SE542041C2 - A system and a method for provision of a liquid substance for an internal combustion engine configuration - Google Patents

A system and a method for provision of a liquid substance for an internal combustion engine configuration

Info

Publication number
SE542041C2
SE542041C2 SE1750691A SE1750691A SE542041C2 SE 542041 C2 SE542041 C2 SE 542041C2 SE 1750691 A SE1750691 A SE 1750691A SE 1750691 A SE1750691 A SE 1750691A SE 542041 C2 SE542041 C2 SE 542041C2
Authority
SE
Sweden
Prior art keywords
liquid substance
tank unit
unit
engine configuration
tank
Prior art date
Application number
SE1750691A
Other versions
SE1750691A1 (en
Inventor
Tommy Albing
Ulf Carlsson
Original Assignee
Scania Cv Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Scania Cv Ab filed Critical Scania Cv Ab
Publication of SE1750691A1 publication Critical patent/SE1750691A1/en
Publication of SE542041C2 publication Critical patent/SE542041C2/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/077—Fuel tanks with means modifying or controlling distribution or motion of fuel, e.g. to prevent noise, surge, splash or fuel starvation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
    • F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank
    • F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03118—Multiple tanks, i.e. two or more separate tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03118—Multiple tanks, i.e. two or more separate tanks
    • B60K2015/03138—Pumping means between the compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03118—Multiple tanks, i.e. two or more separate tanks
    • B60K2015/03144—Fluid connections between the tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/0319—Fuel tanks with electronic systems, e.g. for controlling fuelling or venting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/14—Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1406—Storage means for substances, e.g. tanks or reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
    • F01N2900/06—Parameters used for exhaust control or diagnosing
    • F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
    • F01N2900/1806—Properties of reducing agent or dosing system
    • F01N2900/1814—Tank level
    • 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
    • F02D2200/0625—Fuel consumption, e.g. measured in fuel liters per 100 kms or miles per gallon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps

Abstract

The invention relates to a method for provision of a liquid substance for an internal combustion engine configuration (299), said engine configuration (299) comprising a first tank unit (220) for holding said liquid substance and a second tank unit (250) for holding said liquid substance, a first pump unit (230) for providing liquid substance from said first tank unit (220) to said second tank unit (250), a second pump unit (270) for providing liquid substance from said second tank unit (250) for consumption within said engine configuration (299), comprising the steps of:- continuously determining a mass flowof said liquid substance taken from said second tank unit (250) for consumption within said engine configuration (299);- continuously determining a prevailing remaining amount of said liquid substance in said second tank unit (250) based on said determined mass flow (m2) of said liquid substance taken from said second tank unit (250); and- according to predetermined criteria relating to the prevailing remaining amount of said liquid substance in said second tank unit (250), providing liquid substance to said second tank unit (250) from said first tank unit (220).The invention relates also to a computer programme product comprising program code (P) for a computer (200; 210) for implementing a method according to the invention. The invention relates also to a system for provision of a liquid substance for an internal combustion engine configuration (299) and a motor vehicle (100) equipped with the system.

Description

A system and a method for provision of a liquid substance for an internal combustion engine configuration TECHNICAL FIELD The present invention relates to a method for provision of a liquid substance for an internal combustion engine configuration. More particularly, the present invention relates to a method for provision of fuel to an internal combustion engine. The present invention may also relate to a method for provision of a reducing agent substance, such as urea, to an exhaust gas system of an internal combustion engine.The invention relates also to a computer program product comprising program code for a computer for implementing a method according to the invention. It relates also to a system for provision of a liquid substance for an internal combustion engine configuration and a motor vehicle equipped with the system.
BACKGROUND ART In some liquid substance supply systems for an engine configuration of a vehicle two fuel tanks are provided. According to one set-up there are two pump units and two filter units arranged in such a supply system. It is desired to be able to adequately distribute said liquid substance between a first tank and a second tank. Said liquid substance supply system may be a fuel supply system for an internal combustion engine. One way of determining prevailing respective levels of said liquid substance is to provide a level sensor in each of said tanks. This is however not optimal, paying regard to system complexity and costs associated with the level sensors, etc.
WO2013093544 relates to a fuel supply system on an automotive vehicle involving calculations of a fuel amount consumed by a combustion engine.
SUMMARY OF THE INVENTION An object of the present invention is to propose a novel and advantageous method for provision of a liquid substance for an internal combustion engine configuration.
Another object of the invention is to propose a novel and advantageous system and a novel and advantageous computer program for provision of a liquid substance for an internal combustion engine configuration.
Another object of the present invention is to propose a novel and advantageous method providing a reliable and cost effective provision of a liquid substance for an internal combustion engine configuration.
Another object of the invention is to propose a novel and advantageous system and a novel and advantageous computer program providing a reliable and cost effective provision of a liquid substance for an internal combustion engine configuration.
Yet another object of the invention is to propose a method, a system and a computer program achieving an improved provision of a liquid substance for an internal combustion engine configuration.
