Electromagnetic valve driving circuit

Abstract

The utility model relates to the technical field of automobile chassis, solves the technical problems that a driver and passengers feel uncomfortable and the service life of an automobile is shortened due to the fixed damping effect in the prior art, and particularly relates to an electromagnetic valve driving circuit which is characterized in that a driving module is used for actively controlling an electromagnetic valve in the electromagnetic valve driving circuit; comprising a current-limiting resistor R40, a current-limiting resistor R41, a current-limiting resistor R42 and a current-limiting resistor R43 which are respectively connected with an SCK interface, an SI interface, an SO interface and a CSB interface of a driving chip, and the current-limiting resistor R40, the current-limiting resistor R41, the current-limiting resistor R42 and the current-limiting resistor R43 are connected with a switch module through a POS0 interface, an ENG0 interface, an OUT0 interface, a POS1 interface, an ENG1 interface, an OUT1 interface, a POS2 interface, an ENG2 interface, an OUT2 interface, a POS3 interface, an ENG3 interface and an OUT3 interface of the driving chip. The vibration frequency and the road condition of the vehicle can be recognized, the electromagnetic valve is controlled according to the vibration frequency and the road condition, and then the suspension hardness of the damping system is adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile chassis, especially relates to a solenoid valve drive circuit. BACKGROUND

[0002] The solenoid valve of the vehicle generally belongs to a part of the suspension system, and the elastic element in the suspension system vibrates due to impact, in order to improve the ride comfort of the automobile, a shock absorber is installed in parallel with the elastic element in the suspension, which can attenuate vibration, the damping system in the automobile is mainly composed of a spring and a shock absorber, in the damping system of the prior art, the stiffness and damping of the suspension are fixed, in the normal driving process, the fixed damping effect can be achieved, but if the driving surface changes, the damping system cannot meet the original damping requirement, which is easy to make the driver and passenger feel uncomfortable, affects the driving experience of the vehicle, and the excessive vibration is easy to cause damage to the parts of the vehicle, reduces the service life of the vehicle. SUMMARY

[0003] In view of the defects of the prior art, the solenoid valve drive circuit solves the technical problem that the fixed damping effect of the prior art causes the driver and passenger to feel uncomfortable and reduces the service life of the vehicle, and achieves the purpose of greatly improving the driving comfort of the driver and passenger and effectively prolonging the service life of the vehicle.

[0004] To solve the above technical problems, the utility model provides the following technical scheme: a solenoid valve drive circuit, which comprises a micro-processing module, and the solenoid valve drive circuit further comprises a driving module and a switching module for actively controlling the solenoid valve in the solenoid valve drive circuit.

[0005] Further, the driving module comprises current limiting resistors R40, R41, R42 and R43 connected with the SCK interface, the SI interface, the SO interface and the CS_B interface of the driving chip respectively, and the switching module is connected through the POS0 interface, the ENG0 interface, the OUT0 interface, the POS1 interface, the ENG1 interface, the OUT1 interface, the POS2 interface, the ENG2 interface, the OUT2 interface, the POS3 interface, the ENG3 interface and the OUT3 interface of the driving chip.

[0006] Further, the switching module comprises a first solenoid valve module, a second solenoid valve module, a third solenoid valve module and a fourth solenoid valve module.

[0007] Further, the first solenoid valve module comprises solenoid valve interfaces FR+ and FR-, a first MOS tube and a switching resistor R44, the signal of the driving chip passes through the first MOS tube and the sampling resistor R44, and controls the opening and closing action of the solenoid valve through the solenoid valve interfaces FR+ and FR-.

[0008] Further, the second electromagnetic valve module comprises electromagnetic valve interfaces FL+ and FL-, a second MOS tube and a switch resistor R47, the third electromagnetic valve module comprises electromagnetic valve interfaces RR+ and RR-, a third MOS tube and a switch resistor R50, and the fourth electromagnetic valve module comprises electromagnetic valve interfaces RL+ and RL-, a fourth MOS tube and a switch resistor R53.

[0009] Further, the micro processing module comprises a micro processing chip and an external power supply, the external power supply is connected to a VDD interface of the micro processing chip, a GPIO_E2 interface of the micro processing chip transmits a driving signal to the driving chip, and the electromagnetic valve driving circuit further comprises a power supply module for power supply.

[0010] Further, the driving chip is a TLE7242, and the micro processing chip is an E3640.

