A gear shift execution control system for a gear shifter

Abstract

The present invention belongs to the technical field of electronic control of gear shifters, and provides a gear shift execution control system for a gear shifter, comprising: a control module, a sensor detection module, a motor drive module, and a signal input and output module; the sensor detection module, the motor drive module, and the signal input and output module are all connected to the control module, the motor drive module is used to control the rotation of the motor according to the control signal sent by the control module, the sensor detection module is used to detect the rotation angle of the motor, and the signal input and output module is used to output the information received by the control module. The advantage of the present invention is that the drive control of the motor in the gear shift actuator is controlled by the pre-driver chip and the full-bridge drive unit, so that the rotation of the motor is more precise, thereby improving the smoothness of the vehicle gear shifting. The present invention also uses a Hall sensor to collect the position information of the motor in real time and feed it back to the control chip U1A, so that the control chip can accurately control the gear shifting.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic control of a gear shifter, and in particular to a gear shift execution control system of a gear shifter. Background Art

[0002] The gear shifter is an essential component of modern cars. Through manual movement, the gear shifter coordinates with the transmission to match engine speed with wheel speed, enabling the car to achieve both high torque at low speeds and high speed at highway speeds. As social demands change, the gear shifter has evolved from initially manual to today's automated manual transmissions, and shifting methods have evolved from simple mechanical cables to today's electronic shifting.

[0003] Nowadays, when an electronic shift system is selected, the shift control is usually performed by driving the shift lever through an electric motor. However, there are still deficiencies in the accuracy of the shift control and the protection of the motor. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a shift execution control system for a shifter to solve the problem of insufficiently precise shift control.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A shift execution control system for a shifter, comprising: a control module, a sensor detection module, a motor drive module and a signal input and output module;

[0007] The sensing detection module, motor drive module and signal input and output module are all connected to the control module. The motor drive module is used to control the rotation of the motor according to the control signal sent by the control module. The sensing detection module is used to detect the rotation angle of the motor. The signal input and output module is used to output the information received by the control module.

[0008] Furthermore, the control module includes a control chip U1A and peripheral circuits, a power input and conversion unit, and a voltage sampling unit;

[0009] The power input and conversion unit is used to input power into the control chip U1A and convert the input power into a first output power through the power chip built into the control chip U1A. The output power is used to power the motor drive module;

[0010] The voltage sampling unit is connected to the control chip U1A and is used to collect the working status of the output power supply.

[0011] Furthermore, the voltage sampling unit includes a first voltage sampling circuit connected to the second pin of the control chip U1A;

[0012] The first voltage sampling circuit includes a resistor R4A, a capacitor C13A, a transistor Q1A, a resistor R9A, a resistor R6A, a diode D1A, a voltage stabilizing diode DZ1A, a capacitor C12A, and a capacitor C14A;

[0013] One end of resistor R4A is connected to the power input and conversion unit, and the other end is connected to the second pin of control chip U1A; the second pin of control chip U1A is also connected to the collector of transistor Q1A, one end of capacitor C13A is connected to the collector of transistor Q1A, and the other end is connected to the emitter of transistor Q1A, and the emitter of transistor Q1A is also grounded; the base of transistor Q1A is connected to one end of resistor R6A, and the other end of resistor R6A is connected to the cathode of diode D1A, two ends of resistor R9A are respectively connected to the base and emitter of transistor Q1A, the anode of diode D1A is connected to one end of capacitor C12A, and the other end of capacitor C12A is grounded through capacitor C14A, one end of Zener diode DZ1A is connected to the anode of diode D1A, and the other end of Zener diode DZ1A is grounded.

[0014] Furthermore, the voltage sampling unit further includes a second voltage sampling circuit, which is connected to the twenty-second pin of the control chip U1A;

[0015] The second voltage sampling circuit includes a resistor R1A, a resistor R2A, a capacitor C9A and a diode Z1A;

[0016] The cathode of diode Z1A is connected to pin 22 of control chip U1A, the anode of diode Z1A is grounded, capacitor C9A is connected in parallel to both ends of diode Z1A, resistor R2A is connected in parallel to both ends of capacitor C9A, one end of resistor R1A is connected to pin 22 of control chip U1A, and the other end is connected to the power supply.

[0017] Furthermore, the motor drive module includes a drive control unit, a power reverse connection protection unit and a full-bridge drive unit;

[0018] The drive control unit includes a pre-drive control chip U1C and its peripheral circuits. The pre-drive control chip U1C is connected to the control chip U1A and the full-bridge drive unit respectively. The power reverse connection protection unit is connected to the full-bridge drive unit.