Yet another object of the invention is to propose an alternative method, an alternative system and an alternative computer program for provision of a liquid substance for an internal combustion engine configuration.
Some of these objects are achieved with a method according to claim 1. Other objects are achieved with a system in accordance with what is depicted herein. Advantageous embodiments are depicted in the dependent claims. Substantially the same advantages of method steps of the innovative method hold true for corresponding means of the innovative system.
According to an aspect of the invention there is provided a method for provision of a liquid substance for an internal combustion engine configuration, said engine configuration comprising a first tank unit for holding said liquid substance and a second tank unit for holding said liquid substance, a first pump unit for providing liquid substance from said first tank unit to said second tank unit, a second pump unit for providing liquid substance from said second tank unit for consumption within said engine configuration. The method comprises the steps of: - continuously determining a mass flow of said liquid substance taken from said second tank unit for consumption within said engine configuration; - continuously determining a prevailing remaining amount of said liquid substance in said second tank unit based on said determined mass flow of said liquid substance taken from said second tank unit; and - according to predetermined criteria relating to the prevailing remaining amount of said liquid substance in said second tank unit, providing liquid substance to said second tank unit from said first tank unit.
Advantageously a reliable and accurate method for provision of a liquid substance is provided. Further, by determining/estimating the prevailing remaining amount of liquid substance in the second tank unit, there is no need for a level sensor arranged at said second tank unit. This advantageously provides a cost effective operation according to the inventive method.
According to one example a suitable time interval regarding provision of liquid substance to said second tank unit from said first tank unit may be determined/predicted/estimated on the basis of said determined prevailing remaining amount of said liquid substance in said second tank unit. Said predetermined criteria may pay regard to the operation of said engine configuration.
According to one example said mass flow of liquid substance taken from said second tank unit may be determined/estimated/calculated/modelled on the basis of operation of said second pump unit.
The method may comprise the step of: - continuously determining a consumed amount of said liquid substance provided in accordance with a control unit for operating said engine configuration. This may be performed by determining an amount of injected liquid substance to said engine configuration and/or by determining emission parameters (e.g. NOx or Oxygen content) of an exhaust gas from a combustion engine of said engine configuration. This advantageously provides a versatile method. Further this provides an accurate method for provision of said liquid substance.
The method may comprise the step of: - continuously determining a consumed amount of said liquid substance on the basis of operation of said second pump unit. This may be performed by determining a mass flow of said liquid substance from said second tank unit for consumption within said engine configuration subtracted by a determined return mass flow from a combustion engine of said engine configuration to said second tank unit. This allows to accurately determine a consumed amount of said liquid substance.
The method may comprise the step of: - continuously determining an amount of return liquid substance not included in said consumption but provided back to said second tank unit.
The determined consumed amount of said liquid substance may be used to determine said prevailing remaining amount of substance liquid in said second tank.
The method may comprise the step of: - when, according to said predetermined criteria, liquid substance to said second tank unit from said first tank unit is provided to said second tank unit, filling said second tank unit to a predetermined extent. This advantageously allows to adequately and suitably provide said liquid substance to said second tank unit, both in terms of provision rate, timing regarding provision and amount of provided liquid substance.
The method may comprise the step of: - continuously providing said liquid substance to said second tank unit on the basis of said prevailing remaining amount of liquid substance in the second tank. Hereby provision may be performed continuously, and not intermittently, which renders less wear of the first pump unit as well as more desired operational conditions of the first pump unit, e.g. relatively low rpm.
The method may comprise the step of: - continuously providing said liquid substance to said second tank unit on the basis of said consumption within said engine configuration. Hereby provision may be performed continuously, and not intermittently, which renders less wear of the first pump unit as well as more desired operational conditions of the first pump unit, e.g. relatively low rpm.
Said liquid substance may be a fuel substance or a reducing agent for emission control. The method is thus versatile and applicable for various liquid substance provision systems, e.g. a fuel supply system or an SCR-system presenting two tank units for holding a reducing agent comprising e.g. urea.
According to an aspect of the invention there is provided a system for provision of a liquid substance for an internal combustion engine configuration, said engine configuration comprising a first tank unit for holding said liquid substance and a second tank unit for holding said liquid substance, a first pump unit for providing liquid substance from said first tank unit to said second tank unit, a second pump unit for providing liquid substance from said second tank unit for consumption within said engine configuration. The system may comprise: - means arranged for continuously determining a mass flow of said liquid substance taken from said second tank unit for consumption within said engine configuration; - means arranged for continuously determining a prevailing remaining amount of said liquid substance in said second tank unit based on said determined mass flow of said liquid substance taken from said second tank unit; and - means arranged for, according to predetermined criteria relating to the prevailing remaining amount of said liquid substance in said second tank unit, providing liquid substance to said second tank unit from said first tank unit.
The system may comprise: - means arranged for continuously determining a consumed amount of said liquid substance provided in accordance with a control unit for operating said engine configuration.
The system may comprise: - means arranged for continuously determining a consumed amount of said liquid substance on the basis of operation of said second pump unit.
The system may comprise: - means arranged for continuously determining an amount of return liquid substance not included in said consumption but provided back to said second tank unit.
