Portable throttle valve test system

Abstract

The utility model relates to the field of automobile electric control, in particular to a portable throttle valve test system, which comprises an upper computer, an electronic throttle valve and a control system. The electronic throttle valve comprises a direct current motor and a position sensor; the control system comprises a microprocessor which is responsible for bus level conversion. The CAN communication module is used for realizing two-way communication between the processor and an upper computer; the control module is used for realizing positive and negative rotation and voltage control of the motor according to a control signal of the microprocessor; and the sensing signal processing module is used for conditioning an analog voltage signal of the position sensor into an analog signal matched with the A / D module of the processor. According to the portable throttle valve test system provided by the utility model, based on a traditional six-line detection method, the microcontroller is used to control and acquire different parameters of the throttle valve by using PWM signals through the control circuit, the microcontroller receives feedback signals, systematically analyzes the parameters, compares the parameters with qualified preset parameters of the throttle valve, and finally determines whether the throttle valve is qualified or not. And the fault reason of the throttle valve can be quickly identified.

Description

Technical Field

[0001] This utility model relates to the field of automotive electronic control, and specifically to a portable throttle valve testing system. Background Technology

[0002] With the rapid development of the automotive industry, automotive electronic control has become an important technological field. As people's demands for vehicle economy, power, safety, and handling stability increase, electronic control technology has become a crucial means for automakers to meet customer needs. The electronic throttle control system is an advanced technology applied to the electronic control of automotive engines. In gasoline and natural gas engines, the throttle, as a core component of the intake system, primarily controls the flow rate of air or air-fuel mixture into the engine, thus affecting relevant engine performance indicators. Over prolonged use, the throttle can experience issues such as position sensor signal drift, aging return springs, carbon buildup, and foreign object jamming. In these cases, the ECU can only detect the fault in the event of a serious malfunction. Minor faults or abnormalities, if not detected promptly, can further impact engine performance, such as insufficient power and increased fuel consumption. How to detect throttle abnormalities and malfunctions is a problem that 4S dealerships of various automakers must currently face. Traditional six-line testing methods are cumbersome, inefficient, and inconsistent. Furthermore, the technical parameters of throttles vary between different brands and models, leading to inconsistent testing standards and a high risk of misjudgment. Utility Model Content

[0003] To solve the above problems, this utility model provides a portable throttle valve testing system, characterized in that it includes a host computer, an electronic throttle valve, and a control system;

[0004] The electronic throttle includes a DC motor and a position sensor;

[0005] The control system includes a microprocessor, a CAN communication module responsible for bus level conversion and enabling bidirectional communication between the processor and the host computer, a control module that controls the forward and reverse rotation of the motor and voltage control based on the microprocessor control signals, and a sensor signal processing module that conditions the analog voltage signal from the position sensor into an analog signal that matches the processor's A / D module.

[0006] Furthermore, the host computer is a PC or an embedded device, which realizes bidirectional communication with the CAN communication module of the control system through a CAN bus analyzer.

[0007] Furthermore, the control module consists of two H-bridge drive circuits controlled by microcontroller PWM signals.

[0008] Furthermore, the H-bridge driving circuit includes a driving chip EG2104. The VCC terminal of the driving chip is connected to a 12V voltage and grounded through capacitor C10. The VCC terminal of the driving chip is also connected to the anode of diode D3. The cathode of diode D3 is connected to the driving VB terminal. The VB terminal of the driving chip is connected to a floating power supply. The floating power supply is connected to the VS terminal of the driving chip through capacitor C8. The VS terminal of the driving chip is connected to one end of resistor R5 and the cathode of diode D2. The other end of resistor R5 is connected to the anode of diode D2 and is connected to the VS terminal of driving chip VB through resistor R7. The VS terminal of driving chip VB is connected to the source of MOSFET Q5. The drain of MOSFET Q5 is connected to the power supply VCC, and the gate is connected to the anode of diode D2. The source of MOSFET Q5 is also connected to the drain of MOSFET Q6. The gate of MOSFET Q6 is connected to the LO terminal of the driving chip through resistor R9. The source of MOSFET Q6 is grounded and connected to the gate of MOSFET Q6 through resistor R11.

[0009] Furthermore, the IN terminal of the driver chip serves as the input terminal of the H-bridge driver circuit and is connected to the PMW1_1 terminal of the microcontroller; the SD terminal of the driver chip serves as the enable terminal of the H-bridge driver circuit and is connected to the SD1 terminal of the microcontroller; the VS terminal of the driver chip serves as the output terminal of the H-bridge driver circuit and is connected to port 1 of module JP1.

[0010] Furthermore, pins 5 and 6 of module JP1 are the voltage input points for the throttle sensor.

[0011] Furthermore, the MOS transistors Q3 and Q5 are N-MOS transistors.

[0012] In summary, this utility model has at least one of the following beneficial effects:

[0013] This invention provides a portable throttle valve testing system, including a host computer, a control system, and an electronic throttle valve to be tested. The control system includes a microcontroller, a CAN communication module, a control module, and a sensor signal processing module. This invention combines the traditional 6-wire detection method. The microcontroller uses PWM signals through the control circuit to control the forward, reverse, and rapid rotation of the throttle valve, as well as control the different angle positions of the blades. The microcontroller receives feedback signals and performs system analysis on these parameters, then compares them with the preset parameters of a qualified throttle valve, which can quickly identify the cause of throttle valve malfunctions. Attached Figure Description

[0014] Figure 1 This is a structural diagram of the module of this utility model;

[0015] Figure 2 This is the circuit diagram for the control module. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1-2 The present invention will be described in further detail below. Example 1:

[0017] This utility model provides a portable throttle body testing system, such as Figure 1 The system includes a host computer, an electronic throttle, and a control system. The host computer, acting as a PC or embedded device, communicates bidirectionally with the control system's CAN communication module via a CAN bus analyzer. The electronic throttle includes a DC motor and a position sensor. The motor is controlled by the control module of the control system, and based on signals from the microcontroller, it can control the throttle's forward, reverse, and rapid rotation, as well as the different angles of the throttle blades. Simultaneously, the position sensor transmits signals to the microcontroller for detection. The CAN communication module uses a bus design, sending processed data from the microcontroller to the host computer for visualization and simultaneously sending commands from the host computer to the microcontroller for parameter setting and other operations.

