WO2006135803A2 - Systeme de surveillance du carburant destine a des vehicules a moteur - Google Patents

Systeme de surveillance du carburant destine a des vehicules a moteur Download PDF

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Publication number
WO2006135803A2
WO2006135803A2 PCT/US2006/022611 US2006022611W WO2006135803A2 WO 2006135803 A2 WO2006135803 A2 WO 2006135803A2 US 2006022611 W US2006022611 W US 2006022611W WO 2006135803 A2 WO2006135803 A2 WO 2006135803A2
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
tank
metering pump
auxiliary tank
auxiliary
Prior art date
Application number
PCT/US2006/022611
Other languages
English (en)
Other versions
WO2006135803A3 (fr
Inventor
Sridar Sangamneswaran
Original Assignee
Memat, Llc
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 Memat, Llc filed Critical Memat, Llc
Publication of WO2006135803A2 publication Critical patent/WO2006135803A2/fr
Publication of WO2006135803A3 publication Critical patent/WO2006135803A3/fr

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
    • 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
    • F02D33/006—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 depending on engine operating conditions, e.g. start, stop or ambient conditions
    • 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
    • F02D41/3082—Control of electrical fuel pumps
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/007—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring the level variations of storage tanks relative to the time
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F9/00—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
    • G01F9/008—Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine where the other variable is the flight or running time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the present invention relates to fuel monitoring systems and in particular fuel monitoring systems for diesel engines of motor vehicles, such as trucks, utility vehicles and automobiles.
  • Known monitoring systems for diesel engine fuel consumption comprise two flowmeters, one installed in the supply line from the fuel pump to the engine and the second in the return line to the fuel tank. Fuel consumption is not actually measured, rather the system detects the difference in the fuel flows detected by the flowmeters and the resulting difference is recorded and/or displayed on a screen mounted in dashboard or transmitted to a remote monitoring center.
  • the flowmeters do not measure fuel consumption but the difference in the flow fuel in the supply and return lines, there are errors inherent in the design of flowmeters and these are compounded by the fact that two such flowmeters are used.
  • Conventional flowmeters do not provide an accurate determination of fuel consumed.
  • the flowmeter on the suction side of the fuel pump produces a pressure drop in the fuel supply line which may cause vaporization of fuel and thereby vapor lock in the fuel pump. Since the temperature of the fuel in the return line is much higher than the temperature of the fuel in the supply line, the mass of fuel per unit volume detected by the flowmeter in the return line is considerably less than the mass of fuel per unit volume which is detected by the flowmeter in the supply line. This results in additional consequential errors in the fuel consumption calculated by such a monitoring system. In an attempt to partially mitigate this problem, the return fuel line is sometimes cooled by means of a heat transfer line in the fuel circuit or the water circuit of the vehicle or a special refrigerating unit.
  • Max Model 710 fuel measuring system available from Max Machinery Inc. which is intended to provide test stand fuel monitoring accuracy in a portable in-vehicle unit.
  • This system is temporarily connected to the engine with the equipment mounted on a portable stand and may for example be temporarily located in the vehicle trunk.
  • This unit combines a fuel conditioning and metering package using a number of components outside the normal operating engine including a level controller, a special high accuracy flowmeter, exchanger, pump regulators and the like.
  • the level controller is hooked up to engine components by hoses to temporarily bypass the flowmeter on the supply line and to connect the fuel supply line, the fuel return line and the make-up fuel line from the main fuel tank to a level controller tank equipped with a float controlled valve in order to allow entry of make-up fuel.
  • An object of the present invention is to provide an accurate, reliable and inexpensive fuel monitoring systems for diesel engines, in particular for retrofitting motor vehicles.
  • Another object of the present invention is to provide such a fuel monitoring system which may be permanent equipment for a motor vehicle, such as a truck or lorry.
  • a fuel monitoring system for a motor vehicle diesel engine comprising an auxiliary fuel tank adapted to be connected between the fuel supply line and the fuel return line of the diesel engine.
  • a detector detects the quantity of fuel in the auxiliary tank.
  • a metering pump is connected between the auxiliary tank and the main fuel tank of the motor vehicle for supplying metered quantities of fuel to the auxiliary tank in response to the quantity of fuel in the auxiliary tank.
  • a sensor associated with the fuel pump provides an output corresponding to the amount of fuel pumped by the metering pump in a given time period, and a computing unit for registering the amount of fuel pumped in the given time period, and thereby the fuel consumption of the engine for the given time period.
  • the detector is a fuel detector mounted in the auxiliary tank for providing a signal to the metering pump when the amount of fuel in the auxiliary tank reaches a predetermined minimum value and/or a predetermined maximum value, so that the metering pump starts pumping fuel when the predetermined minimum value is reached and/or stops pumping fuel when the predetermined maximum value is reached.
  • the fuel detector is a fuel level detector and in particular a float switch.
  • the auxiliary tank is mounted on the vehicle at the same level as the main fuel tank and has the same width and height as the main fuel tank.
  • a method for monitoring fuel consumption in a motor vehicle diesel engine comprising providing an auxiliary fuel tank and connecting the auxiliary tank between the fuel supply line and the fuel return line of the diesel engine; providing a metering pump in a fuel line connected between the main tank and the auxiliary tank; detecting the quantity of fuel in the auxiliary tank; starting the metering pump when the fuel in the auxiliary tank reaches a first predetermined level and stopping the metering pump when the fuel in the auxiliary tank reaches a second predetermined level; determining the amount of fuel pumped by the pump over a given time period and thereby determining the fuel consumption by the engine over the given time period.
  • the amount of fuel pumped by the metering pump is determined at given intervals corresponding to the starting and/or stopping of the metering pump and taking into account the quantity of fuel in the auxiliary tank at those given intervals, i.e. the minimum level or the maximum level.
  • Fig. 1 is a schematic view of an embodiment of the fuel monitoring system for a motor vehicle diesel engine.
  • Fig. 2 is a schematic view of the main and auxiliary fuel tanks and the metering pump for the embodiment of Fig. 1.
  • Fig. 3 is a more detailed schematic view of the fuel pump and control and sensing units therefor.
  • the present fuel monitoring system 20 for a motor vehicle diesel engine 10 may equip the vehicle (not shown) as original equipment but is of particular interest for retrofitting existing vehicles and also when installed as permanent equipment on the vehicle.
  • Fig. 1 shows part of both the original fuel supply line 11 (in dotted line) and the original fuel return line 12 (also in dotted line) connected between the main fuel tank 21 and the diesel engine 10 as is known per se and will not be described.