The system may comprise: - means arranged for filling said second tank unit to a predetermined extent, when, according to said predetermined criteria, liquid substance to said second tank unit from said first tank unit is provided to said second tank unit,.
The system may comprise: - means arranged for continuously providing said liquid substance to said second tank unit on the basis of said determined prevailing remaining amount of liquid substance in said second tank unit.
The system may comprise: - means arranged for continuously providing said liquid substance to said second tank unit on the basis of said consumption within said engine configuration.
At the system said liquid substance may be a fuel substance or a reducing agent for emission control.
According to an aspect of the invention there is provided a vehicle comprising a system according to what is presented herein. Said vehicle may be any from among a truck, bus or passenger car. According to an embodiment the system is provided for a marine application or industrial application.
According to an aspect of the invention there is provided a computer program for provision of a liquid substance for an internal combustion engine configuration, wherein said computer program comprises program code for causing an electronic control unit or a computer connected to the electronic control unit to perform anyone of the method steps depicted herein, when run on said electronic control unit or said computer.
According to an aspect of the invention there is provided a computer program for provision of a liquid substance for an internal combustion engine configuration, wherein said computer program comprises program code stored on a computer-readable medium for causing an electronic control unit or a computer connected to the electronic control unit to perform anyone of the method steps depicted herein.
According to an aspect of the invention there is provided a computer program for provision of a liquid substance for an internal combustion engine configuration, wherein said computer program comprises program code stored on a computer-readable medium for causing an electronic control unit or a computer connected to the electronic control unit to perform anyone of the method steps depicted herein, when run on said electronic control unit or said computer.
According to an aspect of the invention there is provided a computer program product containing a program code stored on a computer-readable medium for performing anyone of the method steps depicted herein, when said computer program is run on an electronic control unit or a computer connected to the electronic control unit.
According to an aspect of the invention there is provided a computer program product containing a program code stored non-volatile on a computer-readable medium for performing anyone of the method steps depicted herein, when said computer program is run on an electronic control unit or a computer connected to the electronic control unit.
Further objects, advantages and novel features of the present invention will become apparent to one skilled in the art from the following details, and also by putting the invention into practice. Whereas the invention is described below, it should be noted that it is not confined to the specific details described. One skilled in the art having access to the teachings herein will recognise further applications, modifications and incorporations in other fields, which are within the scope of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS For fuller understanding of the present invention and its further objects and advantages, the detailed description set out below should be read in conjunction with the accompanying drawings, in which the same reference notations denote similar items in the various diagrams, and in which: Figure 1 schematically illustrates a vehicle according to an embodiment of the invention; Figure 2 schematically illustrates a system according to an embodiment of the invention; Figure 3a is a schematic flowchart of a method according to an embodiment of the invention; Figure 3b is a more detailed schematic flowchart of a method according to an embodiment of the invention; and Figure 4 schematically illustrates a computer according to an embodiment of the invention.
DETAILED DESCRIPTION Figure 1 depicts a side view of a vehicle 100. The exemplified vehicle 100 comprises a tractor unit 110 and a trailer 112. The vehicle 100 may be a heavy vehicle, e.g. a truck or a bus. It may alternatively be a car.
It should be noted that the inventive system is applicable to various vehicles, such as e.g. a mining machine, tractor, dumper, wheel-loader, platform comprising an industrial robot, forest machine, earth mover, road construction vehicle, road planner, emergency vehicle or a tracked vehicle.
It should be noted that the invention is suitable for application in various systems comprising a similar setup as depicted herein, e.g. a first and second tank for holding a liquid, a first pump unit for providing said liquid from the first tank to the second tank and a second pump unit for providing said liquid from said second tank to an engine configuration. It should be noted that the invention is suitable for application with any combustion engine is therefore not confined to combustion engines of motor vehicles. The innovative method and the innovative system in one aspect of the invention are well suited to other platforms which comprise a combustion engine system than motor vehicles, e.g. watercraft. The watercraft may be of any kind, e.g. motor boats, steamers, ferries or ships.
The innovative method and the innovative system according to one aspect of the invention are also well suited to, for example, systems which comprise industrial combustion engines and/or combustion engine-powered industrial robots.
The innovative method and the innovative system according to one aspect of the invention are also well suited to various kinds of power plants, e.g. an electric power plant which comprises a combustion engine-powered generator.
The innovative method and the innovative system are also well suited to various combustion engine systems.
The term "link" refers herein to a communication link which may be a physical connection such as an opto-electronic communication line, or a non-physical connection such as a wireless connection, e.g. a radio link or microwave link.
Figure 2 schematically illustrates a fuel supply system for a combustion engine configuration 299. According to this embodiment said combustion engine configuration 299 comprises an internal combustion engine 290 to which said fuel is supplied. It should be noted that even though it is hereby depicted a fuel supply system for a combustion engine configuration a similar set-up for e.g. an SCR-system may be provided. According to this embodiment a liquid reducing agent may be provided to said combustion engine configuration 299, said configuration comprising an exhaust gas pipe arrangement to which said reducing agent is provided for emission control by means of an SCR-unit.