[0018] The control module circuit diagram is as follows: Figure 2 As shown, there are two H-bridge drive circuits controlled by microcontroller PWM signals. The output terminals are connected to the JP1 module, which is the terminal block for the electronic throttle. It connects to the six test lines of the electronic throttle. The port numbers and test line correspondences are as follows: 1. Motor negative terminal; 2. Motor positive terminal; 3. Position sensor ground; 4. Position sensor power supply; 5. Position sensor signal 1; 6. Position sensor signal 2. The throttle test system controls the throttle motor movement through ports 1 and 2, and obtains the throttle test result signals from ports 5 and 6.

[0019] Taking one of the circuits as an example, the IN terminal of the driver chip EG2104 is used as the input terminal of the H-bridge driver circuit and is connected to the PMW1_1 terminal of the microcontroller; the SD terminal of the driver chip is the enable terminal of the H-bridge driver circuit and is connected to the SD1 terminal of the microcontroller; the VS terminal of the driver chip is the output terminal of the H-bridge driver circuit and is connected to port 1 of module JP1.

[0020] In the circuit, the VCC terminal of the driver chip is connected to a 12V voltage and grounded through capacitor C10. The VCC terminal of the driver chip is also connected to the anode of diode D3. The cathode of diode D3 is connected to the VB terminal of the driver chip. The VB terminal of the driver chip is connected to a floating power supply. The floating power supply is connected to the VS terminal of the driver chip through capacitor C8. The VS terminal of the driver chip is connected to one end of resistor R5 and the cathode of diode D2. The other end of resistor R5 is connected to the anode of diode D2 and is connected to the VS terminal of the VB terminal of the driver chip through resistor R7. The VS terminal of the VB terminal of the driver chip is connected to the source of MOSFET Q5. The drain of MOSFET Q5 is connected to the power supply VCC, and the gate is connected to the anode of diode D2. The source of MOSFET Q5 is also connected to the drain of MOSFET Q6. The gate of MOSFET Q6 is connected to the LO terminal of the driver chip through resistor R9. The source of MOSFET Q6 is grounded and connected to the gate of MOSFET Q6 through resistor R11.

[0021] The sensor signal processing module filters the received throttle test result signal and transmits it to the microprocessor for signal analysis. Based on the type of PWM signal issued by the microprocessor, the throttle test result signal is compared with the corresponding qualified parameters to obtain the comparison result. The throttle test result signal and the comparison result are then sent to the host computer for visualization.

[0022] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A portable throttle body testing system, characterized in that: This includes the host computer, electronic throttle, and control system; The electronic throttle includes a DC motor and a position sensor; The control system includes a microprocessor, a CAN communication module responsible for bus level conversion and enabling bidirectional communication between the processor and the host computer, a control module that controls the forward and reverse rotation of the motor and voltage control based on the microprocessor control signals, and a sensor signal processing module that conditions the analog voltage signal from the position sensor into an analog signal that matches the processor's A / D module.

2. The portable throttle valve testing system according to claim 1, characterized in that: The host computer is a PC or an embedded device, which realizes bidirectional communication with the CAN communication module of the control system through a CAN bus analyzer.

3. The portable throttle valve testing system according to claim 1, characterized in that: The control module consists of two H-bridge drive circuits controlled by microcontroller PWM signals.

4. The portable throttle valve testing system according to claim 3, characterized in that: The H-bridge driving circuit includes a driver chip EG2104. The VCC terminal of the driver chip is connected to a 12V voltage and grounded through capacitor C10. The VCC terminal of the driver chip is also connected to the anode of diode D3. The cathode of diode D3 is connected to the driver VB terminal. The VB terminal of the driver chip is connected to a floating power supply. The floating power supply is connected to the VS terminal of the driver chip through capacitor C8. The VS terminal of the driver chip is connected to one end of resistor R5 and the cathode of diode D2. The other end of resistor R5 is connected to the anode of diode D2 and is connected to the VS terminal of driver VB through resistor R7. The VS terminal of driver VB is connected to the source of MOSFET Q5. The drain of MOSFET Q5 is connected to the power supply VCC, and the gate is connected to the anode of diode D2. The source of MOSFET Q5 is also connected to the drain of MOSFET Q6. The gate of MOSFET Q6 is connected to the LO terminal of the driver chip through resistor R9. The source of MOSFET Q6 is grounded and connected to the gate of MOSFET Q6 through resistor R11.

5. The portable throttle valve testing system according to claim 4, characterized in that: The IN terminal of the driver chip serves as the input terminal of the H-bridge driver circuit and is connected to the PMW1_1 terminal of the microcontroller; the SD terminal of the driver chip serves as the enable terminal of the H-bridge driver circuit and is connected to the SD1 terminal of the microcontroller; the VS terminal of the driver chip serves as the output terminal of the H-bridge driver circuit and is connected to port 1 of module JP1.

6. The portable throttle body testing system according to claim 4, characterized in that: Pins 5 and 6 of module JP1 are the voltage input points for the throttle sensor.

7. A portable throttle valve testing system according to any one of claims 4-6, characterized in that: The MOS transistors Q3 and Q5 are N-MOS transistors.

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