  • the present fuel monitoring system 20 may as conventional be powered by the electrical system of the vehicle or by a dedicated power source.
  • the original fuel supply line 11 for carrying fuel from the main tank 21 to the engine and the original fuel return line 12 for carrying fuel to be circulated to the main tank 21 as illustrated are disconnected and/or rerouted via lines 11' and 10' (shown in solid line) from the engine to an auxiliary tank 30.
  • the auxiliary tank 30 preferably has the same cross section as the main tank 21. Also the auxiliary tank 30 is preferably located so that the bottom of the auxiliary tank 30 and the bottom of the main tank 21 are at the same height over ground or road level, whereby the engine draws fuel from the auxiliary tank 30 in the same conditions after the connection of the engine to the auxiliary tank 30 via new fuel supply line 1 1' and the connection of the auxiliary tank to the engine 10 via new fuel return line 12' as it did when the main fuel tank was connected to the engine via the original fuel supply line 11 and original fuel return line 12.
  • the auxiliary tank 30 does not affect the fluid dynamics of the fuel delivery and return system.
  • the main tank 21 and the auxiliary tank 30 are cylindrical with their axes disposed horizontally.
  • the axis of the cylindrical auxiliary fuel tank 30 is in alignment with the axis of the main fuel tank 21 and their diameters equal.
  • the auxiliary fuel tank 30 is preferably located closer to the engine 10 than the main tank 21 and thus the suction side pressure drop will be reduced.
  • the auxiliary tank 30 As the auxiliary tank 30 receives the return fuel from the engine which is at a higher temperature than the temperature of the fuel in the main fuel tank 21, the auxiliary tank 30 contains a sufficient amount of fuel at all times so that the higher temperature fuel returned to the auxiliary tank 30 does not unduly increase the temperature of the fuel in the auxiliary tank 30.
  • the auxiliary tank 30 contains a minimum of about 25-30 liters of diesel fuel at all times.
  • the temperature of fuel in the auxiliary tank 30 will in practice be substantially the same as the temperature of fuel in the main tank 21, and in practice close to ambient temperature.
  • the auxiliary tank 30 is also preferably equipped with a conventional vent 39 along with a spill or overflow device located at an upper part of the auxiliary tank 30.
  • the auxiliary tank is also equipped with a conventional drain 38.
  • a supply header 36 and a return header 35 are mounted in the auxiliary tank 30 at the same level as the supply header and the return header (not shown) in the main fuel tank which are disconnected or demounted, and sealing plugs are installed.
  • the main fuel tank 21 is connected to the auxiliary tank 30 by a fuel line 22 equipped with a metering pump 40.
  • the metering pump 40 is a positive displacement pump and preferably a piston or a diaphragm metering pump and therefore has the advantage of delivering identical volumes of fuel per stroke regardless of the suction and discharge side pressures.
  • Such piston and diaphragm metering pumps are well-known per se.
  • the metering pump 40 comprises a discharge non-return valve (not shown) connected to the auxiliary tank 30 via line 39 and a suction non-return valve (not shown) connected to the main fuel tank 21 via line 22.
  • the metering pump 40 comprises a piston pump and has a pump body 48 and a piston rod 46 connected to the piston per se.
  • the metering pump 40 has a suction port 49A and a discharge port 49B.
  • the piston is driven by a conventional pump motor 42 via a geared coupling 43 and a reduction gear mechanism 44 which drives a cam 45 which ensures reciprocal movement of the piston rod 46.
  • Sensing means are associated with the metering pump 40 for providing an output corresponding to the amount of fuel pumped by the metering pump in the given time period.
  • the amount of discharge fuel corresponds to a number of rotations of the pump drive motor shaft 42A.
  • the drive shaft is equipped with a gear wheel of the gear coupling 43, for example with 25 teeth associated with a contactless magnetic pick-up 47.
  • the gear wheel teeth selectively interrupt the magnetic flux from the magnetic pick-up, thereby producing output signals which are counted and correspond to the number of strokes of the piston and thereby to the quantity of fuel displaced by the metering pump.
  • Such a metering pump is very accurate (compared with conventional flowmeters for monitoring systems which give a fuel flow indication) and provides the measurement of the fuel actually consumed, and typically has a measurement error below 0.1% and even below 0.05 %.
  • the auxiliary tank 30 is equipped with a fuel detector unit 31, a fuel float switch 32, known per se, having a minimum and maximum levels defined by stops 33, 34.
  • a fuel float switch 32 known per se, having a minimum and maximum levels defined by stops 33, 34.
  • the float switch 31 emits a signal to a motor controller 41 for activating the metering pump 40.
  • the metering pump will then pump fuel from the main tank 21 to the auxiliary tank 30.
  • the float switch 31 emits a signal to the motor controller 41 to deactivate the metering pump.
  • the amount of fuel consumed over the operating period of the metering pump is equal to the amount of fuel pumped by the metering pump, plus or minus any change in the level of the fuel in the auxiliary fuel tank.
  • the determination of fuel consumed is made at given intervals corresponding to the starting and/or stopping of the fuel pump and thereby the known minimum or maximum level of fuel in the auxiliary tank.
  • pumped fuel is initially determined when the fuel in the auxiliary tank is at its minimum level and then determined when the fuel in the auxiliary tank is at its maximum level, the known difference between the minimum and maximum levels, typically between 2 and 4 liters, and preferably around 3 liters or no more than about 10 % of the total capacity of the auxiliary tank.
  • the amount of fuel consumed will be the amount of fuel pumped plus the amount of fuel between the minimum and maximum levels.
  • the first reading is made at the maximum level of the fuel in the auxiliary tank, then the amount of fuel consumed will be the amount of fuel pumped minus the difference of the amount of fuel between the minimum and maximum levels.
  • the measuring process repeats itself intermittently.
  • the magnetic pick-up 47 is connected to an on-board computing unit 50 such as a processor for processing the signals emitted by the magnetic pick-up 47 corresponding to fuel pumped by the fuel pump 40.
  • the amount of fuel pumped over a given interval (plus or minus any increase or decrease of the fuel in the auxiliary tank over that interval) is also displayed on a display unit (not shown) connected to the on-board computing unit 50 or transmitted to a remote location by any conventional communication system.
  • Such an interval may be a run of the vehicle between a starting point and a finishing point or a driver's shift or a set chronological period, such as an hour, a day or a week.
  • the odometer 51 of the vehicle is also connected to the computing unit 50 to provide an indication of the miles or kilometers driven over a given period of time.
  • the computing unit 50 can determine for display onboard or transmission to a remote control center the miles or kilometers per liter or the inverse, that is the liters or gallons per a given distance, say, 100 kilometers or 100 miles.
  • total fuel consumption will be the fuel pumped, e.g. 8.2 liters plus 2.65 liters.The same amount of fuel will be subtracted if the run starts at the minimum level and finishes at the maximum level. It will be appreciated that the determination of fuel consumption will be independent of the terrain or slope of the vehicle, driving conditions, the ambient temperature, the conditions of the engine, tire pressure, the vehicle load and the like. With such accurate determination of fuel consumption, it is possible to detect pilferage.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

