RU2599879C2 - Gasoline supply system monitor and method of fuel supply system diagnostics on moving vehicle - Google Patents

Abstract

FIELD: fuel.

SUBSTANCE: invention relates to automobile fuel supply system diagnostic devices. Proposed fuel supply system monitor (FSSM) and implemented by it diagnostic technique are intended for safe, fast and reliable diagnostics of fuel supply system (FSS) in moving vehicle, equipped with fuel injection equipment into ICE intake manifold. FSSM contains having software laptop 2 and parameters measuring unit 1, which is connected to FSS and ICE inlet circuit outside of car cabin, wherefrom it transmits via Bluetooth radio link to arranged in cabin notebook information on gasoline supply system parameters. This information is recorded automatically in notebook and displayed on screen in form of oscillograms and digital values, as by which FSS state is monitored in real time, and with car jerks and shaking time markers are made.

EFFECT: recorded data is reproduced, analyzed and the FSS technical diagnosis us determined.

2 cl, 29 dwg

Description

The monitor of the gasoline supply system (ISBM) and the method for diagnosing the gasoline supply system implemented according to it in accordance with the current heading of the International Patent Classification (IPC) belong to class F02M 65/00 - testing fuel-spraying equipment for the supply of combustible mixtures or their components to internal combustion engines (ICE) .

FIELD OF THE INVENTION

The invention relates to the field of testing gasoline supply system (SPB) to the nozzles of vehicles equipped with gasoline injection equipment (ABB) in the intake manifold of the internal combustion engine. Such cars are currently the most common, and their SPB during operation are continuously subjected to intense wear and tear and impairment of performance from impurities, pollution and low-quality gasoline. This directly negatively affects the functioning of the nozzles and ICE, therefore the issues of improving the means and methods of diagnosing SPB are very relevant.

State of the art

The current analogues of MSBE and methods for diagnosing STB are widely described by car manufacturers and publishers of car repair and information databases such as Autodata Ltd [Autodata 3.38. Section “Checking engine control components. System checks and regulations. The pressure of gasoline in the system, the retention of pressure of gasoline. " Citroen C1 1.0 2005-2011, engine code 384F (CFA) / 1KR-FE. Hyundai 10 1.1 2008-2011, engine code G4HG. Kia Picanto 1.0 2004-2011, engine code G4HE. Audi A3 (03-) 1.6 2005-2011, engine code BSE. Honda CR-V (07-) 2.0 2007-2011, engine code R20A2. Opel / Vauxhall Astra - N 2.2 2006-2011, engine code Z22YH, and other cars. Electronic version. Autodata Ltd, UK, 2012, http://uk.autodata-group.com/], in technical bulletins [Geely MK, chapter 3, section 1], repair literature [BMW X5 (E53) from 1998 to 2006 of release . Construction, maintenance, repair. Section “Checking the fuel pressure”, p. 78-79. Arus Publishing House, 2013], [Lada Priora. Repair without problems. Section 5 “Engine. Supply system. Checking the pressure in the engine power system. " Electronic version. Publishing house "Third Rome", M., 2007], [K.V. Sidorov et al. Geely MK since 2006, MK Cross since 2011. Operation, maintenance and repair manual. Section "Checking the Pressure in the Engine Power System", p. 98. The publishing house "Third Rome", M., 2012], etc.

From the sources of information it follows that the analogs of MSBE are practically identical in terms of device and method of use, simple and affordable. At the same time, the complete lack of automation is their significant drawback, since it allows you to safely perform only limited diagnostic procedures only manually and only on a stationary car, which very often makes diagnostics extremely inefficient, and the required technical result is a quick and reliable technical diagnosis (GOST 20911 -89. Technical diagnostics. Terms and definitions, table 1, p. 9) SPB and localization of the defect - unattainable.

So, in various ABB systems, including SPB, defects often arise that affect the operation of the internal combustion engine only when the car moves, as a result of which the internal combustion engine periodically loses power, and then the car moves jerkily, twitches. But when working on site or on a load bench, the internal combustion engine is functioning correctly, the diagnostic parameters are within tolerances, so the defect does not manifest itself, and this makes it very difficult to find, recognize and localize it. Diagnostic trouble codes for the SPB as a whole or its components are not provided for by current standards, and even if the “check engine” panel lights up on the vehicle’s instrument cluster, then the fixed codes usually indicate a lambda probe or another component of the ABB and thereby enter the diagnostician is misleading. All these circumstances require either the diagnosis of SPB during the movement of the car in order to fix the values of the parameters precisely at the moment of manifestation of the defect, or insufficiently justified dismantling / installation of SPB components (for example, a fuel tank), i.e. considerable labor costs that can end to no avail. Diagnostics when simulating motion by rocking the car also does not give a result.