[0019] Furthermore, the full-bridge drive unit includes a MOS transistor Q5C, a MOS transistor Q4C, a MOS transistor Q7C, and a MOS transistor Q6C; the MOS transistor Q5C is respectively connected to the output power supply, the fourteenth pin of the pre-driver control chip U1C, and the positive electrode of the motor; the MOS transistor Q4C is respectively connected to the output power supply, the seventeenth pin of the pre-driver control chip U1C, and the negative electrode of the motor; the MOS transistor Q7C is respectively connected to the output power supply, the twenty-first pin of the pre-driver control chip U1C, and the positive electrode of the motor; and the MOS transistor Q6C is respectively connected to the output power supply, the twenty-second pin of the pre-driver control chip U1C, and the negative electrode of the motor.

[0020] Furthermore, the sensing detection module includes a sensing power conversion unit and a sensing signal input unit;

[0021] The sensor power conversion unit is used to convert the output power into the working power required by the sensor to power the sensor;

[0022] The sensor signal input unit is connected to the sensor and is used to transmit the signal collected by the sensor to the control chip U1A.

[0023] Furthermore, the signal input and output module includes a PWM signal input unit and a P gear signal output unit;

[0024] The PWM signal input unit and the P gear signal output unit are both electrically connected to the control chip U1A.

[0025] Furthermore, it also includes a CAN communication module, the CAN communication module is electrically connected to the control module;

[0026] The CAN communication module is used to send vehicle information to the control chip U1A, and send the motor information received by the control chip U1A to the vehicle control center.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects:

[0028] (1) The present invention collects power supply voltage information in real time through a voltage sampling unit, and the control chip U1A can promptly handle power supply problems that occur;

[0029] (2) The present invention controls the drive control of the motor in the shift actuator through the pre-driver chip and the full-bridge drive unit, making the rotation of the motor more precise, thereby improving the smoothness of the vehicle's shifting;

[0030] (3) The present invention collects the position information of the motor in real time through the Hall sensor and feeds it back to the control chip U1A, so that the control chip can accurately control the gear shift. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a general structural framework diagram of an embodiment of the present invention;

[0032] Figure 2 is a circuit diagram of a control module and a CAN communication module in an embodiment of the present invention;

[0033] Figure 3 is a circuit diagram of a motor drive module in an embodiment of the present invention;

[0034] Figure 4 is a circuit diagram of a sensing detection module in an embodiment of the present invention;

[0035] Figure 5 4 is a circuit diagram of the signal input and output module in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0037] like Figure 1 As shown, a shift execution control system of a shifter of the present invention includes a control module, a sensor detection module, a motor drive module and a signal input and output module.

[0038] The sensing detection module, motor drive module and signal input and output module are all connected to the control module. The motor drive module is used to control the rotation of the motor according to the control signal sent by the control module. The sensing detection module is used to detect the rotation angle of the motor. The signal input and output module is used to output the information received by the control module.

[0039] Specifically, such as Figure 2 As shown, the control module includes a control chip U1A and peripheral circuits, a power input and conversion unit, and a voltage sampling unit;

[0040] The chip model of the control chip U1A is S912ZVC12F0VKHR, and its peripheral circuits include a crystal oscillator circuit, a reset circuit, etc. The crystal oscillator circuit is connected to the sixth pin and the seventh pin of the control chip U1A.

[0041] The power input and conversion unit filters and rectifies the KL30 input power through the voltage regulator diode DZ1C, multiple capacitors and inductor L1C, and obtains the input power voltage VSUP by turning on the MOS tube Q1C.

[0042] The input power supply voltage VSUP is filtered again by multiple capacitors and input to the control chip U1A. The power chip built into the control chip U1A converts the input power into a first output power supply, i.e., 5V voltage. This 5V output power supply is used to power the motor drive module.

[0043] The voltage sampling unit is connected to the control chip U1A and is used to collect the working status of the output power supply.

[0044] The voltage sampling unit includes a first voltage sampling circuit and a second voltage sampling circuit. The first voltage sampling circuit includes a resistor R4A, a capacitor C13A, a transistor Q1A, a resistor R9A, a resistor R6A, a diode D1A, a Zener diode DZ1A, a capacitor C12A and a capacitor C14A.

