EP3585992A1 - Pressure sensor emulating process in a vehicle and supply system for the engine of a vehicle - Google Patents
Pressure sensor emulating process in a vehicle and supply system for the engine of a vehicleInfo
- Publication number
- EP3585992A1 EP3585992A1 EP18705736.9A EP18705736A EP3585992A1 EP 3585992 A1 EP3585992 A1 EP 3585992A1 EP 18705736 A EP18705736 A EP 18705736A EP 3585992 A1 EP3585992 A1 EP 3585992A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- pressure
- pump
- control
- injectors
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/266—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor the computer being backed-up or assisted by another circuit, e.g. analogue
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/28—Interface circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0605—Control of components of the fuel supply system to adjust the fuel pressure or temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/28—Interface circuits
- F02D2041/281—Interface circuits between sensors and control unit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
- F02D2200/0604—Estimation of fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/31—Control of the fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
- F02D2400/11—After-sales modification devices designed to be used to modify an engine afterwards
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Definitions
- the present invention relates to a pressure sensor emulating process in a vehicle and a supply system for the engine of a vehicle.
- the emulation of the original fuel injectors e.g. petrol
- the corresponding control unit e.g. petrol ECU
- the petrol (or diesel) ECU performs checks on the driving current levels of the petrol injectors to check if the opening has taken place correctly. In performing a "cutting and emulation" strategy the petrol ECU detects a similar current to the one that would be displayed in the injector coil during petrol operation.
- the quantity of fuel injected depends on the opening time of the injector and the pressure at which it is found.
- the relationship is linear with time and follows a square root trend with the pressure of the fuel.
- the strategy proposed in WO2014/024088 envisages acting on the pressure of the original fuel (e.g. petrol) so as to emulate a pressure value that is higher than the one really present so that the corresponding petrol ECU reduces the quantity of fuel to be injected.
- the original fuel e.g. petrol
- the latter is sensitive to the variation in duration of the control sent to the high pressure pump actuator.
- the duration of such control is about 7 ms, whereas to obtain the same target pressure with the gas supply the duration of such control is about 3 ms.
- This discrepancy in the duration of the high pressure pump actuation control determines the reporting of a malfunction by the petrol ECU.
- the technical task underpinning the present invention is to provide a pressure sensor emulating process in a vehicle and a supply system for the engine of a vehicle, which obviate the drawbacks of the prior art cited above.
- an object of the present invention is to propose a pressure sensor emulating process in a vehicle and a supply system for the engine of a vehicle, able to further reduce the generation of diagnostic errors with respect to known solutions.
- Another object of the present invention is to propose a pressure sensor emulating process in a vehicle and a supply system for the engine of a vehicle, able to further reduce the consumption of the original fuel (i.e. the more polluting fuel) with respect to known solutions.
- a pressure sensor emulating process in a vehicle comprising the steps of:
- said second control unit in response to receiving the actuation control, inhibits the actuation of the first pump so that the first fuel is dispensed by the first pump at a pressure equal to the inlet pressure.
- the second control unit in response to receiving the actuation control, the second control unit generates a further actuation control of the first pump.
- the actuation control sent to the first pump is made available to a diagnostic unit in the form of a duty percentage.
- the actuation control sent to the first pump corresponds to a duration of the control read via hardware.
- the emulation signal is generated by the second control unit.
- the technical tasks and the specified objects are obtained by a supply system for the engine of a vehicle, comprising:
- a first control unit configured to control the supply of the first fuel to thefirst series of injectors
- a second control unit configured to control the supply of the second fuel to the second series of injectors
- the first control unit being configured to generate an actuation control to control the first pump therefore the first pump takes the first fuel from the tank at the inlet pressure and dispenses the first fuel to the first series of injectors at an outlet pressure higher than the inlet pressure;
- a pressure sensor situated in proximity to the first series of injectors for detecting a signal representing the outlet pressure of the first fuel
- an emulation device configured to generate an emulation signal of the signal representing the outlet pressure in response to a rated pressure
- FIG. 1 illustrates a simplified diagram of a supply system for the engine of a vehicle, according to the present invention
- FIG. 2 and 3 illustrate the block diagram of the supply system of figure 1 , in two different variant embodiments.