To guarantee a technical result, diagnostics are required during the movement of the car. For this, first of all, it is necessary to ensure the environmental and fire safety of people (the driver and the diagnostician) and the car, and then in real time continuously and simultaneously determine and fix the values of the three SPB parameters (gas pressure in the ramp, gas flow rate, vacuum in the intake tract ICE), calculate the values of the fourth parameter (pressure at the nozzles) and correlate all the values for each moment of jerking and twitching of the car.

The analogs partially coincide with the ISMB in some essential respects: their device includes measuring instruments for pressure and gas supply, air dilution, and the diagnostic method consists in the actions of a diagnostician to monitor the readings of all devices and fix them at the moments of jerking and twitching of the car.

However, the technical result is unattainable by analogues. The reasons for this is that for diagnostics by analogs in motion, it is necessary for the diagnostician to bring petrol under pressure from the supply line of SPB gasoline (from under the hood or bottom) in long hoses, a pressure gauge and a rotameter, as well as a vacuum from the engine's intake tract to hose and vacuum gauge, and this is often impossible to do safely for movement. But even if this succeeds, it is impossible to manually simultaneously and accurately record the readings of all the instruments at the moments of jerking / twitching of the car due to the different inertia of the instruments and the long reaction time of the diagnostician, moreover, jerking / twitching may depend not on the defect, but on the actions of the driver; all this misleads the diagnostician and makes the technical diagnosis impossible or insufficiently reliable. In this case, there is always a danger of gasoline damaging the airways and the skin of the driver and the diagnostician, ruining the interior or causing a car fire.

Unlike analogues, MSBP ensures the achievement of a technical result. ISMB is not known from the prior art, it does not follow from the prior art for a specialist and can be applied in the automotive service industry. By virtue of this, ISMB is a new, industrially applicable invention having an inventive step.

Disclosure of invention

The essence of ISBM as a technical solution lies in the combination of the properties of its device and the method for diagnosing it that is implemented by it, which ensures the achievement of a technical result.

The MSBE device includes two main structural elements: a parameter measurement unit (BIP) and a laptop with the Windows XP operating system, as well as software (software), which, in turn, includes BIP software and laptop software.

BIP 1 is connected to the gas supply line and the engine's air intake duct under the hood or elsewhere in the car outside its cabin, and laptop 2 is located in the cabin (Fig. 1); communication between them is carried out via a digital radio channel Bluetooth, which eliminates the supply of gasoline to the cabin.

The principle of operation of the ISBM is that the electrical signals of the gas pressure sensor 3, the gasoline performance sensor 4 and the air differential sensor 5 located in the BIP 1 are processed by the BIP software, which is previously flashed into the microcontroller 6 through the programmer port 7 and buffer 8, after which the information is transmitted in the form of digital signals via the communication channel of the Bluetooth 9 radio module to laptop 2 and is displayed on the laptop screen. In this case, it is possible to control the presence of gasoline before the vehicle starts to move according to the signals of the status LEDs 10 and verify that the BIP is ready for the functioning of the microcontroller and the Bluetooth radio module (Fig. 2).

Thus, the first object of the invention is the MBMS of a vehicle equipped with injection equipment in the engine intake manifold, comprising means for measuring parameters such as gas pressure in the ramp and nozzles, gas supply rate and air pressure in the engine inlet. MSPB includes a laptop with a software and a parameter measuring unit, located in the car interior and outside it, respectively, gas from the gas supply line of the gas supply system and air from the engine inlet enters the parameter measurement unit, from which the parameter information in the form of a radio channel via Bluetooth digital signals are transmitted to the laptop, where it is recorded simultaneously with the temporary markers of jerking the car and in real time is displayed on the laptop screen in the form of waveforms and digital values Eden.

The SPB diagnostic method consists in a combination of sequential and simultaneous simple manual actions of the diagnostician and automatic MSBP operations with large amounts of information on monitoring and real-time digital recording of SPB parameter values, their subsequent reproduction and analysis, related to the moments of jerking and twitching of a moving car, with full ensuring compliance with environmental requirements and fire safety.