[0045] One end of resistor R4A is connected to the power input and conversion unit, and the other end is connected to the second pin of control chip U1A; the second pin of control chip U1A is also connected to the collector of transistor Q1A, one end of capacitor C13A is connected to the collector of transistor Q1A, and the other end is connected to the emitter of transistor Q1A, and the emitter of transistor Q1A is also grounded; the base of transistor Q1A is connected to one end of resistor R6A, and the other end of resistor R6A is connected to the cathode of diode D1A, two ends of resistor R9A are respectively connected to the base and emitter of transistor Q1A, the anode of diode D1A is connected to one end of capacitor C12A, and the other end of capacitor C12A is grounded through capacitor C14A, one end of Zener diode DZ1A is connected to the anode of diode D1A, and the other end of Zener diode DZ1A is grounded.

[0046] The second voltage sampling circuit includes a resistor R1A, a resistor R2A, a capacitor C9A and a diode Z1A. The cathode of the diode Z1A is connected to the 22nd pin of the control chip U1A, the anode of the diode Z1A is grounded, the capacitor C9A is connected in parallel to both ends of the diode Z1A, the resistor R2A is connected in parallel to both ends of the capacitor C9A, one end of the resistor R1A is connected to the 22nd pin of the control chip U1A, and the other end is connected to the power supply.

[0047] The voltage sampling unit collects the working status of the output voltage, and the control chip U1A can determine the working status of each power supply to avoid power outages.

[0048] One end of the CAN communication module is connected to the 28th pin, the 29th pin and the 31st pin of the control chip U1A, and the other end of the CAN communication module is connected to the CAN communication bus.

[0049] The CAN communication module is used to send vehicle information, such as vehicle speed information, to the control chip U1A. The control chip U1A can then determine whether the gear needs to be changed based on the vehicle speed information. The CAN communication module can also send the motor information received by the control chip U1A to the vehicle control center.

[0050] like Figure 3As shown, the motor drive module includes a drive control unit, a power reverse connection protection unit and a full-bridge drive unit.

[0051] Among them, the drive control unit includes a pre-drive control chip U1C and its peripheral circuits. The chip model of the pre-drive control chip U1C is MLX83100LGO-DCA-000-SP. The first pin, second pin, ninth pin and tenth pin of the pre-drive control chip U1C are respectively connected to the forty-first pin, sixtieth pin, thirty-ninth pin and fifty-fourth pin of the control chip U1A. The fourteenth pin, seventeenth pin, twenty-first pin and twenty-second pin of the pre-drive control chip U1C are all connected to the full-bridge drive unit, and the power reverse connection protection unit is also connected to the full-bridge drive unit.

[0052] The power reverse connection protection unit includes a transistor Q3C, a resistor R4C, a diode Z2C, a resistor R3C, a MOS transistor Q2C, a resistor R6C, a resistor R7C, a capacitor C22C, and a diode Z3C.

[0053] The base of the transistor Q3C is connected to the tenth pin of the control chip U1A, and the anode of the diode Z3C is connected to the fourteenth pin of the control chip U1A.

[0054] Under normal conditions, the tenth pin of the control chip U1A sends a low-level signal to turn off the transistor Q3C, thereby transmitting the power supply voltage to the full-bridge drive unit through the MOS tube Q2C, and sending a feedback signal to the control chip U1A through the fourteenth pin of the control chip U1A. When the power supply is reversed, the abnormal situation is sent to the control chip U1A, and a high-level signal is output through the tenth pin of the control chip U1A to turn on the transistor Q3C and turn off the MOS tube Q2C, so that the power supply cannot be transmitted to the full-bridge drive unit.

[0055] The full-bridge drive unit includes a MOS transistor Q5C, a MOS transistor Q4C, a MOS transistor Q7C, and a MOS transistor Q6C; the MOS transistor Q5C is respectively connected to the output power supply, the fourteenth pin of the pre-driver control chip U1C, and the positive electrode of the motor; the MOS transistor Q4C is respectively connected to the output power supply, the seventeenth pin of the pre-driver control chip U1C, and the negative electrode of the motor; the MOS transistor Q7C is respectively connected to the output power supply, the twenty-first pin of the pre-driver control chip U1C, and the positive electrode of the motor; and the MOS transistor Q6C is respectively connected to the output power supply, the twenty-second pin of the pre-driver control chip U1C, and the negative electrode of the motor.

[0056] When the motor needs to rotate forward, the fourteenth and seventeenth pins of the pre-drive control chip U1C send high-level signals to turn on the MOS tube Q5C and the MOS tube Q6C, so that the power energy can pass through the MOS tube Q5C, the motor and the MOS tube Q6C, causing the motor to rotate forward.

