CDC solenoid valve working current adjusting circuit

Abstract

The utility model discloses a CDC electromagnetic valve working current adjusting circuit which comprises a sampling circuit, an amplifying circuit, an electromagnetic valve driving chip and an MCU controller. The input end of the sampling circuit receives a working current signal of the CDC electromagnetic valve, and the output end of the sampling circuit transmits the working current signal to the amplifying circuit; the input end of the amplifying circuit receives the working current signal output by the sampling circuit, and the output end of the amplifying circuit transmits the amplified working current signal to the MCU controller and the electromagnetic valve driving chip; the feedback input end of the electromagnetic valve driving chip receives the working current signal amplified by the amplifying circuit, and the output end of the electromagnetic valve driving chip sends a driving signal to the CDC electromagnetic valve to adjust the working current of the CDC electromagnetic valve for the first time; the feedback input end of the MCU controller receives the working current signal which is adjusted and amplified for the first time by the amplifying circuit, and the output end of the MCU controller sends a control signal to the electromagnetic valve driving chip to control the electromagnetic valve driving chip to send a driving signal to the CDC electromagnetic valve to adjust the working current of the CDC electromagnetic valve for the second time.

Description

Technical Field

[0001] The utility model relates to the field of CDC solenoid valve control systems, in particular to a CDC solenoid valve working current regulating circuit. Background Art

[0002] The CDC (Continuous Damping Control) solenoid valve is a damping control solenoid valve for the shock absorber of a car's suspension system. It primarily adjusts the valve opening by controlling the magnitude of the current, thereby changing the flow resistance of the oil in the shock absorber. Specifically, the shock absorber adds an intermediate chamber and a CDC solenoid valve between the upper and lower chambers to cooperate with the flow valve, extension valve, and compression valve to allow the oil to flow through the intermediate chamber. The current method of adjusting the operating current of the CDC solenoid valve is mainly for the controller to adjust the operating current of the CDC solenoid valve, thereby changing the size of the throttling channel to achieve continuous adjustment of the damping during extension and compression. However, the controller only adjusts the operating current of the CDC solenoid valve, which is a single adjustment, resulting in low adjustment accuracy and poor vehicle handling performance. Utility Model Content

[0003] The utility model provides a dual-regulated CDC solenoid valve working current regulating circuit to improve the precision of CDC solenoid valve working current regulation and the control performance of the vehicle.

[0004] The utility model of the CDC solenoid valve high-precision current control circuit, including a sampling circuit, an amplifier circuit, a solenoid valve driver chip, MCU control;

[0005] The input end of the sampling circuit receives the working current signal of the CDC solenoid valve, and the output end transmits the working current signal to the amplifying circuit;

[0006] The input end of the amplifier circuit receives the working current signal output by the sampling circuit, and the output end transmits the amplified working current signal to the MCU controller and the solenoid valve drive chip;

[0007] The feedback input terminal of the solenoid valve driving chip receives the working current signal amplified by the amplifier circuit, and the output terminal sends a driving signal to the CDC solenoid valve to initially adjust the working current of the CDC solenoid valve;

[0008] The feedback input end of the MCU controller receives the working current signal after the initial adjustment and amplification by the amplifier circuit, and the output end sends a control signal to the solenoid valve driver chip, which controls the solenoid valve driver chip to send a drive signal to the CDC solenoid valve for secondary adjustment of the working current of the CDC solenoid valve.

[0009] The CDC solenoid valve working current regulation circuit described in the present invention is characterized in that the solenoid valve driver chip receives the working current signal amplified by the amplifier circuit, and sends a driving signal to the CDC solenoid valve to initially regulate the working current of the CDC solenoid valve. Then, the MCU controller receives the working current signal amplified by the amplifier circuit and controls the solenoid valve driver chip to send a driving signal to the CDC solenoid valve to secondary regulate the working current of the CDC solenoid valve, thereby improving the accuracy of the CDC solenoid valve working current regulation and the vehicle's controllability. In addition, the collected working current is amplified by the amplifier circuit and output to the solenoid valve driver chip and the MCU controller, so that the solenoid valve driver chip and the MCU controller can obtain a more accurate working current value of the CDC solenoid valve, thereby better controlling and regulating the working current of the CDC solenoid valve, further improving the accuracy of the CDC solenoid valve working current regulation and the vehicle's controllability.

[0010] As a preferred solution of the present invention, the input end of the MCU controller is electrically connected to the vehicle body posture sensor, and receives the vehicle body posture data detected by the vehicle body posture sensor, and sends a control signal to the solenoid valve driver chip from the output end, controlling the solenoid valve driver chip to send a drive signal to the CDC solenoid valve.

