WO2023115176A1 - Système d'alimentation en combustible pourvu d'un sous-système de filtrage de combustible - Google Patents

Système d'alimentation en combustible pourvu d'un sous-système de filtrage de combustible Download PDF

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Publication number
WO2023115176A1
WO2023115176A1 PCT/BR2022/050404 BR2022050404W WO2023115176A1 WO 2023115176 A1 WO2023115176 A1 WO 2023115176A1 BR 2022050404 W BR2022050404 W BR 2022050404W WO 2023115176 A1 WO2023115176 A1 WO 2023115176A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
filtering
dedicated
circuit
main hydraulic
Prior art date
Application number
PCT/BR2022/050404
Other languages
English (en)
Portuguese (pt)
Inventor
Anderson Cortez GONSALVES
Original Assignee
Robert Bosch Limitada
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
Priority claimed from BR102021025845-4A external-priority patent/BR102021025845A2/pt
Application filed by Robert Bosch Limitada filed Critical Robert Bosch Limitada
Publication of WO2023115176A1 publication Critical patent/WO2023115176A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • 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
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/24—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by water separating means
    • 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
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements

Definitions

  • the present invention relates to a fuel supply system provided with a filtering subsystem, applicable to internal combustion engines.
  • the design of the vehicle's low pressure circuit determines some important characteristics for the separation of water from the fuel, namely: the emulsification of water in the fuel - especially diesel -, which depends on the type of feeder pump used and the system mass flow; the average water droplet size at the filter inlet, which depends on the emulsification and the position of the filter in the circuit, upstream or downstream of the pump; and the temperature of the fuel, which influences the issues of solubility and interfacial tension mentioned below.
  • respective fuel supply/injection systems including respective fuel tanks, respective main hydraulic circuits (low pressure circuit and high pressure circuit), which include respective pumps and respective fuel filters, each of the respective systems including, in addition to the respective main circuits, respective branches (circuits) able to provide recirculation of fuel from the respective fuel tanks to the fuel tanks themselves, after crossing at least one corresponding fuel filter.
  • a motor vehicle comprising an engine and a fuel supply system to supply fuel to the engine, said supply system comprising a fuel tank, a supply line and a fuel line, which conducts the fuel between the fuel tank and the supply line, which is connected to a high-pressure pump adapted to supply the engine with fuel at high pressure.
  • the fuel system further comprises a feed pump disposed in the fuel line and adapted to pump fuel from the fuel tank into the feed line.
  • a water separating filter is arranged in the fuel line upstream of the feed pump and is adapted to separate water from the fuel.
  • the water separator filter comprises a water drain to which a drain line is connected.
  • a drain check valve is disposed in the drain line and allows only liquid flow, such as water, in one direction away from the water separating filter.
  • a return line is arranged between the supply line and the fuel tank, and a constriction is arranged in the return line. The constriction results in a lower pressure downstream of it.
  • the drain line is connected to the return line at a connection point downstream of the constriction, so that the return line and drain line form a common line between the connection point and the fuel tank.
  • the fuel system further comprises a particulate filter disposed in the fuel line between the feed pump and the feed line and adapted to filter particles from the fuel.
  • the fuel line which is the one that captures the fuel from the tank, is common to both the filtering subsystem and the supply system as a whole, for example.
  • Another objective is to describe a simple, low-cost and practical solution, applicable to already designed fuel supply systems; [025] In other words, it is the objective of the present invention to design a solution that allows the retrofit of already validated and currently produced systems;
  • a fuel supply system provided with a fuel filtering subsystem, said system being provided with a fuel tank connected to a main hydraulic circuit and at least a first fuel pump that drives fuel from the fuel tank to an engine, said main hydraulic circuit including at least a first fuel filter, said fuel supply system further comprising: at least one dedicated circuit for filtering, which includes at least one fuel line filtration that starts from the fuel tank and ends at the fuel tank; at least one dedicated fuel filter provided adjacent to said filtering line; and considering that the main hydraulic circuit and the dedicated filtering circuit are independent of each other.
  • the circuit dedicated to filtering also includes at least one control valve, at least one pump dedicated to filtering and at least one restrictor element. Still preferably, in the filtering line, said at least one restrictor element is located downstream of said at least one dedicated filtering pump which, in turn, is located downstream of said at least one dedicated fuel filter that , in turn, is found downstream of said at least one control valve.
  • the main hydraulic circuit comprises a second fuel pump, which drives fuel from the fuel tank fuel to the first fuel pump, said second fuel pump being located inside the fuel tank.
  • said main hydraulic circuit comprises a low pressure circuit and a high pressure circuit. Furthermore, said main hydraulic circuit comprises at least a first fuel filter and, preferably, at least a second fuel filter, the first and second fuel filters being located, respectively, in the low pressure circuit and in the high pressure circuit. pressure.
  • the first and second fuel filters are both in the low pressure circuit or in the high pressure circuit.
  • Figure 1 illustrates a schematic of the fuel supply system provided with a fuel filtering subsystem, according to the present invention.
  • the present invention concerns a fuel supply system provided with a fuel filtering subsystem, said system being provided with a fuel tank 13 connected to a main hydraulic circuit 10 and at least a first fuel pump 16 which drives fuel from the fuel tank 13 to an engine, said main hydraulic circuit 10 including at least a first fuel filter 14.
