Engine multi-cylinder balance detection device

Abstract

An engine multi-cylinder balance detection device provided by the present invention comprises a hand-held machine shell, the top of the hand-held machine shell is provided with a plurality of air inlet pressure sensors, the front side of the hand-held machine shell is provided with a display screen, and the hand-held machine shell is internally provided with a main control MCU module. The main control MCU module is electrically connected with a pressure sampling module for collecting pressure data of an air inlet pressure sensor, the main control MCU module is electrically connected with a storage module, and the storage module stores an idle speed air inlet pressure standard reference database of a plurality of vehicle types; the pressure fluctuation value and the average value of the air inlet channel corresponding to each air cylinder are detected, calculated or displayed on a screen, according to a certain set strategy, a corresponding air channel flow adjusting method is displayed to an operator, real-time information is fed back to the screen, and a maintainer is guided to repair and maintain an engine to meet the requirement.

Description

Technical Field

[0001] The invention relates to the technical field of engine detection, in particular to an engine multi-cylinder balance detection device. Background Art

[0002] The multi-cylinder engine intake balance detection device detects the intake duct pressure fluctuation value and average value corresponding to each cylinder simultaneously through an electronic detection device. The existing electronic detection device refers to a multi-cylinder engine cylinder intake uniformity test device and test method with Chinese patent publication number CN117804779A, including an engine cylinder head, a cylinder head sealing gasket, an engine intake manifold, an engine intake manifold, a transparent cylinder sleeve cylinder head sealing gasket, a fixed stand, a speed regulating motor, a coupling, an engine exhaust manifold, an engine exhaust manifold, a vacuum Roots blower, a thermal flow meter, a pressure sensor, a data acquisition card, a lower control unit and an upper computer. The existing electronic detection device requires many components and has a large installation volume. It also requires upper and lower computers, and there are many wiring harnesses connected to each other, which leads to obstruction of on-site construction and detection operations, and brings many inconveniences to operators. Summary of the invention

[0003] The present invention solves the problem of inconvenient operation of existing engine multi-cylinder balance detection, and proposes an engine multi-cylinder balance detection device, which detects the intake duct pressure fluctuation value and average value corresponding to each cylinder, and calculates or displays them on the screen, and shows the corresponding air duct flow adjustment method to the operator according to a certain setting strategy, feeds back real-time information to the screen, and guides the maintenance personnel to meet the requirements for engine maintenance.

[0004] In order to achieve the above objectives, the following technical solutions are proposed: An engine multi-cylinder balance detection device comprises a handheld housing, a plurality of intake pressure sensors are arranged on the top of the handheld housing, a display screen is arranged on the front of the handheld housing, a main control MCU module is built in the handheld housing, the main control MCU module is electrically connected to a pressure sampling module for collecting pressure data of the intake pressure sensors, and the main control MCU module is electrically connected to a storage module, and the storage module stores a standard reference database of idle intake pressures of a plurality of vehicle models.

[0005] The present invention uses an electronic detection device to simultaneously detect the intake duct pressure fluctuation value corresponding to each cylinder, the average value, and displays it on the screen through calculation. According to a certain setting strategy, the corresponding air duct flow adjustment method is displayed to the operator, and real-time information is fed back to the screen to guide the maintenance personnel to meet the requirements for engine maintenance.

[0006] Preferably, a protection circuit is connected between the pressure sampling module and the main control MCU module.

[0007] A protection circuit is connected between the main control MCU module and the pressure sampling module. The pressure sampling module collects the analog signal of the intake pressure sensor, and an instantaneous high-voltage signal may appear. The protection circuit is used to prevent the instantaneous high-voltage signal collected by the pressure sampling module from causing damage to the main control MCU module.

[0008] Preferably, a plurality of function keys are provided on the front of the handheld housing, and the main control MCU module is electrically connected to a key operation processing module connected to the function keys.

[0009] The present invention provides a plurality of function keys for controlling the main control MUC module to perform related operations on the front of the handheld housing, and the main control MCU module is electrically connected to a key operation processing module. The key operation processing module is connected to the function keys, receives the input model of the function keys, generates corresponding execution signals to the main control MCU module, and the related operations include querying data, updating data, storing data, selecting data, etc.

[0010] Preferably, the display screen is an LCD screen or a TFT screen.

[0011] Preferably, the handheld housing is provided with a plurality of indicator lights, which are electrically connected to the main control MCU module.