Notebook 2 receives signals from the Bluetooth 9 radio module, and the notebook software processes information about the SPB parameters - gas pressure in the ramp, gas pressure on the nozzles, gas supply performance, vacuum in the engine's intake tract. The software simultaneously displays the values of these parameters and the current time on the laptop screen in the form of waveforms and digital values, which makes it possible for the diagnostician to monitor all parameters in real time, and at the time of jerking and twitching of the car, put a time marker 11. In this case, the notebook’s memory is automatically recorded current time, waveforms of parameters and time markers and their digital values, and upon completion of monitoring, based on their playback and viewing, fast and accurate analysis of ION sound technical defect diagnosis and localization.

The principle of making a technical diagnosis is that if the time marker coincides with a violation of the SPB parameters, then this means that the defect is in the SPB. If the time marker does not coincide with the violation of the SPB parameters, and the rarefaction value has not changed, then the defect should be sought in other ICE and car systems; if the value of the vacuum has changed, then this indicates that the jerk or twitching of the car at the moment is not due to a defect, but to the actions of the driver.

Thus, the second object of the invention is a method for diagnosing a gasoline supply system in a moving car equipped with equipment for injecting gasoline into the engine intake manifold, including measuring and analyzing parameters such as gas pressure in the ramp and nozzles, gas supply capacity and air pressure in the intake tract engine. The SPB diagnostics method is carried out by means of the ISBM, while the parameter measurement unit is connected to the gas supply line of the gas supply system and the engine air intake duct and placed outside the vehicle interior, while in the cabin, real-time continuous monitoring is carried out on the laptop and all parameters and time markers are recorded simultaneously jerking the car in the form of waveforms and digital values, then the recorded information is reproduced, analyzed and the technical diagnosis of the gasoline supply system is determined.

Various combinations of the values of the SPB parameters inform about the localization of the defect. So, a simultaneous decrease in pressure and gasoline delivery rate indicates that the defect is located up to (in the direction of gasoline flow) the SPB pressure regulator. A simultaneous increase in pressure and a decrease in gasoline performance indicates that the defect is in or after the pressure regulator. If the pressure regulator has a vacuum control, and the pressure value on the nozzles fluctuates with the vacuum in a wide range, this means a defect in the pressure regulator. If, after the car’s ignition is turned off, the pressure in the ramp decreases below the nominal value or faster than indicated in the technical data for this car, this means that the tightness of the components of the SPB or nozzles is broken. If the pressure is excessive, this means a defective pressure regulator or a blockage in the return line of gasoline. If the gasoline supply capacity is below normal, and when the 12 BIP valve is closed, the gasoline pressure does not increase or slightly increases, then there is a defect in the electric gas pump; and if the pressure rises to the maximum value provided for this gas pump, then there is contamination of the filters or the gas supply line.

Due to the use of a differential sensor 5 and high measurement accuracy, the MSBP also provides another type of technical result, namely, determining the degree of patency of the exhaust engine system by measuring the exhaust back pressure.

The technical result when using MSBE objectively manifests itself in the following technical effects, phenomena and properties: environmental and fire safety and automation of the SPB diagnostic procedures are significantly improved, due to which the possibility of their full implementation on a moving car is first achieved; distortions of readings are reduced, the speed and accuracy of simultaneous monitoring and real-time measurements of SPB parameters in the following ranges are increased: gas pressure in the ramp 0 ÷ 700 kPa, gas pressure on nozzles 0 ÷ 800 kPa, vacuum of the intake air in the intake path of the internal combustion engine 0 ÷ 100 kPa , gasoline delivery rate 0.4 ÷ 4 l / min, when powered by the vehicle’s on-board network + 10 ÷ 15 V with a power consumption of not more than 2 W; a simple, quick and accurate time reference of the moments of jerking and twitching of the car to the current values of all parameters of the SPB is provided; digital recording of markers and parameters in the form of waveforms and digital values and subsequent playback provide accurate and complete analysis of the SPB, quick formulation of a reliable technical diagnosis and localization of the defect.

The achieved technical result is in direct causal connection with such essential features of MSBP as its device, placement in a car, operating principle, diagnostic method, principles of analysis and technical diagnosis.