[0057] When the motor needs to be reversed, the 21st and 22nd pins of the pre-drive control chip U1C send high-level signals to turn on the MOS tube Q4C and the MOS tube Q7C, so that the power energy can pass through the MOS tube Q4C, the motor and the MOS tube Q7C, causing the motor to reverse.

[0058] like Figure 3 As shown, the sensor detection module includes a sensor power conversion unit and a sensor signal input unit. The sensor power conversion unit is used to convert the output power into the operating power required by the sensor, thus providing power to the sensor. The sensor power conversion unit includes a power conversion chip U1B and its peripheral circuits. The power conversion unit converts the input power voltage VSUP to the 5V power required for sensor operation through the power conversion chip U1B.

[0059] The sensing signal input unit is connected to the sensor and is used to transmit the signal collected by the sensor to the control chip U1A. The sensor is a Hall sensor.

[0060] The present invention collects the position information of the motor in real time through the Hall sensor and feeds it back to the control chip U1A, so that the control chip can accurately control the gear shift.

[0061] The sensing signal input unit includes a capacitor C1D, a capacitor C3D, an electrostatic protection diode D1D, a resistor R1D, a resistor R2D, a resistor R3D, a resistor R4D, a capacitor C2D, and a capacitor C4D.

[0062] Among them, capacitor C1D and capacitor C3D are both connected to the sensor, while capacitor C2D and capacitor C4D are respectively connected to the sixteenth pin and fifteenth pin of the control chip U1A. Through this circuit, the motor position information collected by the sensor is low-pass filtered and transmitted to the control chip U1A, so that the control chip U1A can judge whether the rotation angle of the motor is in line with expectations based on the motor position information collected by the sensor.

[0063] like Figure 5 As shown, the signal input and output module includes a PWM signal input unit and a P gear signal output unit; the PWM signal input unit and the P gear signal output unit are both electrically connected to the control chip U1A.

[0064] The PWM signal input unit includes a capacitor C1E, a voltage-stabilizing diode D1E, a resistor R1E, ​​a resistor R2E and a capacitor C2E, wherein one end of the capacitor C1E is connected to the external signal output end, and one end of the capacitor C2E is connected to the fifty-third pin of the control chip U1A. The unit accepts external signal input and, through low-pass filtering, sends the external PWM signal to the control chip U1A. The control chip U1A performs corresponding processing based on the external signal.

[0065] The P gear signal output unit includes transistor Q1F, transistor Q2F, resistor R1F, diode Q1F, resistor R2F, resistor R3F, capacitor C2F, diode Z1F and capacitor C1F. The base of transistor Q2F is connected to the eleventh pin of the control chip U1A, the cathode of diode D1F outputs the P gear signal, and the end of capacitor C1F connected to the cathode of Zener diode Z1F is connected to the seventeenth pin of the control chip U1A.

[0066] When the P gear is turned on, the base of the transistor Q2F receives a low-level signal sent by the control chip U1A, turns off the transistor Q2F, and turns on the transistor Q1F, and then outputs a high-level signal through the P_OUT port, indicating that it is now in the P gear state, and feeds back the P gear signal to the control chip U1A through the P_OUT_AD port.

[0067] When in non-P gear state, transistor Q2F will be turned on and the P_OUT port will not output the P gear signal.

[0068] The present invention uses a voltage sampling unit to collect power supply voltage information in real time, and the control chip U1A can promptly deal with any power supply problems. It also controls the drive control of the motor in the shift actuator through the pre-driver chip and the full-bridge drive unit, making the rotation of the motor more precise, thereby improving the smoothness of the vehicle's gear shifting.

[0069] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A shift execution control system for a shifter, characterized in that: include: Control module, sensor detection module, motor drive module and signal input and output module; The sensing detection module, the motor drive module and the signal input and output module are all connected to the control module. The motor drive module is used to control the rotation of the motor according to the control signal sent by the control module. The sensing detection module is used to detect the rotation angle of the motor. The signal input and output module is used to output the information received by the control module. The control module includes a control chip U1A, and the motor drive module includes a power supply reverse connection protection unit and a full-bridge drive unit, wherein the power supply reverse connection protection unit is connected to the full-bridge drive unit; The power reverse connection protection unit is configured such that the base of the transistor Q3C is connected to the tenth pin of the control chip U1A, the collector of the transistor Q3C is connected to the gate of the MOS transistor Q2C, the drain of the MOS transistor Q2C is connected to the fourteenth pin of the control chip U1A, the source of the MOS transistor Q2C is connected to the power supply, and the source of the MOS transistor Q2C is connected to the gate of the MOS transistor Q2C through the resistor R3C.

