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WO2008043323A1 - Moteur diesel - Google Patents

Moteur diesel Download PDF

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Publication number
WO2008043323A1
WO2008043323A1 PCT/DE2007/001518 DE2007001518W WO2008043323A1 WO 2008043323 A1 WO2008043323 A1 WO 2008043323A1 DE 2007001518 W DE2007001518 W DE 2007001518W WO 2008043323 A1 WO2008043323 A1 WO 2008043323A1
Authority
WO
WIPO (PCT)
Prior art keywords
gas
fuel
engine according
diesel
exhaust gas
Prior art date
Application number
PCT/DE2007/001518
Other languages
German (de)
English (en)
Inventor
Dieter Goldschmitt
Original Assignee
Goldschmitt Techmobil Ag
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 DE102006048070A external-priority patent/DE102006048070A1/de
Application filed by Goldschmitt Techmobil Ag filed Critical Goldschmitt Techmobil Ag
Priority to DE112007002649T priority Critical patent/DE112007002649A5/de
Publication of WO2008043323A1 publication Critical patent/WO2008043323A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/08—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels
    • F02D19/10—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed simultaneously using pluralities of fuels peculiar to compression-ignition engines in which the main fuel is gaseous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0626—Measuring or estimating parameters related to the fuel supply system
    • F02D19/0628—Determining the fuel pressure, temperature or flow, the fuel tank fill level or a valve position
    • F02D19/0631—Determining the fuel pressure, temperature or flow, the fuel tank fill level or a valve position by estimation, i.e. without using direct measurements of a corresponding sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
    • F02D19/0626—Measuring or estimating parameters related to the fuel supply system
    • F02D19/0634—Determining a density, viscosity, composition or concentration
    • F02D19/0636—Determining a density, viscosity, composition or concentration by estimation, i.e. without using direct measurements of a corresponding sensor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • the invention relates to a diesel engine with cylinders, in which in each cylinder a supplied via a fuel line injector is installed, whose function is the metered introduction of diesel fuel into the combustion chamber, and each cylinder each a supply line for combustion air and an exhaust gas line assigned.
  • the use of a spark plug to initiate the combustion process is not necessary and therefore not intended.
  • fuel diesel fuels are used and more recently in their stead more and more gas, so that the diesel engine is operated exclusively by the fuel gas.
  • the attachment of a spark plug is required because a self-ignition of the pure gas fuel is not possible. Designating such gas-fueled engines as diesel engines seems to be contrary to the system.
  • the object of the invention has been found to provide a solution by which the operation of a diesel engine using the gas fuel is possible without spark plugs or the same must be used.
  • Each cylinder is additionally assigned a blowing device for gas, which is supplied via a corresponding gas line and
  • the core idea of the invention is to supply the combustion chamber with a mixture of diesel and gas.
  • the proportion of diesel in this case is as low as possible, but still to choose so high that in the compression self-ignition is triggered.
  • the burning energy is provided mainly by the proportion of the gas fuel.
  • the task of the diesel component consists primarily in the generation of auto-ignition; the energy supply, however, is primarily concerned about the gas content.
  • the supply of the fuels via two conduit systems, wherein the diesel fuel is carried out in a known manner by injection at very high pressures.
  • the supply of the fuel gas is done by blowing with a low pressure compared to the diesel fuel.
  • the supply of both fuels is adjusted by means of a regulator which optimizes the mixture composition as a function of the speed and power requirement.
  • the controller receives its manipulated variable by recording the operating parameters and their evaluation by means of characteristic curves.
  • the control device is of conventional design and for a professional Knowledge of the corresponding characteristic fields easily adjustable.
  • the controller To perform its function, the controller requires information about the current speed of the motor and the current power requirement. The latter is known to occur in motor vehicles on the detection of the position of the accelerator pedal. This information is necessary and can be supplemented by further information for optimization, as explained in detail later.
  • the advantages attainable with the present invention are considerable in several respects. First, one recognizes as a significant advantage that you can dispense with the installation of spark plugs despite the use of the fuel gas. This decisive advantage is particularly evident when it comes to the need or desire to retrofit existing diesel engines. Due to the fact that the energy is provided by the fuel gas, the operation of the diesel engine is much cheaper, after the market price for gas is currently only about 1/3 of that for diesel fuel. Another key advantage is the significant improvement in emissions.
  • control devices In the usual for the control of injectors in diesel engines control devices not only the power requirements and the instantaneous speed of the engine are detected to optimize the combustion process in an advantageous manner, but also the temperature of the engine and the sucked air, the boost pressure as well as the phase measured.
  • the temperature of the charge air and the exhaust gas to capture and use to optimize the operating conditions.
  • a lambda probe is used in the prior art. It sits in the exhaust pipe and detects the content of the remaining oxygen in the exhaust gas pipe
  • Exhaust gas which is done by comparing the oxygen content of the exhaust gas with a reference value, which usually supplies the ambient air.
  • the power or torque of the diesel engine is determined by the injected amount of diesel.
  • the intake air volume is the basis of the power.