- the first fuel Ci is the more polluting fuel used by the vehicle, for example petrol or diesel. In the sector, the first fuel Ci is also known as the "original fuel”.
- the second fuel C 2 is the less polluting fuel used by the vehicle, for example LPG or methane. In the sector, the second fuel C 2 is also known as the "alternative fuel”.
- the first pump P hP is also known in the field by the term "high pressure pump”.
- the rated pressure p t of the first fuel Ci is known in the field by the technical term "target pressure".
- the rated pressure value p t varies according to the engine's load conditions.
- the rated actuation control c t of the first pump P hp also called “target control”, is pre-set during calibration according to the engine's load conditions.
- number 1 denotes a supply system 1 for the engine of a vehicle.
- the supply system 1 comprises:
- a first series of injectors for injecting a first fuel C-i such as, for example, petrol or diesel;
- a second series of injectors l 2 for injecting a second fuel C 2 such as, for example, LPG or methane;
- the supply of each fuel is controlled by dedicated control units.
- a first control unit ECUi is configured to control the supply of the first fuel Ci towards the first series of injectors ⁇ and a second control unit ECU 2 is configured to control the supply of the second fuel C 2 towards the second series of injectors l 2 .
- the first fuel Ci is contained in a tank 2 at atmospheric pressure.
- a first pump P hP is interposed (hereinafter simply known as "high pressure pump").
- P is located (hereinafter simply known as "low pressure pump”).
- the first control unit ECUi is configured to generate an actuation control c a ' to control the first pump P hp therefore the latter takes the first fuel Ci from the tank 2 at an inlet pressure p, (e.g. 5 bar) and dispenses such first fuel Ci to the first series of injectors at an outlet pressure p u higher than the inlet pressure p,.
- p inlet pressure
- the outlet pressure p u is variable according to the operating condition of the vehicle's engine. For example, values comprised between 20 bar up to over 200 bar can be obtained. The quantity of the first fuel Ci injected into the engine cylinder will be higher the higher the outlet pressure p u .
- the supply system 1 further comprises a pressure sensor 3 situated in proximity to the first series of injectors for detecting a signal representing the outlet pressure p u of the first fuel C-i.
- the actuation control c a of the first pump P hp is made available to a diagnostic unit 4 (hereinafter also abbreviated as "OBD", which stands for On-Board Diagnostics) in the form of a cyclic opening ratio of the fuel pressure regulator c a % (known as "duty"), in percentage format.
- OBD On-Board Diagnostics
- the supply system 1 comprises an emulation device configured to generate an emulation signal p e of the signal representing the outlet pressure p u in response:
- the target pressure p t is acquired by the gas ECU through the diagnostic unit 4.
- the emulation signal p e of the signal representing the outlet pressure p u is hereinafter also referred to as the "emulated pressure".
- the second control unit ECU 2 comprises the emulation device.
- the emulation device is part of the second control unit ECU 2 .
- the emulation device is a distinct and separate device with respect to the second control unit ECU2.
- the first control unit ECU 1 receives the incoming emulation signal p e and, in response to the latter and to the rated pressure value p t of the first fuel
- Ci generates an actuation control c a which is intercepted by the second control unit ECU 2 .
- Such process comprises the steps of:
- the first pump P h p dispenses the first fuel Ci at an outlet pressure p u that is higher than the inlet pressure p,;
- the first control unit ECUi drives the first series of injectors in response to the emulation signal p e and to the rated pressure value p t of the first fuel
- the first control unit ECUi generates the actuation control c a which is intersected by the second control unit ECU 2 , appointed to drive the second series of injectors .
- the emulation signal p e is generated by the second control unit ECU 2 .