A first tank unit 220 is arranged to hold a liquid fuel substance, e.g. diesel, gasoline or an ethanol based fuel. Said first tank unit 220 may present a volume of e.g. 1000 litres. Said first tank unit 220 may be denoted main tank or primary tank. A level sensor 235 is arranged in said first tank unit 220. Said level sensor 235 is arranged to continuously measure a prevailing level LI of said liquid fuel substance in said first tank unit 220. Said level sensor 235 may be arranged for communication with a first control unit 200 via any suitable means, e.g. a link (not shown). Said level sensor 235 is arranged to continuously or intermittently send signals comprising information about said measured prevailing level LI to the first control unit 200. Hereby it is illustrated that said first tank unit 220 is holding a volume of said fuel substance presenting said prevailing level L1.
A first passage P231, such as a pipe arrangement, is arranged to convey said liquid fuel substance from said first tank unit 220 to a first pump unit 230. Said first pump unit 230 may be any suitable pump unit, such as a mechanical or electrical pump unit. Said first control unit 200 may be arranged to control operation of said first pump unit 230 via any suitable means, e.g. a link (not shown). Said first pump unit 230 is arranged to suck said fuel substance from said first tank unit 220, pressurize said fuel substance, and provide said fuel substance to a first filter unit 240. Hereby said first filter unit 240 is arranged to filter said fuel substance. Said fuel substance is hereby conveyed via a second pipe P241 to a second tank unit 250. Said second tank unit 250 may be arranged to hold e.g. 25 or 50 litres. Said second fuel tank unit 250 may be denoted auxiliary tank or secondary tank.
According to an embodiment a first mass flow sensor unit 235 is provided to continuously or intermittently measure a prevailing first mass flow value Image available on "Original document" of said liquid fuel substance. Said first mass flow sensor unit 235 is arranged to measure said first mass flow valueImage available on "Original document" downstream of said first pump unit 230 and upstream of said first filter unit 240. Said first mass flow sensor unit 235 is arranged for communication with said first control unit 200 via a link L235. Said first mass flow sensor unit 235 is arranged to continuously or intermittently send signals 5235 comprising information about said detected prevailing first mass flow value Image available on "Original document" to said first control unit 200 via said link L235. According to one example said first filter unit 240 is omitted.
A second passage P271, such as a pipe arrangement, is arranged to convey said liquid fuel substance from said second tank unit 250 to a second pump unit 270. Said second pump unit 270 may be any suitable pump unit, such as a mechanical or electrical pump unit. Said first control unit 200 may be arranged to control operation of said second pump unit 270 via any suitable means, e.g. a link (not shown). Said second pump unit 270 is arranged to suck said fuel substance from said second tank unit 250, pressurize said fuel substance, and provide said fuel substance to a second filter unit 280. Hereby it is illustrated that said second tank unit 250 is holding a volume of said fuel substance presenting a level L2. Said second pump unit 270 may be arranged in said second fuel tank unit 250. Alternatively said second fuel tank unit 270 is arranged outside said second fuel tank unit 250. According to one embodiment said second filter unit 280 may be omitted.
According to an embodiment a second mass flow sensor unit 285 is provided for continuously or intermittently measuring a prevailing second mass flow value Image available on "Original document" of said liquid fuel substance. Said second mass flow sensor unit 285 is arranged to measure said second mass flow valueImage available on "Original document" downstream of said second filter unit 280 and upstream of an internal combustion engine 290. Said second mass flow sensor unit 285 is arranged for communication with said first control unit 200 via a link L285. Said second mass flow sensor unit 285 is arranged to continuously or intermittently send signals 5285 comprising information about said detected prevailing second mass flow valueImage available on "Original document" to said first control unit 200 via said link L285.
Said first control unit 200 is according to one example arranged to control operation of said first pump unit 230 and said second pump unit 270 via any suitable means. Said first control unit 200 is arranged to continuously or intermittently determine at least one prevailing operation condition parameter of said first pump unit 230. Said first control unit 200 is arranged to continuously or intermittently determine at least one prevailing operation condition parameter of said second pump unit 230. Said prevailing operation condition parameters may comprise information about e.g. rotational speed of said pump units.
Said first control unit 200 may be arranged to determine/estimate/calculate/model said first mass flow value Image available on "Original document" . Said first control unit 200 may be arranged to determine/estimate/calculate/model said first mass flow valueImage available on "Original document" on the basis of said determined at least one operation condition parameter of said first pump unit 230. Said first control unit 200 may be arranged to determine/estimate/calculate/model said first mass flow valueImage available on "Original document" on the basis of operation of said first pump unit 230.
Said first control unit 200 may be arranged to determine/estimate/calculate/model said second mass flow value Image available on "Original document" . Said first control unit 200 may be arranged to determine/estimate/calculate/model said second mass flow valueImage available on "Original document" on the basis of said determined at least one operation condition parameter of said second pump unit 270. Said first control unit 200 is arranged to determine/estimate/calculate/model said second mass flow valueImage available on "Original document" on the basis of operation of said second pump unit 270.