[0012] The main control MCU module of the present invention is electrically connected to a plurality of indicator lights, which are arranged on the front of the handheld housing, especially on the side of the display screen. The indicator lights can be used as a power shortage reminder, a normal or abnormal intake pressure reminder, etc., and can be set to flash or always on according to needs, and different colors correspond to different working conditions, etc.

[0013] Preferably, a power input interface is provided on the side of the handheld housing, and the main control MCU module is electrically connected to a lithium battery connected to the power input interface, and the lithium battery supplies power to the main control MCU module and the display screen.

[0014] The handheld housing of the present invention is equipped with a lithium battery for powering the main control MCU module and the display screen, and can realize offline operation after charging. The lithium battery is electrically connected to a power input interface, and the power input interface is arranged on the side of the handheld housing.

[0015] Preferably, the lithium battery is electrically connected to a power processing module, and the power processing module is respectively connected to a screen driver of the display screen and a main control MCU module for power supply, and the main control MCU module is electrically connected to the screen driver.

[0016] The lithium battery of the present invention is electrically connected to a power processing module for power voltage division, the power processing module is connected to the screen driver of the display screen for power supply, the power processing module is connected to the main control MCU module of the display screen for power supply, the screen driver is electrically connected to the main control MCU module, and the main control MCU module transmits the data to be displayed to the screen driver. The power processing module divides the output voltage of the lithium battery according to the working voltage of the main control MCU module and the working voltage of the screen driver, so that the main control MCU module and the screen driver operate normally.

[0017] Preferably, a charging management and protection circuit is connected between the lithium battery and the power input interface.

[0018] A charging management and protection circuit is connected between the power input interface of the present invention and the lithium battery. The charging management and protection circuit is used to prevent the lithium battery from being overcharged and to avoid the situation where the lithium battery is damaged by excessive instantaneous current during charging.

[0019] Preferably, the storage module includes an EEPROM memory and a FLASH memory, the idle intake pressure standard reference database of the several vehicle models is stored in the EEPROM memory, and the FLASH memory stores the engine operating data and the data collected by the pressure sampling module.

[0020] The storage module of the present invention comprises a FLASH memory and an EEPROM memory, wherein the FLASH memory is used to store engine operation data and data collected by a pressure sampling module, and the EEPROM memory is used to store a standard reference database of idle intake pressures of several vehicle models.

[0021] Preferably, a CAN data transmission interface and a USB data transmission interface are provided on the side of the handheld housing, and the main control MCU module is electrically connected to a CANBUS communication module connected to the CAN data transmission interface and a USB communication module connected to the USB data transmission interface.

[0022] The side of the handheld housing of the present invention is provided with a CAN data transmission interface and a USB data transmission interface, the CAN data transmission interface is electrically connected to the CANBUS communication module, the USB data transmission interface is electrically connected to the USB communication module, the CANBUS communication module and the USB communication module are electrically connected to the main control MCU module, and the USB communication module is used to exchange data with external computer equipment, such as uploading and updating the idle intake pressure standard reference database of several vehicle models. The CANBUS communication module is used to monitor the data of the engine ECU control unit in real time and obtain the engine operation data.

[0023] The beneficial effects of the present invention are: the present invention has a smaller size and is convenient for on-site installation; a single person can operate it by hand; the curve, data, and fluctuation state of the present invention are displayed in real time; the engine data stored in the built-in EEPROM of the present invention can be upgraded at any time; the CANBUS communication of the present invention can monitor the data of the engine ECU control unit in real time; the FLASH of the present invention can store the engine working and collected data. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the device structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the internal module connection of the present invention.

[0026] Among them: 1. Handheld housing; 2. Intake pressure sensor; 3. CAN data transmission interface; 4. USB data transmission interface; 5. Display screen; 6. Power input interface; 7. Function buttons; 8. Indicator light. DETAILED DESCRIPTION

[0027] Embodiment 1: This embodiment proposes an engine multi-cylinder balance detection device, referring to Figure 1 and Figure 2 , including a handheld housing 1 and a 4-way intake pressure sensor 2, the intake pressure sensor 2 is connected to the engine intake duct through a sampling pipeline to obtain an analog signal. The 4-way intake pressure sensor 2 is arranged on the top of the handheld housing 1, and the handheld housing 1 is built with a main control MCU module. In this embodiment, a single-chip microcomputer is used as the main control MCU module. The main control MCU module is electrically connected to a pressure sampling module, and the pressure sampling module is used to collect the analog signal of the pressure data obtained by the intake pressure sensor 2 to the main control MCU module. A protection circuit is connected between the main control MCU module and the pressure sampling module. When the pressure sampling module collects the analog signal of the intake pressure sensor 2, an instantaneous high-voltage signal may appear. The protection circuit is used to prevent the instantaneous high-voltage signal collected by the pressure sampling module from causing damage to the main control MCU module.