- the second control unit ECU2 in response to receiving the actuation control c a, the second control unit ECU2 generates a further actuation control c a ' of the first pump Ph P .
- the further actuation control Ca 0.
- the second control unit ECU2 inhibits the actuation of the first pump Ph P so that the latter dispenses the first fuel Ci at a pressure equal to the inlet pressure p,.
- the first fuel Ci e.g. petrol
- the petrol injectors at low pressure (typically around 5 bar).
- such interruption is performed by means of a relay.
- the gas ECU acquires the target pressure p t through the diagnostic unit 4. Alternatively, the target pressure p t is mapped during the vehicle configuration step.
- the actuation control c a of the high pressure pump Ph P may be acquired in two alternative methods, described below.
- the actuation control c a is read by the OBD line in the form of a cyclic opening ratio of the fuel pressure regulator c a % (known as "duty"), in percentage format.
- the actuation control c a is read via hardware in the form of the duration of the control or an equivalent electrical magnitude.
- the target control c t is mapped during the vehicle configuration step.
- the format of the values of this map is the same as that used for acquiring the actuation control c a of the high pressure pump P hp .
- the gas ECU can cut off the pressure sensor 3, for example, through a relay, and emulate to the petrol ECU a pressure value around the target pressure p t , applying a corrective factor depending on the difference between the actuation control c a of the high pressure pump P hp detected and the target control c t .
- the formula of the emulated pressure p e is:
- - c a % is the "duty" percentage read for the actuation control c a of the high pressure pump Ph P ;
- - f is a function that has a proportional component to the difference (c t % - c a %), possibly with integrative and/or derivative components.
- the emulated pressure p e will be higher than the target pressure p t in order to bring the control c a closer to the target control c t (therefore the formula will apply the "+" sign).
- the emulated pressure p e will be lower than the target pressure p t in order to bring the control c a closer to the target control c t (therefore the formula will apply the "-" sign).
- the formula of the emulated pressure p e is:
- T a is the duration of the actuation control c a of the high pressure pump P hp ;
- - T t is the duration of the target control; - f is a function that has a proportional component to the difference (T t - T a ), possibly with integrative and/or derivative components.
- the supply system proposed herein is further configured to perform a leak diagnosis, i.e. it is configured to verify the presence of any leaks on the fuel supply system in the switch off step, when the gas ECU cuts off the actuator of the high pressure pump Ph P .
- the process for diagnosing the presence of leaks envisages emulating an appropriate pressure value for the entire duration of the diagnosis (which can be calibrated during the vehicle configuration), as the vehicle is switched off and, for vehicles with the "Start and Stop" system, during the Stop step.
- a “Start and Stop” system switches off and automatically restarts an internal combustion engine so as to reduce the time for which the engine is running and the vehicle is stopped, in order to reduce fuel consumptions and reduce polluting emissions.
- the gas ECU is able to emulate the petrol pressure so as to prevent diagnostic errors during the following steps:
- the drivability of the vehicle is improved due to the presence of only one fuel (e.g. gas) in many operating conditions.