L'invention concerne un système de surveillance du carburant et un procédé associé destinés à un moteur diesel d'un véhicule et comprenant un réservoir de carburant auxiliaire (30) conçu pour être connecté entre la conduite d'alimentation de carburant (11, 11') et la conduite de retour de carburant (12, 12') du moteur diesel (10), un détecteur permettant de détecter la quantité de carburant dans le réservoir auxiliaire (30), une pompe de dosage (40) conçue pour être connectée entre le réservoir auxiliaire (30) et le réservoir de carburant principal (21) du véhicule à moteur, aux fins d'alimentation des quantités dosées de carburant dans le réservoir auxiliaire (30), en réponse à des changements de quantité de carburant dans le réservoir auxiliaire (30), une sortie correspondant à la quantité de carburant pompée par la pompe de dosage (40) pendant une période donnée étant détectée et une unité de calcul déterminant la quantité du carburant dosée déplacée par la pompe de dosage (40) pendant une période donnée et, par conséquent, la consommation de carburant du moteur pendant une période donnée.
PCT/US2006/022611 2005-06-09 2006-06-09 Systeme de surveillance du carburant destine a des vehicules a moteur WO2006135803A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US68876305P 2005-06-09 2005-06-09
IN709CH2005 2005-06-09
IN709/CHE/2005 2005-06-09
US60/688,763 2005-06-09