  • said fuel filtering subsystem comprises at least one dedicated filtering circuit 20, which includes at least one filtering line 21 that starts from the fuel tank 13 and ends ends in fuel tank 13, at least one dedicated fuel filter 25 provided next to said filtering line 21, and the main hydraulic circuit 10 and the dedicated filtering circuit 20 are independent of each other.
  • the filtering line 21 begins and ends, preferably, in the same fuel tank 13. However, depending on the vehicle model - and its physical space - it is possible that there is more than one fuel tank 13 and that the filtering line 21 starts at a fuel tank 13 and ends at another fuel tank 13.
  • the main hydraulic circuit 10 of the fuel supply system of the present invention comprises a low pressure circuit 11 and a high pressure circuit 12, both of which comprise pipes that are totally distinct from the pipe that defines the filtering line 21 and, therefore, the operation of the fuel filtering subsystem does not affect the mass flow of the low and high pressure circuits 11, 12.
  • the fuel filtration subsystem of the present invention can be adapted to any vehicle, observing the issues of physical space and power supply, representing a simple, low-cost and practical solution, applicable to fuel supply systems already designed, that is, providing a solution that allows the retrofit of systems already validated and currently produced.
  • another important advantage of the independence of the filtering subsystem is that it can be dimensioned in such a way as to cause less water emulsification in the diesel during dedicated pumping, provided by the dedicated filtering pump 26, increasing the separation efficiency of diesel water in the dedicated fuel filter 25.
  • the fuel supply system of the present invention is controlled by an ECU engine control unit, the same as controlling the first fuel pump 15.
  • the ECU engine control unit is also responsible for managing accessory devices/ aggregates, such as the starter motor, signal lamps and other subsystems (not illustrated), such as the fuel heating subsystem (not illustrated), among others, for example.
  • said ECU engine control unit receives signals from various sensors, such as an accelerator pedal 31, a tachometer 32, a pressure sensor 33 and other sensors 34, as well as being responsible for actuating various components 35 , among them at least one pressure regulating valve 36 and at least one fuel injector 37, and/or a fuel metering valve (not shown), for example.
  • the circuit dedicated to filtering 20 also includes at least one control valve 24, at least one pump dedicated to filtering 26 and at least one restrictor element 27, being that, in filtering line 21, said at least one restrictor element 27 is located downstream of said at least one dedicated filtering pump 26 which, in turn, is located downstream of said at least one dedicated fuel filter 25 which, for downstream of said at least one control valve 24 is located.
  • the section of the filtering line 21 upstream of said at least one pump dedicated to filtering 25 can be called the filtering suction line 211, while the section of the filtering line 21 downstream of said at least one pump dedicated to filtering 25 can be called the filtering return line
  • the main hydraulic circuit 10 comprises a second fuel pump 15, which drives fuel from the fuel tank 13 to the first fuel pump 16, said second fuel pump 15 being located inside the fuel tank 13.
  • the first fuel pump 16 is a high pressure pump
  • the second fuel pump 15 is a low pressure pump.
  • the main hydraulic circuit 10 comprises at least a first and a second fuel filter 14.
  • the first and second fuel filters 14 are possible, as in detail detailed follow.
  • the first and second fuel filters 14 can be found, respectively, in the low pressure circuit 11 and in the high pressure circuit 12. In a second alternative, the first and second fuel filters 14 can be found , both in the low pressure circuit 11 or in the high pressure circuit 12.
  • a third fuel filter could also be provided. In figure 1, the embodiment that includes only the first fuel filter 14 is illustrated, which is arranged in the low pressure circuit 11, between the second fuel pump 15 and the first fuel pump 16. The other embodiments are not illustrated in the figures. figures.
  • the dedicated fuel filter 25 positioned in the suction line 211 of the filtering line 21 receives the fuel from the fuel tank, under low emulsification (large water droplets, due to the low pressure in the suction), which optimizes the water separation process inside the dedicated fuel filter 25.
  • the filtered fuel returns to the interior of the fuel tank 13 through its upper part and the water removed from the fuel is retained in the dedicated fuel filter reservoir 25, which comprises a water level sensor, in order to indicate the user/driver the moment to drain the dedicated fuel filter reservoir 25, closing the control valve 24 and draining said dedicated fuel filter 25 according to the manufacturer's instructions.
  • the dedicated fuel filter reservoir 25 comprises a water level sensor, in order to indicate the user/driver the moment to drain the dedicated fuel filter reservoir 25, closing the control valve 24 and draining said dedicated fuel filter 25 according to the manufacturer's instructions.
  • the filtering process lasts depending on the fuel level in the fuel tank 13 at the end of fueling (total volume of fuel to be filtered), the ambient temperature (cold days, lower diesel-water interfacial tension, higher the number of filtration passes required) and condition of the dedicated fuel filter 25 (ideally indicated by the total running time of the vehicle, after changing said filter).
  • the fuel filtering subsystem must work independently, depending on the required filtering time, even after the end of fueling. [053] In accordance with the above, it is noted that the present invention has the following advantages, in addition to those already mentioned: continuous fuel filtering capacity (by multiple passes through the dedicated fuel filter 25) when fueling, time when the probability of contamination by water is greater; minimization of the amount of water emulsified by the fuel pump 16 after starting the vehicle (after fueling) and, consequently, less probability of water entering the fuel supply system, from the first moments of operation/functioning of the vehicle; continuous filtering capacity depending on different triggers, such as the fuel level in the fuel tank 13, ambient temperature (if the fuel level in the fuel tank 13 is low for long periods of time, there may be condensation of the water present in the air inside it) and even depending on the amount of water detected in the fuel tank 13 through specific sensors for this purpose (not shown).