[0011] As a preferred solution of the present invention, the MCU controller is provided with a data storage unit and a current calibration unit; the data storage unit stores the vehicle body posture data; the current calibration unit receives the amplified working current signal after the initial adjustment, and retrieves the vehicle body posture data from the data storage unit for calibration output.

[0012] As a preferred solution of the present invention, an APP control unit is provided in the MCU controller, which receives the vehicle body posture data electrically connected to the input end of the MCU controller and outputs the calibration data from the current calibration unit, and outputs it to the output end of the MCU controller.

[0013] As a preferred solution of the present invention, the sampling circuit includes a sampling resistor, one end of the sampling resistor is electrically connected to the CDC solenoid valve, and the other end is electrically connected to the solenoid valve drive chip.

[0014] As a preferred solution of the present invention, the amplification circuit includes an operational amplifier, the non-inverting input terminal of the operational amplifier is electrically connected to one end of the sampling resistor, the inverting input terminal is electrically connected to the other end of the sampling resistor, and the output terminal is electrically connected to the feedback input terminal of the solenoid valve driver chip and the feedback input terminal of the MCU controller.

[0015] As a preferred solution of the present invention, sampling resistors and operational amplifiers electrically connected to the sampling resistors are provided on the left front CDC solenoid valve, right front CDC solenoid valve, left rear CDC solenoid valve, and right rear CDC solenoid valve of the vehicle.

[0016] As a preferred solution of the present invention, an SPI bus is provided between the output end of the MCU controller and the input end of the solenoid valve driver chip, one end of the SPI bus is electrically connected to the output end of the MCU controller, and the other end is electrically connected to the input end of the solenoid valve driver chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a circuit diagram of a CDC solenoid valve working current regulating circuit of the utility model. DETAILED DESCRIPTION

[0018] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] A CDC solenoid valve working current regulation circuit, such as Figure 1 As shown, it includes a sampling circuit, an amplifying circuit, a solenoid valve driving chip U2, and an MCU controller U1; the input end of the sampling circuit receives the working current signal of the CDC solenoid valve, and the output end transmits the working current signal to the amplifying circuit; the input end of the amplifying circuit receives the working current signal output by the sampling circuit, and the output end transmits the amplified working current signal to the MCU controller and the solenoid valve driving chip; the feedback input end of the solenoid valve driving chip receives the amplified working current signal of the amplifying circuit, and the output end sends a driving signal to the CDC solenoid valve to initially adjust the working current of the CDC solenoid valve; the feedback input end of the MCU controller receives the amplified working current signal of the amplifying circuit for the initial adjustment, and the output end sends a control signal to the solenoid valve driving chip, which controls the solenoid valve driving chip to send a driving signal to the CDC solenoid valve to secondarily adjust the working current of the CDC solenoid valve.

[0020] The MCU controller is equipped with a data storage unit, a current calibration unit and an APP control unit. The input end of the MCU controller is electrically connected to the vehicle body posture sensor, and receives the vehicle body posture data detected by the vehicle body posture sensor, transmits the vehicle body posture data to the APP control unit, and also stores the vehicle body posture data in the data storage unit. The vehicle body posture data transmitted by the APP control unit is transmitted to the solenoid valve driver chip through the output end of the MCU controller and sends a drive signal to the CDC solenoid valve. The CDC solenoid valve generates a working current, and the sampling resistor R of the sampling circuit samples the working current signal generated by the CDC solenoid valve. The operational amplifier U3 of the amplification circuit amplifies the sampled working current signal and transmits it to the solenoid valve driver chip, and the solenoid valve driver The dynamic chip sends a driving signal to the CDC solenoid valve to initially adjust the working current of the CDC solenoid valve. At this time, the sampling resistor R of the sampling circuit continues to sample the working current signal generated by the CDC solenoid valve after the initial adjustment. The operational amplifier U3 of the amplification circuit amplifies the sampled working current signal and transmits it to the current calibration unit of the MCU controller. The current calibration unit retrieves the vehicle body posture data from the data storage unit to calibrate the working current signal after the initial adjustment and outputs it to the APP control unit. The APP control unit controls the solenoid valve driver chip to send a driving signal to the CDC solenoid valve through the output end of the MCU controller to secondary adjust the working current of the CDC solenoid valve, further improving the accuracy of the CDC solenoid valve working current regulation and the vehicle's handling performance.

[0021] The MCU controller U1 may adopt an MCU controller of model SAK-XC2365B-40F80LR AB, and the solenoid valve driver chip U2 may adopt a solenoid valve driver chip of model TLE8242-2L.

[0022] One end of the sampling resistor R in the sampling circuit is electrically connected to the CDC solenoid valve, and the other end is electrically connected to the solenoid valve driver chip. The operational amplifier U3 in the amplification circuit has its non-inverting input electrically connected to one end of the sampling resistor, its inverting input electrically connected to the other end of the sampling resistor, and its output electrically connected to the feedback input of the solenoid valve driver chip and the feedback input of the MCU controller.