[0028] The main control MCU module is electrically connected to a storage module storing a standard reference database of idle intake pressure of several vehicle models. The handheld housing 1 is provided with a display screen 5, which is a TFT screen or an LCD screen. The display screen 5 is arranged on the front of the handheld housing 1. The main control MCU module collects, calculates and analyzes the real-time intake pressure value P pressure waveform and displays it on the display screen 5 in real time, and outputs the fluctuation value δP of the intake volume of each cylinder, the multi-cylinder average pressure value Pv, and the difference Δ between the intake pressure value of each cylinder and the multi-cylinder average intake pressure. The operator adjusts the idle intake flow screw according to the standard reference database of idle intake pressure of several vehicle models and maintenance requirements, so that the idle intake pressure waveform and data are adjusted to the target value; ensure that the pressure fluctuation value between cylinders is controlled within ΔP<1.5kpa. Under load conditions, according to the difference in intake pressure data of each cylinder, adjust the load screw to adjust the intake pressure waveform and data to the target value; ensure that the pressure fluctuation value between cylinders is controlled within ΔP<1.5kpa.

[0029] This device calculates the actual pressure value of each cylinder through electronic acquisition control, obtains the actual value and difference through calculation and analysis, and draws it into an image; the present invention uses an electronic detection device to simultaneously detect the intake pressure fluctuation value and average value corresponding to each cylinder, and displays it on the screen through calculation, and according to a certain setting strategy, displays the corresponding airway flow adjustment method to the operator, and feeds back real-time information to the screen to guide the maintenance personnel to meet the requirements for engine maintenance. The present invention analyzes data in real time through electronic control acquisition, has a small size, is easy to install on site, and can be operated by one person; basic data of different engines can be imported as the basis for analysis.

[0030] The storage module of the present invention comprises a FLASH memory and an EEPROM memory, wherein the FLASH memory is used to store engine operation data and data collected by a pressure sampling module, and the EEPROM memory is used to store a standard reference database of idle intake pressures of several vehicle models.

[0031] The side of the handheld housing 1 of the present invention is provided with a CAN data transmission interface 3 and a USB data transmission interface 4, the CAN data transmission interface 3 is electrically connected to the CANBUS communication module, the USB data transmission interface 4 is electrically connected to the USB communication module, the CANBUS communication module and the USB communication module are electrically connected to the main control MCU module, and the USB communication module is used to exchange data with external computer equipment, such as uploading and updating the idle intake pressure standard reference database of several vehicle models. The CANBUS communication module is used to monitor the data of the engine ECU control unit in real time and obtain the engine operation data. This device can be connected to the CANBUS network of the vehicle, and can read the speed n, throttle opening TPS, airway pressure MAP, engine temperature ET and other data of the ECU unit in real time and display them on the screen in real time for the operator to analyze.

[0032] Embodiment 2: This embodiment optimizes the power supply of the device on the basis of embodiment 1, and proposes an engine multi-cylinder balance detection device. Figure 1 and Figure 2 , including a handheld housing 1 and a 4-way intake pressure sensor 2, the intake pressure sensor 2 is connected to the engine intake duct through a sampling pipeline to obtain an analog signal. The 4-way intake pressure sensor 2 is arranged on the top of the handheld housing 1, and the handheld housing 1 is built with a main control MCU module. In this embodiment, a single-chip microcomputer is used as the main control MCU module. The main control MCU module is electrically connected to a pressure sampling module, and the pressure sampling module is used to collect the analog signal of the pressure data obtained by the intake pressure sensor 2 to the main control MCU module. A protection circuit is connected between the main control MCU module and the pressure sampling module. When the pressure sampling module collects the analog signal of the intake pressure sensor 2, an instantaneous high-voltage signal may appear. The protection circuit is used to prevent the instantaneous high-voltage signal collected by the pressure sampling module from causing damage to the main control MCU module.