A first return passage P291 is arranged to provide a first leak flow Image available on "Original document" leak of said provided liquid fuel substance from said combustion engine 290 to said second tank unit 250. This is due to that some of the provided fuel is used for other purposes at said combustion engine 290 than combustion. Said first flowImage available on "Original document" leak may be determined by means of a mass flow sensor (not shown). Alternatively said first flowImage available on "Original document" leak may be determined by said first control unit 200 by modelling/calculating/estimating said first flowImage available on "Original document" leak. Said first flowImage available on "Original document" lleak may be a predetermined leak flow. Said first leak flow may have been determined empirically.
A second return passage P251 is arranged to, when applicable, provide a second leak flow Image available on "Original document" leak of said liquid fuel substance from said second tank unit 250 to said first tank unit 220. Said second return passage P251 is arranged to allow said second leak flowImage available on "Original document" leak at a state where said second tank unit 250 is substantially, or completely, full, thus providing a reliable safety function regarding undesired extensive filling of the second tank unit.
The first control unit 200 is arranged to continuously determining the mass flow Image available on "Original document" of said liquid substance taken from said second tank unit 250 for consumption within said engine configuration 299. According to one example this may be performed by means of said second mass flow sensor 285. According to one example this may be performed by means of said second mass flow sensor 285 and by determining said first flowImage available on "Original document" leak so as to determine an actually consumed amount of said liquid substance. According to one example this may be performed by determining an amount of injected fuel to the combustion engine of the engine configuration 299. According to one example this may be performed by determining an amount of injected reducing agent to the emission passage of the combustion engine of the engine configuration 299. According to one example this may be performed on the basis of a determined amount of supplied air for said combustion engine of said engine configuration 299 and a determined oxygen amount value of emissions from said combustion engine of said engine configuration 299.
The first control unit 200 is arranged to continuously determining a prevailing remaining amount of said liquid substance in said second tank unit 250. Said prevailing remaining amount of liquid substance is suitably determined based on said determined mass flow Image available on "Original document" of said liquid substance taken from said second tank unit 250 for consumption within said engine configuration 299. This is advantageously performed with no need for a fuel/reducing agent level sensor unit of the second tank unit 250.
The first control unit 200 may be arranged to, according to predetermined criteria comprising a liquid substance amount in said second tank unit 250, control provision of said liquid substance to said second tank unit 250 from said first tank unit 220. The first control unit 200 is suitably arranged to, according to predetermined criteria relating to the prevailing remaining amount of liquid substance in said second tank unit 250, control provision of said liquid substance to said second tank unit 250 from said first tank unit 220. Said predetermined criteria may relate to a certain fuel volume/level of said liquid substance amount in said second tank unit 250. Said predetermined criteria may relate to a certain predetermined fuel volume/level of said liquid substance amount in said second tank unit 250. Said predetermined criteria may relate to a certain desired minimum fuel volume/level of said liquid substance amount in said second tank unit 250. Thus, the first control unit 200 may be arranged to provide liquid substance to said second tank unit 250 if the determined prevailing remaining amount of liquid substance in the second tank unit 250 does not fulfil the predetermined criteria. The first control unit 200 may be arranged to provide liquid substance to said second tank unit 250 if the determined prevailing remaining amount of liquid substance in the second tank unit 250 is below a predetermined level according to the predetermined criteria.
A second control unit 210 is arranged for communication with the first control unit 200 via a link L210. It may be releasably connected to the first control unit 200. It may be a control unit external to the vehicle 100. It may be adapted to performing the innovative steps according to the invention. It may be used to cross-load software to the first control unit 200, particularly software for applying the innovative method. It may alternatively be arranged for communication with the first control unit 200 via an internal network on board the vehicle. It may be adapted to performing functions corresponding to those of the first control unit 200, such as according to predetermined criteria comprising a liquid substance amount in said second tank unit 250, providing liquid substance to said second tank unit 250 from said first tank unit 220.
Figure 3a schematically illustrates a flow chart of a method for provision of a liquid substance for an internal combustion engine configuration 299, said engine configuration 299 comprising a first tank unit 220 for holding said liquid substance and a second tank unit 250 for holding said liquid substance, a first pump unit 230 for providing liquid substance from said first tank unit 220 to said second tank unit 250, a second pump unit 270 for providing liquid substance from said second tank unit 250 for consumption within said engine configuration 299. The method comprises a first method step s301. The method step s301 comprises the steps of: - continuously determining a mass flow Image available on "Original document" of said liquid substance taken from said second tank unit 250 for consumption within said engine configuration 299; - continuously determining a prevailing remaining amount of said liquid substance in said second tank unit 250 based on said determined mass flow Image available on "Original document" ; and - according to predetermined criteria relating to the prevailing remaining amount of said liquid substance in said second tank unit 250, providing liquid substance to said second tank unit 250 from said first tank unit 220.
After the method step s301 the method ends/is returned.