[0011] By the above technical scheme, the electromagnetic valve driving circuit has at least the following beneficial effects:

[0012] 1. The micro processing module, the driving module and the switch module are cooperatively matched, the vibration frequency and the road condition of the vehicle can be recognized during the driving of the vehicle, the electromagnetic valve is controlled according to the vibration frequency and the road condition, and the suspension hardness of the damping system is adjusted, so that the adaptability of the vehicle to the driving road surface and the driving comfort of the driver and the passenger are improved, the vehicle parts are reduced in loss and the service life of the vehicle parts is prolonged.

[0013] 2. The micro processing module, the driving module and the switch module have a simple structure and can flexibly adjust the suspension hardness of the vehicle, so that the vehicle can adapt to various road surfaces, the situation of complex modules and unstable circuit operation is avoided, the simplified driving circuit can efficiently complete the electromagnetic valve control function, and the stability of the internal circuit of the vehicle is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings, which are included to provide a further understanding of the application and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application. In the drawings:

[0015] Figure 1 Fig. 1 is a structural block diagram of the electromagnetic valve driving circuit of the present application;

[0016] Figure 2 Fig. 2 is a circuit diagram of the driving module of the present application;

[0017] Figure 3 Fig. 3 is a circuit diagram of the first electromagnetic valve module of the present application;

[0018] Figure 4Circuit diagram of the second electromagnetic valve module of the utility model;

[0019] Figure 5 Circuit diagram of the third electromagnetic valve module of the utility model;

[0020] Figure 6 Circuit diagram of the fourth electromagnetic valve module of the utility model;

[0021] Figure 7 Circuit diagram of the micro processing module of the utility model.

[0022] In the drawing: 1, micro processing module; 2, drive module; 3, switch module; 31, first electromagnetic valve module; 32, second electromagnetic valve module; 33, third electromagnetic valve module; 34, fourth electromagnetic valve module; 4, power module. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Due to the technical problem of fixed damping effect of the prior art causing discomfort of the driver and passenger and reducing the service life of the vehicle, please refer to Figure 1 Figure 7 ​The embodiment provides an electromagnetic valve driving circuit, which can greatly improve the driving comfort of the driver and passenger and effectively prolong the service life of the vehicle. The circuit comprises an electromagnetic valve driving circuit, which comprises a micro-processing module 1. The electromagnetic valve driving circuit further comprises a driving module 2 and a switching module 3 for actively controlling electromagnetic valves in the electromagnetic valve driving circuit. The driving module 2 comprises current limiting resistors R40, R41, R42 and R43 connected with an SCK interface, an SI interface, an SO interface and a CS_B interface of a driving chip respectively. The switching module 3 is connected with the driving chip through POS0, ENG0, OUT0, POS1, ENG1, OUT1, POS2, ENG2, OUT2, POS3, ENG3 and OUT3 interfaces of the driving chip. The switching module 3 comprises a first electromagnetic valve module 31, a second electromagnetic valve module 32, a third electromagnetic valve module 33 and a fourth electromagnetic valve module 34. The first electromagnetic valve module 31 comprises electromagnetic valve interfaces FR+ and FR-, a first MOS tube and a switching resistor R44. Signals of the driving chip pass through the first MOS tube and the sampling resistor R44, and then control the opening and closing actions of the electromagnetic valves through the electromagnetic valve interfaces FR+ and FR-. The second electromagnetic valve module 32 comprises electromagnetic valve interfaces FL+ and FL-, a second MOS tube and a switching resistor R47. The third electromagnetic valve module 33 comprises electromagnetic valve interfaces RR+ and RR-, a third MOS tube and a switching resistor R50. The fourth electromagnetic valve module 34 comprises electromagnetic valve interfaces RL+ and RL-, a fourth MOS tube and a switching resistor R53. The micro-processing module 1 comprises a micro-processing chip and an external power supply. The external power supply is connected with a VDD interface of the micro-processing chip. A GPIO_E2 interface of the micro-processing chip transmits driving signals to the driving chip. The electromagnetic valve driving circuit further comprises a power supply module 4 for power supply. The model of the driving chip is TLE7242, and the model of the micro-processing chip is E3640.