[0033] The main control MCU module is electrically connected to a storage module storing a standard reference database of idle intake pressure of several vehicle models. The handheld housing 1 is provided with a display screen 5, which is a TFT screen or an LCD screen. The display screen 5 is arranged on the front of the handheld housing 1. The main control MCU module collects, calculates and analyzes the real-time intake pressure value P pressure waveform and displays it on the display screen 5 in real time, and outputs the fluctuation value δP of the intake volume of each cylinder, the multi-cylinder average pressure value Pv, and the difference Δ between the intake pressure value of each cylinder and the multi-cylinder average intake pressure. The operator adjusts the idle intake flow screw according to the standard reference database of idle intake pressure of several vehicle models and maintenance requirements, so that the idle intake pressure waveform and data are adjusted to the target value; ensure that the pressure fluctuation value between cylinders is controlled within ΔP<1.5kpa. Under load conditions, according to the difference in intake pressure data of each cylinder, adjust the load screw to adjust the intake pressure waveform and data to the target value; ensure that the pressure fluctuation value between cylinders is controlled within ΔP<1.5kpa.

[0034] This device calculates the actual pressure value of each cylinder through electronic acquisition control, obtains the actual value and difference through calculation and analysis, and draws it into an image; the present invention uses an electronic detection device to simultaneously detect the intake pressure fluctuation value and average value corresponding to each cylinder, and displays it on the screen through calculation, and according to a certain setting strategy, displays the corresponding airway flow adjustment method to the operator, and feeds back real-time information to the screen to guide the maintenance personnel to meet the requirements for engine maintenance. The present invention analyzes data in real time through electronic control acquisition, has a small size, is easy to install on site, and can be operated by one person; basic data of different engines can be imported as the basis for analysis.

[0035] The storage module of the present invention comprises a FLASH memory and an EEPROM memory, wherein the FLASH memory is used to store engine operation data and data collected by a pressure sampling module, and the EEPROM memory is used to store a standard reference database of idle intake pressures of several vehicle models.

[0036] The side of the handheld housing 1 of the present invention is provided with a CAN data transmission interface 3 and a USB data transmission interface 4, the CAN data transmission interface 3 is electrically connected to the CANBUS communication module, the USB data transmission interface 4 is electrically connected to the USB communication module, the CANBUS communication module and the USB communication module are electrically connected to the main control MCU module, and the USB communication module is used to exchange data with external computer equipment, such as uploading and updating the idle intake pressure standard reference database of several vehicle models. The CANBUS communication module is used to monitor the data of the engine ECU control unit in real time and obtain the engine operation data. This device can be connected to the CANBUS network of the vehicle, and can read the speed n, throttle opening TPS, airway pressure MAP, engine temperature ET and other data of the ECU unit in real time and display them on the screen in real time for the operator to analyze.

[0037] The handheld housing 1 of the present invention has a built-in lithium battery for powering the main control MCU module and the display screen 5, and can achieve offline operation after charging. The lithium battery is electrically connected to a power input interface 6, and the power input interface 6 is arranged on the side of the handheld housing 1.

[0038] The lithium battery of the present invention is electrically connected to a power processing module for power voltage division, the power processing module is connected to the screen driver of the display screen 5 for power supply, the power processing module is connected to the main control MCU module of the display screen 5 for power supply, the screen driver is electrically connected to the main control MCU module, and the main control MCU module transmits the data to be displayed to the screen driver. The power processing module divides the output voltage of the lithium battery according to the working voltage of the main control MCU module and the working voltage of the screen driver, so that the main control MCU module and the screen driver operate normally.

[0039] A charging management and protection circuit is connected between the power input interface 6 of the present invention and the lithium battery. The charging management and protection circuit is used to prevent the lithium battery from being overcharged and to avoid the situation where the lithium battery is damaged by excessive instantaneous current during charging.