Figure 3b schematically illustrates a flow chart of a method for provision of a liquid substance for an internal combustion engine configuration 299, said engine configuration 299 comprising a first tank unit 220 for holding said liquid substance and a second tank unit 250 for holding said liquid substance, a first pump unit 230 for providing liquid substance from said first tank unit 220 to said second tank unit250, a second pump unit 270 for providing liquid substance from said second tank unit 250 for consumption within said engine configuration 299. The method comprises a first method step s310.
The method step s310 comprises the step of supplying fuel substance to said second tank unit 250 from said first tank unit 220 by means of said first pump unit 230. Hereby operation of said first pump unit 230 is controlled by said first control unit 200. The provision of said fuel substance to said second tank 250 unit may be controlled in a number of different ways by means of said first pump unit 230 and said first control unit 200.
According to a first example said first pump unit 230 is controlled to operate during a predetermined time period, e.g. 2 minutes, at a certain pump rate/rpm. By pumping said fuel substance to said second fuel tank 250 accordingly it is ensured that said second fuel tank 250 is substantially filled or completely filled.
According to a second example said first pump unit 230 is controlled to operate, i.e. providing said fuel substance to said second tank unit 250, until it is determined that said second tank unit 250 is completely filled. One way of determining that said second tank unit 250 is substantially filled or completely filled may be performed by means of a mass flow sensor provided at said second return passage P251. Whenever said second leak flow rh2leak is detected, it may be determined that said second fuel tank 250 is substantially full or completely full. Another way of determining that said second tank unit 250 is substantially filled or completely filled may be performed by means of said level sensor 235. If said first pump unit 230 is operating and thus is providing said fuel substance to said second tank unit 250 and a fuel level LI is substantially constant, this may be taken as an indication of that said second fuel tank 250 is substantially filled or completely filled [ Image available on "Original document" leak is equal to said first mass flow valueImage available on "Original document" ).
According to a third example said first pump unit 230 is controlled to operate, i.e. providing said fuel substance to said second tank unit 250, until it is determined that said second tank unit 250 is substantially filled or completely filled. Hereby said first pump unit 230 is controlled to provide a certain predetermined volume of said fuel substance to said second tank unit 250. Hereby said first mass flow sensor unit 235 is continuously detecting a fuel substance mass flow value Image available on "Original document" and when it is determined that said predetermined volume has been supplied it is determined that said second tank unit 250 is substantially filled or completely filled.
According to a fourth example said first pump unit 230 is controlled to operate, i.e. providing said fuel substance to said second tank unit 250, until it is determined that said second tank unit 250 is filled to a certain predetermined level L2. Said predetermined level L2 may be any suitable level, e.g. corresponding to 25%, 50%, 75% or 100% of the total volume of the second tank unit 250.
After the step s310 a subsequent step s320 is performed.
The method step s320 comprises the step of continuously determining a mass flow Image available on "Original document" of said liquid substance taken from said second tank unit 250 for consumption within said engine configuration 299. This may be performed by means of said first control unit 200. Hereby it may continuously be determined the amount of fuel which is consumed by the engine of the combustion engine configuration 299. Alternatively, in case said liquid substance comprises a reducing agent for emission control and said engine configuration refers to an emission pipe system, it may continuously be determined the amount of reducing agent which is provided to said emission pipe system.
The method step s320 may comprise the step of continuously determining a consumed amount Vc of said liquid substance provided in accordance with the control unit 200 for operating said engine configuration 299. This may be performed by continuously determining said mass flow Image available on "Original document" by means of said second mass flow sensor unit 285 or continuously determining a consumed amount Vc of said liquid substance on the basis of operation of said second pump unit 270. By continuously determining an amount of return liquid substance not included in said consumption but provided back to said second tank unit 250, i.e. by the mass flow in said return passage P291, said consumed amount Vc of said liquid substance may be determined accordingly. The method step s320 may also comprise the step of determining a prevailing remaining amount of liquid substance in said second tank unit 250 based on the determined mass flowImage available on "Original document" .
After the method step s320 a subsequent method step s330 is performed.
The method step s330 comprises the step of determining if said determined consumed amount Vc of said liquid substance is larger than a predetermined threshold value TH. This is comparable with determining if the determined prevailing volume of said liquid substance stored in said second tank unit 250 is below a certain predetermined volume/level. Said predetermined volume/level may be e.g. 25% of the total volume of the second tank unit 250. Said predetermined threshold value TH is set accordingly.
If said determined consumed amount Vc of said liquid substance is larger than a predetermined threshold value TH (namely YES), i.e. that the determined prevailing volume of said liquid substance in said second tank unit 250 is below said predetermined volume/level, a subsequent method step s340 is performed.
If said determined consumed amount Vc of said liquid substance is not larger than a predetermined threshold value TH (namely NO), i.e. that the determined prevailing volume of said liquid substance in said second tank unit 250 is larger/above said predetermined volume/level, said method step s320 is performed.