Publications (2)

Publication Number Publication Date
WO2006135803A2 true WO2006135803A2 (fr) 2006-12-21
WO2006135803A3 WO2006135803A3 (fr) 2007-03-01

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PCT/US2006/022611 WO2006135803A2 (fr) 2005-06-09 2006-06-09 Systeme de surveillance du carburant destine a des vehicules a moteur

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Country Link
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008080691A1 (fr) * 2006-12-28 2008-07-10 Robert Bosch Gmbh Dispositif de dosage d'agent de réduction liquide
WO2009121644A1 (fr) * 2008-04-02 2009-10-08 Robert Bosch Gmbh Dispositif de dosage d'un agent de réduction liquide
EP2161439A1 (fr) 2008-09-09 2010-03-10 Paul Cathelain Procédé d'assistance et/ou de contrôle et/ou de régulation de la consommation d'un moteur thermique
WO2012093370A1 (fr) 2011-01-05 2012-07-12 Noam Levine Débitmètre pour fluide
CN102996304A (zh) * 2013-01-06 2013-03-27 云南云岭高速公路桥梁工程有限公司 工程机械燃油预过滤装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5445018A (en) * 1994-01-27 1995-08-29 Intek, Inc. System and method for measuring the rate of fuel comsumption of an internal combustion engine
US6301958B1 (en) * 1998-06-05 2001-10-16 KRäUTLER GESELLSCHAFT MBH & CO. Process for determining the fuel consumption or the operating status of combustion engines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5445018A (en) * 1994-01-27 1995-08-29 Intek, Inc. System and method for measuring the rate of fuel comsumption of an internal combustion engine
US6301958B1 (en) * 1998-06-05 2001-10-16 KRäUTLER GESELLSCHAFT MBH & CO. Process for determining the fuel consumption or the operating status of combustion engines

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008080691A1 (fr) * 2006-12-28 2008-07-10 Robert Bosch Gmbh Dispositif de dosage d'agent de réduction liquide
CN101573515B (zh) * 2006-12-28 2012-10-10 罗伯特·博世有限公司 用于计量液态还原剂的装置
US9494069B2 (en) 2006-12-28 2016-11-15 Robert Bosch Gmbh Device for metering a liquid reducing agent
WO2009121644A1 (fr) * 2008-04-02 2009-10-08 Robert Bosch Gmbh Dispositif de dosage d'un agent de réduction liquide
EP2161439A1 (fr) 2008-09-09 2010-03-10 Paul Cathelain Procédé d'assistance et/ou de contrôle et/ou de régulation de la consommation d'un moteur thermique
FR2935755A1 (fr) * 2008-09-09 2010-03-12 Paul Cathelain Procede d'assistance et/ou de controle et/ou de regulation de la consommation d'un moteur thermique
WO2012093370A1 (fr) 2011-01-05 2012-07-12 Noam Levine Débitmètre pour fluide
EP2661412A1 (fr) * 2011-01-05 2013-11-13 Noam Levine Débitmètre pour fluide
EP2661412A4 (fr) * 2011-01-05 2014-10-08 Noam Levine Débitmètre pour fluide
US10240590B2 (en) 2011-01-05 2019-03-26 Fize Research Ltd. Pump based fluid flow meter
CN102996304A (zh) * 2013-01-06 2013-03-27 云南云岭高速公路桥梁工程有限公司 工程机械燃油预过滤装置

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