[0040] Embodiment 3: This embodiment optimizes the device control data input based on the embodiment 2, and proposes an engine multi-cylinder balance detection device. Figure 1 and Figure 2, including a handheld housing 1 and a 4-way intake pressure sensor 2, the intake pressure sensor 2 is connected to the engine intake duct through a sampling pipeline to obtain an analog signal. The 4-way intake pressure sensor 2 is arranged on the top of the handheld housing 1, and the handheld housing 1 is built with a main control MCU module. In this embodiment, a single-chip microcomputer is used as the main control MCU module. The main control MCU module is electrically connected to a pressure sampling module, and the pressure sampling module is used to collect the analog signal of the pressure data obtained by the intake pressure sensor 2 to the main control MCU module. A protection circuit is connected between the main control MCU module and the pressure sampling module. When the pressure sampling module collects the analog signal of the intake pressure sensor 2, an instantaneous high-voltage signal may appear. The protection circuit is used to prevent the instantaneous high-voltage signal collected by the pressure sampling module from causing damage to the main control MCU module.

[0041] The present invention provides a plurality of function keys 7 for controlling the main control MUC module to perform related operations on the front of the handheld housing 1, and the main control MCU module is electrically connected to a key operation processing module. The key operation processing module is connected to the function key 7, receives the input model of the function key 7, generates a corresponding execution signal to the main control MCU module, and the related operations include querying data, updating data, storing data, selecting data, etc.

[0042] The main control MCU module is electrically connected to a storage module storing a standard reference database of idle intake pressure of several vehicle models. The handheld housing 1 is provided with a display screen 5, which is a TFT screen or an LCD screen. The display screen 5 is arranged on the front of the handheld housing 1. The main control MCU module collects, calculates and analyzes the real-time intake pressure value P pressure waveform and displays it on the display screen 5 in real time, and outputs the fluctuation value δP of the intake volume of each cylinder, the multi-cylinder average pressure value Pv, and the difference Δ between the intake pressure value of each cylinder and the multi-cylinder average intake pressure. The operator adjusts the idle intake flow screw according to the standard reference database of idle intake pressure of several vehicle models and maintenance requirements, so that the idle intake pressure waveform and data are adjusted to the target value; ensure that the pressure fluctuation value between cylinders is controlled within ΔP<1.5kpa. Under load conditions, according to the difference in intake pressure data of each cylinder, adjust the load screw to adjust the intake pressure waveform and data to the target value; ensure that the pressure fluctuation value between cylinders is controlled within ΔP<1.5kpa.

[0043] This device calculates the actual pressure value of each cylinder through electronic acquisition control, obtains the actual value and difference through calculation and analysis, and draws it into an image; the present invention uses an electronic detection device to simultaneously detect the intake pressure fluctuation value and average value corresponding to each cylinder, and displays it on the screen through calculation, and according to a certain setting strategy, displays the corresponding airway flow adjustment method to the operator, and feeds back real-time information to the screen to guide the maintenance personnel to meet the requirements for engine maintenance. The present invention analyzes data in real time through electronic control acquisition, has a small size, is easy to install on site, and can be operated by one person; basic data of different engines can be imported as the basis for analysis.

[0044] The storage module of the present invention comprises a FLASH memory and an EEPROM memory, wherein the FLASH memory is used to store engine operation data and data collected by a pressure sampling module, and the EEPROM memory is used to store a standard reference database of idle intake pressures of several vehicle models.

[0045] The side of the handheld housing 1 of the present invention is provided with a CAN data transmission interface 3 and a USB data transmission interface 4, the CAN data transmission interface 3 is electrically connected to the CANBUS communication module, the USB data transmission interface 4 is electrically connected to the USB communication module, the CANBUS communication module and the USB communication module are electrically connected to the main control MCU module, and the USB communication module is used to exchange data with external computer equipment, such as uploading and updating the idle intake pressure standard reference database of several vehicle models. The CANBUS communication module is used to monitor the data of the engine ECU control unit in real time and obtain the engine operation data. This device can be connected to the CANBUS network of the vehicle, and can read the speed n, throttle opening TPS, airway pressure MAP, engine temperature ET and other data of the ECU unit in real time and display them on the screen in real time for the operator to analyze.

[0046] The handheld housing 1 of the present invention has a built-in lithium battery for powering the main control MCU module and the display screen 5, and can achieve offline operation after charging. The lithium battery is electrically connected to a power input interface 6, and the power input interface 6 is arranged on the side of the handheld housing 1.

[0047] The lithium battery of the present invention is electrically connected to a power processing module for power voltage division, the power processing module is connected to the screen driver of the display screen 5 for power supply, the power processing module is connected to the main control MCU module of the display screen 5 for power supply, the screen driver is electrically connected to the main control MCU module, and the main control MCU module transmits the data to be displayed to the screen driver. The power processing module divides the output voltage of the lithium battery according to the working voltage of the main control MCU module and the working voltage of the screen driver, so that the main control MCU module and the screen driver operate normally.