The method step s340 may comprise the step of supplying fuel substance to said second tank unit 250 from said first tank unit 220 by means of said first pump unit 230. Hereby operation of said first pump unit 230 is controlled by said first control unit 200. The provision of said fuel substance to said second tank 250 unit may be controlled in a number of different ways by means of said first pump unit 230 and said first control unit 200. Said second tank unit 250 may be supplied in accordance with any of the alternatives depicted with reference to the method step s310, e.g. by filling said second tank unit 250 substantially completely or to a predetermined volume/level.
According to one example the method step s340 comprises the step of: when, according to said predetermined criteria, liquid substance to said second tank unit 250 from said first tank unit 220 is provided to said second tank unit 250, filling said second tank unit 250 to a predetermined extent.
Figure 4 is a diagram of one version of a device 500. The control units 200 and 210 described with reference to Figure 2 may in one version comprise the device 500. The device 500 comprises a non-volatile memory 520, a data processing unit 510 and a read/write memory 550. The non-volatile memory 520 has a first memory element 530 in which a computer program, e.g. an operating system, is stored for controlling the function of the device 500. The device 500 further comprises a bus controller, a serial communication port, I/O means, an A/D converter, a time and date input and transfer unit, an event counter and an interruption controller (not depicted). The non-volatile memory 520 has also a second memory element 540.
The computer program P comprises routines for controlling provision of a liquid substance for an internal combustion engine configuration 299, said engine configuration 299 comprising a first tank unit 220 for holding said liquid substance and a second tank unit 250 for holding said liquid substance, a first pump unit 230 for providing liquid substance from said first tank unit 220 to said second tank unit 250, a second pump unit 270 for providing liquid substance from said second tank unit 250 for consumption within said engine configuration 299.
The computer program P may comprise routines for continuously determining a mass flow Image available on "Original document" of said liquid substance taken from said second tank unit 250 for consumption within said engine configuration 299.
The computer program P may comprise routines for continuously determining a prevailing remaining amount of said liquid substance in said second tank unit 250 based on said determined mass flow Image available on "Original document" .
The computer program P may comprise routines for controlling provision of liquid substance to said second tank unit 250 from said first tank unit 220, according to predetermined criteria relating to the prevailing remaining amount of liquid substance in said second tank unit 250.
The computer program P may comprise routines for continuously determining a consumed amount of said liquid substance provided in accordance with a control unit for 200 operating said engine configuration 299.
The computer program P may comprise routines for continuously determining a consumed amount of said liquid substance on the basis of operation of said second pump unit 270.
The computer program P may comprise routines for continuously determining an amount of return liquid substance not included in said consumption but provided back to said second tank unit 250.
The computer program P may comprise routines for controlling, when, according to said predetermined criteria, liquid substance to said second tank unit 250 from said first tank unit 220 is provided to said second tank unit 250, filling said second tank unit 250 to a predetermined extent.
The computer program P may comprise routines for controlling continuous provision of said liquid substance to said second tank unit 250 on the basis of said consumption within said engine configuration 299.
The program P may be stored in an executable form or in compressed form in a memory 560 and/or in a read/write memory 550.
Where it is stated that the data processing unit 510 performs a certain function, it means that it conducts a certain part of the program which is stored in the memory 560 or a certain part of the program which is stored in the read/write memory 550.
The data processing device 510 can communicate with a data port 599 via a data bus 515. The non-volatile memory 520 is intended for communication with the data processing unit 510 via a data bus 512. The separate memory 560 is intended to communicate with the data processing unit via a data bus 511. The read/write memory 550 is arranged to communicate with the data processing unit 510 via a data bus 514. The links L210, L235 and L285, for example, may be connected to the data port 599 (see Figure 2).
When data are received on the data port 599, they are stored temporarily in the second memory element 540. When input data received have been temporarily stored, the data processing unit 510 will be prepared to conduct code execution as described above.
Parts of the methods herein described may be conducted by the device 500 by means of the data processing unit 510 which runs the program stored in the memory 560 or the read/write memory 550. When the device 500 runs the program, methods herein described are executed.
The foregoing description of the preferred embodiments of the present invention is provided for illustrative and descriptive purposes. It is not intended to be exhaustive, nor to limit the invention to the variants described. Many modifications and variations will obviously suggest themselves to one skilled in the art. The embodiments have been chosen and described in order to best explain the principles of the invention and their practical applications and thereby make it possible for one skilled in the art to understand the invention for different embodiments and with the various modifications appropriate to the intended use.
The components and features specified above may within the framework of the invention be combined between different embodiments specified.

Claims (18)

Claims
1. A method for provision of a liquid substance for an internal combustion engine configuration (299), said engine configuration (299) comprising a first tank unit (220) for holding said liquid substance and a second tank unit (250) for holding said liquid substance, a first pump unit (230) for providing liquid substance from said first tank unit (220) to said second tank unit (250), a second pump unit (270) for providing liquid substance from said second tank unit (250) for consumption within said engine configuration (299), comprising the steps of: - continuously determining a mass flow ( Image available on "Original document" ) of said liquid substance taken from said second tank unit (250) for consumption within said engine configuration (299); - continuously determining a prevailing remaining amount of said liquid substance in said second tank unit (250) based on said determined mass flow ( Image available on "Original document" ) of said liquid substance taken from said second tank unit (250); and - according to predetermined criteria relating to the prevailing remaining amount of said liquid substance in said second tank unit (250), providing liquid substance to said second tank unit (250) from said first tank unit (220).