Brief Description of the Drawings

FIG. 1. The placement of MSBE in the car for diagnostics: 1 - BIP near the internal combustion engine under the hood; 2 - a laptop in the car in the hands of a diagnostician.

FIG. 2. Block diagram of MSBE: 1 - BIP; 2 - laptop; 3 - gas pressure sensor; 4 - gasoline performance sensor; 5 - differential sensor; 6 - microcontroller; 7 - port of the programmer; 8 - buffers; 9 - Bluetooth radio module; 10 - status LEDs; 11 is a temporary marker; 12 - crane.

FIG. 3. BIP 1: 10 - status LEDs; 12 - crane; 13 - input nozzle of the gas supply, 14 - output nozzle of the gas supply; 15 - rarefaction fittings; 16 - exhaust gas fitting, 17 - power cable.

FIG. 4. BIP 1, practical design, appearance: 10 - status LEDs; 12 - crane; 13 - input nozzle of the gas supply, 14 - output nozzle of the gas supply; 15 - rarefaction fittings; 16 - exhaust gas fitting, 17 - power cable.

FIG. 5. Inlet fitting for gas supply 13.

FIG. 6. Gas outlet fitting 14.

FIG. 7. The depression union 15.

FIG. 8. The union of the fulfilled gases 16.

FIG. 9. Connecting the BIP 1 to the supply line of gasoline SPB through hydraulic adapters 18.

FIG. 10. BIP. The circuit is electrical in principle. Microcontroller ATmega8A-PU.

FIG. 11. BIP. The circuit is electrical in principle. Buffer Chip 74AC244N.

FIG. 12. BIP. The circuit is electrical in principle. Pressure sensor MM393A.

FIG. 13. BIP. The circuit is electrical in principle. Differential pressure sensor MPX5500D.

FIG. 14. BIP. The circuit is electrical in principle. Performance Sensor YF-S201.

FIG. 15. BIP. The circuit is electrical in principle. Programming switch 9450-1.

FIG. 16. BIP. The circuit is electrical in principle. Programmer Port

FIG. 17. BIP. The circuit is electrical in principle. Status LEDs.

FIG. 18. BIP. The circuit is electrical in principle. Flex cable for the HC-07 Bluetooth radio module.

FIG. 19. BIP. The circuit is electrical in principle. The connection diagram of the Bluetooth radio module NS-07.

FIG. 20. BIP. The circuit is electrical in principle. Supply voltage regulator +5 V.

FIG. 21. BIP. The circuit is electrical in principle. Power supply voltage regulator +3.3 V.

FIG. 22. The printed circuit board 19 BIP. Wiring conductors.

FIG. 23. The printed circuit board 19 BIP. Practical construction, top view: 5 - differential sensor MPX5500DP; 6 - microcontroller ATmega8A-PU; 7 - port of the programmer; 8 - buffers 74AC244N; 9 - Bluetooth radio module NS-07; 21 - connector for connecting status LEDs; 22 - voltage regulator +5 V 7805.

FIG. 24. The printed circuit board 19 BIP. Practical construction, bottom view: 23 - voltage regulator +3.3 V LM1117-3.3V.

FIG. 25. Hydraulic unit 20 BIP. Practical construction: 3 - pressure sensor MM393A; 4 - performance sensor YF-S201; 12 - crane; 13 - input nozzle of the gas supply, 14 - output nozzle of the gas supply.

FIG. 26. An example of practical diagnosis, a screenshot. At the moment of car jerking at 11 hours 47 min 57 s, the gasoline pressure in the ramp (upper diagram) and the gasoline delivery rate (lower diagram) simultaneously decreased. Technical diagnosis: the defect is in St. Petersburg before (in the direction of gasoline flow) a pressure regulator.

FIG. 27. An example of practical diagnosis, a screenshot. At the time of the car jerking at 14 h 17 min 11 s, the gasoline pressure in the ramp (upper plot) sharply increased, and the gasoline delivery rate (lower plot) simultaneously decreased. Technical diagnosis: the defect is in St. Petersburg in the pressure regulator or in the return line.

FIG. 28. An example of practical diagnosis, a screenshot. At the time of the sharp opening of the throttle at 10 hours 14 min 20 s, the pressure on the nozzles (the third from the top of the diagram) decreased by almost the amount of decrease in vacuum (second diagram). Technical diagnosis: defective pressure regulator SPB.