[0025] The micro processing module 1 adopts E3640-MCU which integrates rich communication peripheral modules, such as CAN-FD, LIN, FlexRay, USB and gigabit Ethernet TSN, can realize seamless system integration in the automobile system with high cost-effective system BOM cost, the built-in information security module integrates true random number generator, AES, RSA, ECC, SHA and hardware accelerator conforming to the national secret commercial secret 2 / 3 / 4 / 9 standards, the integration of these information security functions can meet the demand of security start, secure communication, secure firmware update and other applications, the product can meet the information security requirements of more than Full-EVITA level, the MCU collects wheel acceleration information, vehicle body acceleration information and vehicle CAN message information, processes the received data through an algorithm, controls the current of the shock absorber electromagnetic valve in real time, adjusts the shock absorber damping, and can obtain the vehicle running state and road information through the sensor, judges the vehicle running road surface, and then completes the adjustment of the suspension hardness, the driving chip of the driving module adopts the constant current special driving chip TLE7242, and the MOS tube of IPC100N04S5-1R7 is arranged to form a constant current circuit, the driving chip communicates with the MCU through the SPI interface, the MCU sends a constant current instruction to control the shock absorber electromagnetic valve through the SPI interface to realize constant current, reads the current information and fault diagnosis information in real time through the SPI interface, and meanwhile, four electromagnetic valve modules are matched to effectively control multiple electromagnetic valves to realize intelligent control, through the cooperation of the micro processing module, the driving module and the switching module, the vibration frequency and the road condition of the vehicle can be recognized during the vehicle running, the electromagnetic valve is controlled according to the vibration frequency and the road condition, and then the suspension hardness of the damping system is adjusted, the adaptability of the vehicle running road surface and the driving comfort of the driver and the passenger are improved, the vehicle parts are also reduced in loss and the service life of the vehicle parts is improved, through the simple structure of the micro processing module, the driving module and the switching module, the suspension hardness of the vehicle can be flexibly adjusted, the vehicle can adapt to various road conditions, the situation that the module is complex and the circuit operation is unstable is avoided, the simplified driving circuit can efficiently complete the electromagnetic valve control function, and the internal circuit stability of the vehicle is improved.

[0026] The control mode of the utility model is automatically controlled through the controller, the control circuit of the controller can be realized through simple programming of the person skilled in the art, the power supply also belongs to the public knowledge in the field, and the utility model is mainly used for protecting the mechanical device, therefore, the control mode and the circuit connection of the utility model will not be explained in detail.

[0027] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0028] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic valve drive circuit comprising a microprocessor module (1), characterized in that, The electromagnetic valve driving circuit further comprises a driving module (2) and a switching module (3) for actively controlling the electromagnetic valve in the electromagnetic valve driving circuit. The driving module (2) comprises current limiting resistors R40, R41, R42 and R43 connected with SCK interface, SI interface, SO interface and CS_B interface of the driving chip respectively, and the switching module (3) is connected with POS0 interface, ENG0 interface, OUT0 interface, POS1 interface, ENG1 interface, OUT1 interface, POS2 interface, ENG2 interface, OUT2 interface, POS3 interface, ENG3 interface and OUT3 interface of the driving chip.

2. The drive circuit according to claim 1, characterized in that, The switching module (3) comprises a first electromagnetic valve module (31), a second electromagnetic valve module (32), a third electromagnetic valve module (33) and a fourth electromagnetic valve module (34).

3. The drive circuit according to claim 2, characterized in that, The first electromagnetic valve module (31) comprises electromagnetic valve interfaces FR+ and FR-, a first MOS tube and a switching resistor R44, and the signal of the driving chip is transmitted through the first MOS tube and the sampling resistor R44, and then the opening and closing action of the electromagnetic valve is controlled through the electromagnetic valve interfaces FR+ and FR-.

4. The drive circuit according to claim 2, characterized by The second electromagnetic valve module (32) comprises electromagnetic valve interfaces FL+ and FL-, a second MOS tube and a switching resistor R47, the third electromagnetic valve module (33) comprises electromagnetic valve interfaces RR+ and RR-, a third MOS tube and a switching resistor R50, and the fourth electromagnetic valve module (34) comprises electromagnetic valve interfaces RL+ and RL-, a fourth MOS tube and a switching resistor R53.

5. The drive circuit according to claim 1, characterized by The micro processing module (1) comprises a micro processing chip and an external power supply, the external power supply is connected with the VDD interface of the micro processing chip, the GPIO_E2 interface of the micro processing chip transmits driving signals to the driving chip, and the electromagnetic valve driving circuit further comprises a power supply module (4) for power supply.

6. The drive circuit according to claim 5, characterized in that, The model of the driving chip is TLE7242, and the model of the micro processing chip is E3640.

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