2. The method according to claim 1, comprising the step of: - continuously determining a consumed amount of said liquid substance provided in accordance with a control unit (200; 210; 500) for operating said engine configuration (299).
3. The method according to claim 1 or 2, comprising the step of: - continuously determining a consumed amount of said liquid substance on the basis of operation of said second pump unit (270).
4. The method according to anyone of claims 1-3, comprising the step of: - continuously determining an amount of return liquid substance not included in said consumption but provided back to said second tank unit (250).
5. The method according to anyone of claims 1-4, comprising the step of: - when, according to said predetermined criteria, liquid substance to said second tank unit (250) from said first tank unit (220) is provided to said second tank unit (250), filling said second tank unit (250) to a predetermined extent.
6. The method according to anyone of claims 1-4, comprising the step of: - continuously providing said liquid substance to said second tank unit (250) on the basis of said determined prevailing remaining amount of liquid substance in said second tank unit (250).
7. The method according to anyone of claims 1-6, wherein said liquid substance is a fuel substance or a reducing agent for emission control.
8. A system for provision of a liquid substance for an internal combustion engine configuration (299), said engine configuration (299) comprising a first tank unit (220) for holding said liquid substance and a second tank unit (250) for holding said liquid substance, a first pump unit (230) for providing liquid substance from said first tank unit (220) to said second tank unit (250), a second pump unit (270) for providing liquid substance from said second tank unit (250) for consumption within said engine configuration (299), comprising: - means (200; 210; 500; 285) arranged for continuously determining a mass flow (m2) of said liquid substance taken from said second tank unit (250) for consumption within said engine configuration (299); - means (200; 210; 500) arranged for continuously determining a prevailing remaining amount of said liquid substance in said second tank unit (250) based on said determined mass flow (m2) of said liquid substance taken from said second tank unit (250); and - means (200; 210; 500; 230) arranged for, according to predetermined criteria relating to the prevailing remaining amount of said liquid substance in said second tank unit (250), providing liquid substance to said second tank unit (250) from said first tank unit (220).
9. The system according to claim 8, comprising: - means (200; 210; 500) arranged for continuously determining a consumed amount of said liquid substance provided in accordance with a control unit (200; 210; 500) for operating said engine configuration (299).
10. The system according to claim 8 or 9, comprising: - means (200; 210; 500) arranged for continuously determining a consumed amount of said liquid substance on the basis of operation of said second pump unit (270).
11. The system according to anyone of claims 8-10, comprising: - means (200; 210; 500) arranged for continuously determining an amount of return liquid substance not included in said consumption but provided back to said second tank unit (250).
12. The system according to anyone of claims 8-11, comprising: - means (200; 210; 500; 230) arranged for filling said second tank unit (250) to a predetermined extent, when, according to said predetermined criteria, liquid substance to said second tank unit (250) from said first tank unit (220) is provided to said second tank unit
13. The system according to anyone of claims 8-11, comprising: - means (200; 210; 500; 230) arranged for continuously providing said liquid substance to said second tank unit (250) on the basis of said determined prevailing remaining amount of liquid substance in said second tank unit (250).
14. The system according to anyone of claims 8-13, wherein said liquid substance is a fuel substance or a reducing agent for emission control.
15. A vehicle (100; 110) comprising a system according to anyone of claims 8-14.
16. The vehicle (100; 110) according to claim 15, which vehicle is any from among a truck, bus or passenger car.
17. A computer program (P) for, wherein said computer program (P) comprises program code for causing an electronic control unit (200; 500) or a computer (210; 500) connected to the electronic control unit (200; 500) to perform the steps according to anyone of the claims 1-7.
18. A computer program product containing a program code stored on a computer-readable medium for performing method steps according to anyone of claims 1-7, when said computer program is run on an electronic control unit (200; 500) or a computer (210; 500) connected to the electronic control unit (200; 500).
SE1750691A 2016-07-11 2017-06-01 A system and a method for provision of a liquid substance for an internal combustion engine configuration SE542041C2 (en)

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AT406615B (en) 1998-06-05 2000-07-25 Kraeutler G M B H & Co METHOD FOR DETERMINING FUEL CONSUMPTION OR THE OPERATING CONDITION OF COMBUSTION ENGINES
US8175787B2 (en) 2008-06-04 2012-05-08 GM Global Technology Operations LLC Electrical fuel transfer pump diagnostic
WO2013093544A1 (en) 2011-12-22 2013-06-27 Renault Trucks Fuel supply system, method for controlling a fuel supply system on an automotive vehicle, and automotive vehicle adapted to such a method
SE537174C2 (en) 2013-06-13 2015-02-24 Scania Cv Ab Combustion engine fuel system, internal combustion engine with such a fuel system, vehicles with such a fuel system and a method for reducing the risk of malfunctioning fuel caused by paraffin fuel in a fuel system

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