- fuel e.g. gas
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102017000022054A IT201700022054A1 (en) | 2017-02-27 | 2017-02-27 | EMULATION PROCEDURE OF A PRESSURE SENSOR IN A VEHICLE AND FUEL SYSTEM FOR A VEHICLE ENGINE |
PCT/IB2018/050865 WO2018154410A1 (en) | 2017-02-27 | 2018-02-13 | Pressure sensor emulating process in a vehicle and supply system for the engine of a vehicle |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3585992A1 true EP3585992A1 (en) | 2020-01-01 |
Family
ID=59101624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18705736.9A Withdrawn EP3585992A1 (en) | 2017-02-27 | 2018-02-13 | Pressure sensor emulating process in a vehicle and supply system for the engine of a vehicle |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3585992A1 (en) |
IT (1) | IT201700022054A1 (en) |
WO (1) | WO2018154410A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2458500A (en) * | 2008-03-20 | 2009-09-23 | Hybrid Comb Ltd | A method of and system for fuel injected internal combustion engines |
GB0807859D0 (en) * | 2008-04-30 | 2008-06-04 | Mobilizer Ltd | A System for and method of determining the quantity of fuel injected into internal combustion engines |
US20130066536A1 (en) * | 2009-01-12 | 2013-03-14 | Gas Tek Solutions Pty Ltd. | Sensor output modifier |
WO2010103288A1 (en) * | 2009-03-13 | 2010-09-16 | T Baden Hardstaff Ltd | A method and a control device for controlling an engine |
GB0907614D0 (en) * | 2009-05-01 | 2009-06-10 | Intelligent Diesel Systems Ltd | Apparatus and method for controlling a multi-fuel engine |
WO2013000031A1 (en) * | 2011-06-30 | 2013-01-03 | Orbital Australia Pty Ltd | Dual fuel conversion |
ITPR20120054A1 (en) * | 2012-08-10 | 2014-02-11 | A E B S P A | PROCEDURE AND DEVICE EMULATION PRESSURE SENSOR IN VEHICLES EQUIPPED WITH FUEL INJECTORS AND POWERED BY MORE THAN ONE FUEL |
-
2017
- 2017-02-27 IT IT102017000022054A patent/IT201700022054A1/en unknown
-
2018
- 2018-02-13 EP EP18705736.9A patent/EP3585992A1/en not_active Withdrawn
- 2018-02-13 WO PCT/IB2018/050865 patent/WO2018154410A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
IT201700022054A1 (en) | 2018-08-27 |
WO2018154410A1 (en) | 2018-08-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2122144B1 (en) | Engine fuel supply system | |
US8700288B2 (en) | Method for assessing a method of functioning of a fuel injector in response to the application of a control voltage, and corresponding evaluation device | |
US9051893B2 (en) | Method for detecting a malfunction in an electronically regulated fuel injection system of an internal combustion engine | |
EP2029882B1 (en) | Method and apparatus for supplying fuel of lpg car having lpi system | |
US20120085326A1 (en) | Method and apparatus for converting diesel engines to blended gaseous and diesel fuel engines | |
CN103244287A (en) | Method and system for engine control | |
WO2009141199A1 (en) | Method for identifying an error function and in particular a drift of a rail pressure sensor in a common rail injection system | |
US7578288B2 (en) | Method for operating an internal combustion engine, computer program product, computer program, and control and/or regulating device for an internal combustion engine | |
US7497205B2 (en) | Controller and control method for an engine control unit | |
US11085387B2 (en) | Systems and methods for performing engine de-rate control operation of a vehicle | |
KR20070027950A (en) | Fuel system control method of lpi engine vehicle for fuel cut in an emergency | |
EP3585992A1 (en) | Pressure sensor emulating process in a vehicle and supply system for the engine of a vehicle | |
KR101664626B1 (en) | Method and apparatus for controlling injector drive | |
JPH04214939A (en) | Method and device for controlling solenoid valve for fuel pump | |
US20220381191A1 (en) | Mixed fuel engine | |
US10161340B1 (en) | Fuel injection system and method for a vehicle propulsion system | |
JP5874622B2 (en) | Fuel injection control device for internal combustion engine | |
EP2438282B1 (en) | Method and device for powering a diesel engine with dual fuel feed | |
US10400731B2 (en) | Method and device for diagnosing a fuel delivery system | |
JPS58187553A (en) | Idling speed control device for engine | |
KR100765642B1 (en) | Apparatus and method for operating limp home mode according to trouble of fuel pump in car fitted with lpg injection system | |
JP2010038143A (en) | Internal combustion engine control device | |
JPH1077890A (en) | Monitoring method and monitor for flow limiter in fuel quantity adjusting system for internal combustion engine | |
WO2017129394A1 (en) | A device and method to determine fuel pressure at a fuel injector | |
WO2014091723A1 (en) | Fuel injection control device for internal combustion engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20190726 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20220216 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20220628 |