[0023] In addition, by providing sampling resistors on the left front CDC solenoid valve, right front CDC solenoid valve, left rear CDC solenoid valve, and right rear CDC solenoid valve of the vehicle, and operational amplifiers electrically connected to the sampling resistors, the CDC solenoid valves in the front, back, left, and right directions of the vehicle body can all collect data, and then perform secondary adjustment on the working current of the CDC solenoid valves, further improving the accuracy of the CDC solenoid valve working current regulation and the vehicle's handling performance.

[0024] In addition, an SPI bus is provided between the output end of the MCU controller and the input end of the solenoid valve driver chip. One end of the SPI bus is electrically connected to the output end of the MCU controller, and the other end is electrically connected to the input end of the solenoid valve driver chip. Communication through the SPI bus can make the data transmission rate faster.

[0025] The above embodiments are merely illustrative of the detailed embodiments of the present invention. The present invention is not limited to the detailed embodiments described above, nor does it imply that the present invention must rely on the detailed embodiments described above in order to be implemented. Persons skilled in the art should understand that any improvements to the present invention, equivalent replacements of raw materials for the present invention, addition of auxiliary ingredients, and selection of specific methods, etc., fall within the scope of protection and disclosure of the present invention.

Claims

1. A CDC solenoid valve working current regulating circuit, characterized in that: Including sampling circuit, amplifying circuit, solenoid valve driver chip (U2), MCU controller (U1); The input end of the sampling circuit receives the working current signal of the CDC solenoid valve, and the output end transmits the working current signal to the amplifying circuit; The input end of the amplifier circuit receives the working current signal output by the sampling circuit, and the output end transmits the amplified working current signal to the MCU controller and the solenoid valve drive chip; The feedback input terminal of the solenoid valve driving chip receives the working current signal amplified by the amplifier circuit, and the output terminal sends a driving signal to the CDC solenoid valve to initially adjust the working current of the CDC solenoid valve; The feedback input end of the MCU controller receives the working current signal after the initial adjustment and amplification by the amplifier circuit, and the output end sends a control signal to the solenoid valve driver chip, which controls the solenoid valve driver chip to send a drive signal to the CDC solenoid valve for secondary adjustment of the working current of the CDC solenoid valve.

2. The CDC solenoid valve operating current regulating circuit according to claim 1, characterized in that: The input end of the MCU controller is electrically connected to the vehicle body posture sensor and receives the vehicle body posture data detected by the vehicle body posture sensor. The output end sends a control signal to the solenoid valve drive chip, which controls the solenoid valve drive chip to send a drive signal to the CDC solenoid valve.

3. The CDC solenoid valve operating current regulating circuit according to claim 2, characterized in that: The MCU controller is provided with a data storage unit and a current calibration unit; The data storage unit stores vehicle body posture data; The current calibration unit receives the amplified working current signal after the initial adjustment, and retrieves the vehicle body posture data from the data storage unit for calibration output.

4. The CDC solenoid valve operating current regulating circuit according to claim 3, characterized in that: The MCU controller is provided with an APP control unit, which receives the vehicle body posture data electrically connected to the input end of the MCU controller and outputs the calibration data from the current calibration unit and outputs it to the output end of the MCU controller.

5. The CDC solenoid valve operating current regulating circuit according to claim 1, characterized in that: The sampling circuit includes a sampling resistor (R), one end of the sampling resistor is electrically connected to the CDC solenoid valve, and the other end is electrically connected to the solenoid valve drive chip.

6. The CDC solenoid valve operating current regulating circuit according to claim 5, characterized in that: The amplification circuit comprises an operational amplifier (U3), wherein a non-inverting input terminal of the operational amplifier is electrically connected to one end of a sampling resistor, an inverting input terminal is electrically connected to the other end of the sampling resistor, and an output terminal is electrically connected to a feedback input terminal of a solenoid valve drive chip and a feedback input terminal of an MCU controller.

7. The CDC solenoid valve operating current regulating circuit according to claim 6, characterized in that: A sampling resistor and an operational amplifier electrically connected to the sampling resistor are provided on the left front CDC solenoid valve, the right front CDC solenoid valve, the left rear CDC solenoid valve, and the right rear CDC solenoid valve of the vehicle.

8. The CDC solenoid valve operating current regulating circuit according to any one of claims 1 to 7, characterized in that: An SPI bus is provided between the output end of the MCU controller and the input end of the solenoid valve driver chip. One end of the SPI bus is electrically connected to the output end of the MCU controller, and the other end is electrically connected to the input end of the solenoid valve driver chip.

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