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

La présente invention concerne un système d'alimentation en combustible pourvu d'un sous-système de filtrage de combustible, applicable aux moteurs à combustion interne. Le problème est résolu en : fournissant une solution suffisamment solide, efficace et fiable qui ne requiert pas de modification de la totalité du circuit hydraulique des systèmes d'alimentation en combustible déjà conçus, autrement dit, qui permet le post-équipement des systèmes déjà validés et actuellement produits. La résolution du problème consiste donc à prévoir un système d'alimentation en combustible ayant un sous-système de filtrage de combustible, ledit système étant doté d'une cuve de combustible (13) reliée à un circuit hydraulique principal (10) et au moins une pompe à combustible (16) qui entraîne le combustible provenant de la cuve à combustible (13) pour un moteur, ledit circuit hydraulique principal (10) comprenant au moins un premier filtre à combustible (14), ledit système d'alimentation en combustible comportant également au moins un circuit servant au filtrage (20), lequel comprend au moins une conduite de filtrage (21) qui commence à partir de la cuve à combustible (13) et se termine dans la cuve à combustible (13), au moins un filtre à combustible dédié (25) situé à côté de la conduite de filtrage (21), ledit circuit hydraulique principal (10) et ledit circuit servant au filtrage (20) étant indépendants l'un de l'autre.
PCT/BR2022/050404 2021-12-20 2022-10-19 Système d'alimentation en combustible pourvu d'un sous-système de filtrage de combustible WO2023115176A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR1020210258454 2021-12-20
BR102021025845-4A BR102021025845A2 (pt) 2021-12-20 Sistema de alimentação de combustível provido de subsistema de filtragem de combustível

Publications (1)

Publication Number Publication Date
WO2023115176A1 true WO2023115176A1 (fr) 2023-06-29

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PCT/BR2022/050404 WO2023115176A1 (fr) 2021-12-20 2022-10-19 Système d'alimentation en combustible pourvu d'un sous-système de filtrage de combustible

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Country Link
AR (1) AR127475A1 (fr)
WO (1) WO2023115176A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130220280A1 (en) * 2012-02-29 2013-08-29 Ford Global Technologies, Llc Diesel fuel system conditioning
US20140224215A1 (en) * 2013-02-08 2014-08-14 Martin A. Lehman Fuel filtration system
GB2521275A (en) * 2013-12-11 2015-06-17 Engym Services Ltd Apparatus and method for engine fuel systems
BR112015022121A2 (pt) * 2013-03-22 2017-07-18 Scania Cv Ab sistema de combustível para motor de combustão e um método para controlar um sistema de combustível
US20180087478A1 (en) * 2016-09-29 2018-03-29 Kubota Corporation Work machine
US20180128219A1 (en) * 2016-11-07 2018-05-10 Hyundai Motor Europe Technical Center Gmbh Fuel supply module for combustion engine and vehicle having the same
CN209875340U (zh) * 2019-04-17 2019-12-31 一汽解放汽车有限公司 一种主动柴油滤清系统
CN111927662A (zh) * 2020-08-11 2020-11-13 一汽解放汽车有限公司 一种柴油滤清系统及汽车

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130220280A1 (en) * 2012-02-29 2013-08-29 Ford Global Technologies, Llc Diesel fuel system conditioning
US20140224215A1 (en) * 2013-02-08 2014-08-14 Martin A. Lehman Fuel filtration system
BR112015022121A2 (pt) * 2013-03-22 2017-07-18 Scania Cv Ab sistema de combustível para motor de combustão e um método para controlar um sistema de combustível
GB2521275A (en) * 2013-12-11 2015-06-17 Engym Services Ltd Apparatus and method for engine fuel systems
US20180087478A1 (en) * 2016-09-29 2018-03-29 Kubota Corporation Work machine
US20180128219A1 (en) * 2016-11-07 2018-05-10 Hyundai Motor Europe Technical Center Gmbh Fuel supply module for combustion engine and vehicle having the same
CN209875340U (zh) * 2019-04-17 2019-12-31 一汽解放汽车有限公司 一种主动柴油滤清系统
CN111927662A (zh) * 2020-08-11 2020-11-13 一汽解放汽车有限公司 一种柴油滤清系统及汽车

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