broad sense.

[0015] Combination Figure 1-2The dual-output electronic clutch pedal includes a pedal assembly 1, a shaft assembly 2, and an angular displacement sensor 3. One end of the shaft assembly is connected to the pedal assembly, and the other end is connected to the angular displacement sensor. When the pedal assembly is subjected to force, it drives the shaft assembly to rotate, thereby driving the angular displacement sensor magnet to rotate. The Hall chip of the angular displacement sensor outputs two electrical signals, one of which is an analog signal that increases with the increase of angular displacement, and the other is a digital signal.

[0016] The angular displacement sensor includes a magnet and a Hall chip. The rotation of the pedal drives the magnet to rotate, and the magnetic field strength changes. The Hall array in the Hall chip inputs the detected magnetic field strength into the analog-to-digital converter, and then inputs it into the digital signal processor after signal conversion. The digital signal processor outputs two signals after processing. One signal is an analog signal after the digital-to-analog converter, such as a voltage or current signal. In the present invention, the voltage signal is used as an example for explanation; the other output is a switch signal.

[0017] Combination Figure 2-3 When the driver steps on the clutch pedal from the initial position A to the final position C, the output voltage of signal 1 is linearly related to the angle. Preferably, the rotation angle range of the pedal assembly is 0-30°, and the output voltage range is 0.5-4.5V. The controller controls the opening of the solenoid valve according to the input voltage signal, thereby controlling the degree of clutch separation. When the pedal angle value reaches the threshold, preferably, the threshold is 27°, signal 2 outputs a 4.5V voltage signal, and the redundant protection circuit is activated to separate the vehicle clutch from the power source to ensure safe parking of the vehicle.

[0018] Combination Figure 3-4 The dual-output electronic clutch pedal draws power from the vehicle, with an initial voltage of about 0.5V. The output signal 1 increases with the increase of the pedal angle. Signal 1 is output to the controller 2. The controller calculates the opening instruction required by the reversing valve 3 according to the preset algorithm and sends it to the reversing valve 3. The reversing solenoid valve adjusts the opening accordingly, thereby accurately controlling the degree of clutch separation.

[0019] Signal 2 is output to the switch valve. In practical applications, signal 2 can be connected to an intermediate relay to use a small current / low voltage to control a large current / high voltage to protect the circuit. When the pedal angle reaches the threshold, the switch signal is output, the intermediate relay is powered on and closed, and the redundant protection circuit is started, so that the switch valve 4 is closed, and the oil pump is cut off from outputting to the outside, ensuring that the clutch is completely separated from the power source. When some components of the control circuit connected to the signal 1 output by the pedal fail or get stuck, the oil output cannot be cut off, and the clutch cannot be separated, the switch valve is driven to close through signal 2, and the oil pump is cut off from supplying oil to the outside, so that the clutch is separated from the engine flywheel, so as to avoid the vehicle being unable to stop and causing safety hazards.

[0020] The dual-output electronic clutch pedal of the present invention draws power from the vehicle and outputs two signals according to the angle of the pedal. Signal 1 increases as the pedal angle increases and is output to the controller. The controller controls the opening of the solenoid valve based on this signal to accurately control the degree of clutch separation. Signal 2 outputs a switching signal when the pedal angle reaches a threshold value, and starts a redundant protection circuit to ensure that the vehicle clutch is completely separated from the power source. When the control circuit of signal 1 fails and the oil circuit output cannot be cut off, the clutch can also be separated from the engine flywheel to avoid safety hazards.

Claims

1. A dual-output electronic clutch pedal, characterized in that: Including pedal assembly, shaft assembly, angular displacement sensor, One end of the rotating shaft assembly is connected to the pedal assembly, and the other end is connected to the angular displacement sensor; The angular displacement sensor converts the angular displacement of the pedal into two electrical signal outputs, one of which is an analog signal that increases as the angular displacement increases; the other is a switch signal that outputs a high-level signal when the angle reaches a threshold.

2. The dual-output electronic clutch pedal according to claim 1, characterized in that: The switch signal is connected to the cut-off valve and is used to cut off the oil pump output when the analog signal fails.

3. The dual-output electronic clutch pedal according to claim 1, characterized in that: The angular displacement sensor comprises a magnetic steel and a Hall chip.

4. The dual-output electronic clutch pedal according to claim 3, characterized in that: The Hall array in the Hall chip inputs the detected magnetic field strength into the analog-to-digital converter respectively, and then inputs it into the digital signal processor after signal conversion. The digital signal processor outputs two signals, one of which is an analog signal after the digital-to-analog converter, and the other is a digital signal.

5. The dual-output electronic clutch pedal according to claim 1, characterized in that: The pedal assembly rotates in an angle range of 0 to 30 degrees.

6. The dual-output electronic clutch pedal according to claim 1, characterized in that: The analog signal is a voltage signal or a current signal.

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