[0048] A charging management and protection circuit is connected between the power input interface 6 of the present invention and the lithium battery. The charging management and protection circuit is used to prevent the lithium battery from being overcharged and to avoid the situation where the lithium battery is damaged by excessive instantaneous current during charging.

[0049] Embodiment 4: This embodiment optimizes the device status display based on the embodiment 3, and proposes an engine multi-cylinder balance detection device. Figure 1 and Figure 2 , including a handheld housing 1 and a 4-way intake pressure sensor 2, the intake pressure sensor 2 is connected to the engine intake duct through a sampling pipeline to obtain an analog signal. The 4-way intake pressure sensor 2 is arranged on the top of the handheld housing 1, and the handheld housing 1 is built with a main control MCU module. In this embodiment, a single-chip microcomputer is used as the main control MCU module. The main control MCU module is electrically connected to a pressure sampling module, and the pressure sampling module is used to collect the analog signal of the pressure data obtained by the intake pressure sensor 2 to the main control MCU module. A protection circuit is connected between the main control MCU module and the pressure sampling module. When the pressure sampling module collects the analog signal of the intake pressure sensor 2, an instantaneous high-voltage signal may appear. The protection circuit is used to prevent the instantaneous high-voltage signal collected by the pressure sampling module from causing damage to the main control MCU module.

[0050] The present invention provides a plurality of function keys 7 for controlling the main control MUC module to perform related operations on the front of the handheld housing 1, and the main control MCU module is electrically connected to a key operation processing module. The key operation processing module is connected to the function key 7, receives the input model of the function key 7, generates a corresponding execution signal to the main control MCU module, and the related operations include querying data, updating data, storing data, selecting data, etc.

[0051] The main control MCU module of the present invention is electrically connected to a plurality of indicator lights 8, which are arranged on the front of the handheld housing 1, especially on the side of the display screen 5. The indicator lights 8 can be used as a power shortage reminder, a normal or abnormal intake pressure reminder, etc., and can be set to flash or always on according to needs, and different colors correspond to different working conditions, etc.

[0052] The main control MCU module is electrically connected to a storage module storing a standard reference database of idle intake pressure of several vehicle models. The handheld housing 1 is provided with a display screen 5, which is a TFT screen or an LCD screen. The display screen 5 is arranged on the front of the handheld housing 1. The main control MCU module collects, calculates and analyzes the real-time intake pressure value P pressure waveform and displays it on the display screen 5 in real time, and outputs the fluctuation value δP of the intake volume of each cylinder, the multi-cylinder average pressure value Pv, and the difference Δ between the intake pressure value of each cylinder and the multi-cylinder average intake pressure. The operator adjusts the idle intake flow screw according to the standard reference database of idle intake pressure of several vehicle models and maintenance requirements, so that the idle intake pressure waveform and data are adjusted to the target value; ensure that the pressure fluctuation value between cylinders is controlled within ΔP<1.5kpa. Under load conditions, according to the difference in intake pressure data of each cylinder, adjust the load screw to adjust the intake pressure waveform and data to the target value; ensure that the pressure fluctuation value between cylinders is controlled within ΔP<1.5kpa.

[0053] This device calculates the actual pressure value of each cylinder through electronic acquisition control, obtains the actual value and difference through calculation and analysis, and draws it into an image; the present invention uses an electronic detection device to simultaneously detect the intake pressure fluctuation value and average value corresponding to each cylinder, and displays it on the screen through calculation, and according to a certain setting strategy, displays the corresponding airway flow adjustment method to the operator, and feeds back real-time information to the screen to guide the maintenance personnel to meet the requirements for engine maintenance. The present invention analyzes data in real time through electronic control acquisition, has a small size, is easy to install on site, and can be operated by one person; basic data of different engines can be imported as the basis for analysis.

[0054] The storage module of the present invention comprises a FLASH memory and an EEPROM memory, wherein the FLASH memory is used to store engine operation data and data collected by a pressure sampling module, and the EEPROM memory is used to store a standard reference database of idle intake pressures of several vehicle models.