FIG. 29. An example of practical diagnosis, a screenshot. At the time of the car jerking at 13 hours 38 min 43 s, the pressure (upper and third from the top of the diagram), vacuum (second diagram) and the gas supply rate (lower diagram) almost did not change. Technical diagnosis: the defect is outside of St. Petersburg.

The implementation of the invention

The achieved technical result is confirmed by experimental data obtained during repeated tests of the developed and created practical design of the prototype MBSPB.

BIP 1 (Fig. 3) is made in a housing with dimensions 155 × 125 × 65 mm with status LEDs 10, a crane 12, protruding gas supply inlet 13 (Fig. 5), gas outlet outlet 14 (Fig. 6), vacuum nozzles 15 (Fig. 7), the exhaust gas fitting 16 (Fig. 8) and the power cable 17 (Fig. 3). The appearance of the practical design of the prototype BIP is shown in FIG. four.

The BIP is connected to the supply line of the SPB in such a way that through the inlet nozzle of the gas supply 13, the gas enters the BIP and leaves through the outlet nozzle of the gas supply 14. Through one of the nozzles of the vacuum 15, the BIP is connected to the air intake duct of the engine. If ISMB is used to measure the exhaust back pressure, the BIP is connected to the exhaust system of the vehicle through the nipple 16. The power cable 17 connects the BIP to the vehicle's on-board network.

If the configuration of the hydraulic connections of the supply line of the SPB of the diagnosed vehicle does not match the configuration of the BIP fittings, then the connection is made through the same additional hydraulic adapters 18 (Fig. 9), which are used for existing analogs of the ISPB.

The circuit diagram of the BIP includes the following main circuits: ATmega8A-PU microcontroller (Fig. 10), buffers 74AC244N (Fig. 11), pressure sensor MM393A (Fig. 12), differential sensor MPX5500DP (Fig. 13), performance sensor YF-S201 (Fig. 14), the programming mode switch (Fig. 15), the programmer port (Fig. 16), status LEDs (Fig. 17), the cable of the HC-07 Bluetooth radio module (Fig. 18), the connection diagram of the HC-07 Bluetooth radio module (Fig. 19), a voltage stabilizer +5 V 7805 (Fig. 20) and a voltage stabilizer +3.3 V LM1117-3.3V (Fig. 21).

The components of the BIP circuitry are located inside the housing on the developed (Fig. 22) and manufactured (Fig. 23, 24) printed circuit board 19 and hydraulic assembly 20 (Fig. 25): gasoline pressure sensor 3, gasoline performance sensor 4, air differential sensor 5 (Fig. 23), microcontroller 6, programmer port 7, buffers 8, Bluetooth radio module 9, connector 21 for connecting status LEDs 10, voltage regulators 22 and 23 (Fig. 24).

The obtained experimental data confirmed the conformity of the technical result to the declared purpose of the invention: MSBP provides environmental and fire safety, reliability, simplicity, speed and reliability of diagnostics of the SPB of a moving car - examples of practical technical diagnoses and localization of defects are given in inverted screenshots in FIG. 26-29.

Claims (2)

1. The monitor of the gasoline supply system of a car equipped with equipment for injection into the engine intake manifold, comprising means for measuring parameters such as gas pressure in the ramp and nozzles, gas supply capacity and air pressure in the engine intake tract, characterized in that it includes software a laptop and a unit for measuring parameters located in and out of the vehicle, respectively, gas from the gas supply line of the gas supply system and air from the inlet of the engine STUDIO enter the parameters of the measurement unit from which the Bluetooth radio on parameter information in the form of digital signals transmitted to the laptop, which is recorded together with the time marker and the vehicle runs in real time is displayed on the laptop screen and waveforms in the form of digital values. 2. A method for diagnosing a gasoline supply system in a moving car equipped with equipment for injecting gasoline into the engine intake manifold, including measuring and analyzing parameters such as gas pressure in the ramp and nozzles, gas supply capacity and air pressure in the engine intake tract, characterized in that it is carried out by means of a monitor of a gas supply system according to claim 1, wherein the parameter measuring unit is connected to a gas supply line of a gas supply system and an air intake path d the driver and placed outside the car, and in the cabin carry out continuous monitoring in real time on the laptop and simultaneously record all parameters and time markers of the car jerking in the form of waveforms and digital values, then the recorded information is reproduced, analyzed and the technical diagnosis of the gasoline supply system is recorded.

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