2. The shift execution control system of a shifter according to claim 1, characterized in that: The control module also includes a peripheral circuit, a power input and conversion unit and a voltage sampling unit; The power input and conversion unit is used to input power into the control chip U1A and convert the input power into a first output power through the power chip built into the control chip U1A. The output power is used to power the motor drive module; The voltage sampling unit is connected to the control chip U1A and is used to collect the working status of the output power supply.

3. The shift execution control system of a shifter according to claim 2, characterized in that: The voltage sampling unit includes a first voltage sampling circuit, and the first voltage sampling circuit is connected to the second pin of the control chip U1A; The first voltage sampling circuit includes a resistor R4A, a capacitor C13A, a transistor Q1A, a resistor R9A, a resistor R6A, a diode D1A, a voltage stabilizing diode DZ1A, a capacitor C12A, and a capacitor C14A; one end of the resistor R4A is connected to the power input and conversion unit, and the other end is connected to the second pin of the control chip U1A; the second pin of the control chip U1A is also connected to the collector of the transistor Q1A, one end of the capacitor C13A is connected to the collector of the transistor Q1A, and the other end is connected to the collector of the transistor Q1A. The emitter of transistor Q1A is connected to the emitter of transistor Q1A, and the emitter of transistor Q1A is also grounded; the base of transistor Q1A is connected to one end of resistor R6A, the other end of resistor R6A is connected to the cathode of diode D1A, both ends of resistor R9A are connected to the base and emitter of transistor Q1A respectively, the anode of diode D1A is connected to one end of capacitor C12A, the other end of capacitor C12A is grounded via capacitor C14A, one end of Zener diode DZ1A is connected to the anode of diode D1A, and the other end of Zener diode DZ1A is grounded.

4. The shift execution control system of a shifter according to claim 3, characterized in that: The voltage sampling unit further includes a second voltage sampling circuit, which is connected to the twenty-second pin of the control chip U1A; The second voltage sampling circuit includes a resistor R1A, a resistor R2A, a capacitor C9A and a diode Z1A; the cathode of the diode Z1A is connected to the 22nd pin of the control chip U1A, the anode of the diode Z1A is grounded, the capacitor C9A is connected in parallel to both ends of the diode Z1A, the resistor R2A is connected in parallel to both ends of the capacitor C9A, one end of the resistor R1A is connected to the 22nd pin of the control chip U1A, and the other end is connected to the power supply.

5. The shift execution control system of a shifter according to claim 2, characterized in that: The motor drive module includes a drive control unit and a full-bridge drive unit; The driving control unit includes a pre-driving control chip U1C and its peripheral circuits. The pre-driving control chip U1C is connected to the control chip U1A and the full-bridge driving unit respectively.

6. The shift execution control system of a shifter according to claim 5, characterized in that: The full-bridge drive unit includes a MOS transistor Q5C, a MOS transistor Q4C, a MOS transistor Q7C, and a MOS transistor Q6C; the MOS transistor Q5C is respectively connected to the output power supply, the fourteenth pin of the pre-driver control chip U1C, and the positive electrode of the motor; the MOS transistor Q4C is respectively connected to the output power supply, the seventeenth pin of the pre-driver control chip U1C, and the negative electrode of the motor; the MOS transistor Q7C is respectively connected to the output power supply, the twenty-first pin of the pre-driver control chip U1C, and the positive electrode of the motor; and the MOS transistor Q6C is respectively connected to the output power supply, the twenty-second pin of the pre-driver control chip U1C, and the negative electrode of the motor.

7. The shift execution control system of a shifter according to claim 2, characterized in that: The sensing detection module includes a sensing power conversion unit and a sensing signal input unit; The sensor power conversion unit is used to convert the output power into the working power required by the sensor to power the sensor; The sensor signal input unit is connected to the sensor and is used to transmit the signal collected by the sensor to the control chip U1A.

8. The shift execution control system of a shifter according to claim 2, characterized in that: The signal input and output module includes a PWM signal input unit and a P gear signal output unit; the PWM signal input unit and the P gear signal output unit are both electrically connected to the control chip U1A.

9. The shift execution control system of a shifter according to claim 1, characterized in that: It also includes a CAN communication module, which is electrically connected to the control module; the CAN communication module is used to send vehicle information to the control chip U1A, and send the motor information received by the control chip U1A to the vehicle control center.

Images