[0055] The side of the handheld housing 1 of the present invention is provided with a CAN data transmission interface 3 and a USB data transmission interface 4, the CAN data transmission interface 3 is electrically connected to the CANBUS communication module, the USB data transmission interface 4 is electrically connected to the USB communication module, the CANBUS communication module and the USB communication module are electrically connected to the main control MCU module, and the USB communication module is used to exchange data with external computer equipment, such as uploading and updating the idle intake pressure standard reference database of several vehicle models. The CANBUS communication module is used to monitor the data of the engine ECU control unit in real time and obtain the engine operation data. This device can be connected to the CANBUS network of the vehicle, and can read the speed n, throttle opening TPS, airway pressure MAP, engine temperature ET and other data of the ECU unit in real time and display them on the screen in real time for the operator to analyze.

[0056] The handheld housing 1 of the present invention has a built-in lithium battery for powering the main control MCU module and the display screen 5, and can achieve offline operation after charging. The lithium battery is electrically connected to a power input interface 6, and the power input interface 6 is arranged on the side of the handheld housing 1.

[0057] The lithium battery of the present invention is electrically connected to a power processing module for power voltage division, the power processing module is connected to the screen driver of the display screen 5 for power supply, the power processing module is connected to the main control MCU module of the display screen 5 for power supply, the screen driver is electrically connected to the main control MCU module, and the main control MCU module transmits the data to be displayed to the screen driver. The power processing module divides the output voltage of the lithium battery according to the working voltage of the main control MCU module and the working voltage of the screen driver, so that the main control MCU module and the screen driver operate normally.

[0058] A charging management and protection circuit is connected between the power input interface 6 of the present invention and the lithium battery. The charging management and protection circuit is used to prevent the lithium battery from being overcharged and to avoid the situation where the lithium battery is damaged by excessive instantaneous current during charging.

Claims

1. An engine multi-cylinder balance detection device, characterized in that: The invention comprises a handheld housing (1), wherein a plurality of intake pressure sensors (2) are arranged on the top of the handheld housing (1), a display screen (5) is arranged on the front of the handheld housing (1), a main control MCU module is built in the handheld housing (1), the main control MCU module is electrically connected to a pressure sampling module for collecting pressure data of the intake pressure sensors (2), and the main control MCU module is electrically connected to a storage module, and the storage module stores a standard reference database of idle intake pressures of a plurality of vehicle models.

2. The engine multi-cylinder balance detection device according to claim 1, characterized in that: A protection circuit is connected between the pressure sampling module and the main control MCU module.

3. The engine multi-cylinder balance detection device according to claim 1, characterized in that: The front of the handheld housing (1) is provided with a plurality of function keys (7), and the main control MCU module is electrically connected to a key operation processing module connected to the function keys (7).

4. The engine multi-cylinder balance detection device according to claim 1, characterized in that: The display screen (5) is an LCD screen or a TFT screen.

5. The engine multi-cylinder balance detection device according to claim 1, characterized in that: The handheld housing (1) is provided with a plurality of indicator lights (8), and the indicator lights (8) are electrically connected to a main control MCU module.

6. The engine multi-cylinder balance detection device according to claim 1, characterized in that: A power input interface (6) is provided on the side of the handheld housing (1); the main control MCU module is electrically connected to a lithium battery connected to the power input interface (6); the lithium battery supplies power to the main control MCU module and the display screen (5).

7. The engine multi-cylinder balance detection device according to claim 6, characterized in that: The lithium battery is electrically connected to a power processing module, and the power processing module is respectively connected to the screen driver of the display screen (5) and the main control MCU module for power supply, and the main control MCU module is electrically connected to the screen driver.

8. The engine multi-cylinder balance detection device according to claim 6, characterized in that: A charging management and protection circuit is connected between the lithium battery and the power input interface (6).

9. An engine multi-cylinder balance detection device according to any one of claims 1 to 8, characterized in that: The storage module includes an EEPROM memory and a FLASH memory. The idle intake pressure standard reference database of the several vehicle models is stored in the EEPROM memory. The FLASH memory stores engine operation data and data collected by the pressure sampling module.

10. The engine multi-cylinder balance detection device according to claim 9, characterized in that: A CAN data transmission interface (3) and a USB data transmission interface (4) are provided on the side of the handheld housing (1); the main control MCU module is electrically connected to a CANBUS communication module connected to the CAN data transmission interface (3) and a USB communication module connected to the USB data transmission interface (4).

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