  • a lambda value from the intermediate range is targeted, that is, for example, a lambda value about 1, 2.
  • the lambda probe is an effective means available to those skilled in the art to optimize the composition of the fuel and air mixture supplied to the combustion.
  • a throttle valve is arranged in the channel of the air supply, the position of which is controllable and adjustable via the control device.
  • the throttle valve allows the amount of air supplied to throttle and thereby optimize the combustion process.
  • the amount of air and combustion air used can therefore be adapted to the respective performance and driving situations.
  • the position of the throttle valve is adjusted via the control unit. This provides a further parameter that offers significant benefits in optimizing combustion and achieving superior exhaust gas compositions.
  • the proportion of NOx can be influenced advantageously by the amount of air supplied, especially in the low speed range.
  • the invention proposes that a part of the exhaust gas be recirculated and admixed with the combustion air.
  • the result is a reduction of the O 2 content and consequently a reduction of the combustion temperature and, as a desired result, the reduction of the NO x values.
  • FIG. 1 It shows as a schematic block diagram the structure of a motor according to the invention with the corresponding supply lines.
  • the drawing is subdivided into two halves for clarity, by a vertical and dashed line, of which the left one is denoted by the letter A, indicating the supply and supply of the diesel fuel and the right half with B, with the processing and feeding of the fuel gas deal.
  • the features shown in the left half A are the same as the conventional diesel engines.
  • the here not reproduced cylinders (here: 4) is one each
  • Injector 1 assigned. Each of these nozzles 1 is controlled by the controller 2 and supplied via a fuel line with diesel. Via a fuel pump 4, the fuel is provided with a distributor 5. In the drawing, a pressure sensor and a pressure relief valve are shown. The pump 4 is supplied in a known manner via a fuel tank 6 with diesel. Although the low-pressure pump 7 serving for the promotion, the fuel filter 8 as well as the return line connected to the distributor 5 via the pressure-limiting valve and also the power supply of the regulator 2 are shown, they are of secondary interest for the understanding of the principle according to the invention.
  • the controller 2 receives information about sensors, by which the rotational speed (rotational speed sensor 9), the phase (phase sensor 10), the power requirement via the pedal travel sensor 11, the boost pressure via the boost pressure sensor 12, the air temperature (air temperature sensor 13) and the engine temperature (engine temperature sensor 14 ) and made available. These measurements serve to determine the quantity and time of the diesel fuel to be injected. Not least because the structure is of the usual kind, the sketch for the average expert is self-explanatory, so that further explanations can be omitted. In the right half of the image B, the supply of the fuel gas is shown in detail.
  • each one, not shown in the representation cylinder each assigned a blowing device 20.
  • Their control takes place via a controller 21, which is supplied with the measured values of the sensors of speed, phase, pedal travel, charge pressure and temperature of air and engine (sensors 9-14). Further information is provided by the sensor via the EGR (exhaust gas recirculation) valve 23, the throttle valve 24 in the charge air flow and the intake temperature of the gas (intake temperature sensor 25), the temperature of the charge air (charge air temperature sensor 26) and finally the exhaust gas temperature (exhaust gas temperature sensor 27). All the information serves to optimally quantify the amount of gas to be supplied to each of the injectors 20 in an optimal manner.
  • the gas supply regulator 21 just described is in communication with the diesel fuel regulator 2, so that it is possible to speak of a single regulator serving both fuel circuits.
  • a gas cylinder 28 As a reservoir for the fuel gas, a gas cylinder 28 is located. From there, the gas reaches the pressure reducer 29, from where it supplies the blowing devices 21 with gas via a line.
  • the pressure reducer 29 is adjustable and switchable via a solenoid valve.
  • Each injector 20 is supplied via the gas cylinder 28 by means of pressure reducer 29 with gas.
  • the circuit of the injection device 20, however, is done via the controller 21, which in turn has plenty of information that allow him an optimal dosing of the fuel gas.
  • each cylinder is equipped on the one hand with an injection nozzle 1 and with a blowing device 20, so that as a result a mixture of diesel and gas is introduced into the combustion chamber.
  • the result is a diesel engine that has significant advantages in terms of operating costs and emissions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

L'invention concerne un moteur diesel comprenant des cylindres dans lesquels est respectivement intégré un injecteur qui est alimenté par une conduite de carburant et qui sert à introduire du carburant diesel de manière dosée dans la chambre de combustion. Une conduite d'amenée pour l'air de combustion et une conduite d'évacuation sont respectivement associées à chaque cylindre. En outre, un dispositif d'insufflation (20) de gaz est associé à chaque cylindre, ce dispositif d'insufflation étant alimenté par une conduite de gaz correspondante. L'injection de carburant diesel et l'insufflation du mélange gazeux sont commandées par un régulateur (2, 21) auquel sont fournies des grandeurs d'entrée telle que la demande de puissance et le régime du moteur.
PCT/DE2007/001518 2006-10-11 2007-08-25 Moteur diesel WO2008043323A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112007002649T DE112007002649A5 (de) 2006-10-11 2007-08-25 Dieselmotor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006048070.8 2006-10-11
DE102006048070A DE102006048070A1 (de) 2006-09-15 2006-10-11 Dieselmotor

Publications (1)

Publication Number Publication Date
WO2008043323A1 true WO2008043323A1 (fr) 2008-04-17

Family

ID=38846772

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2007/001518 WO2008043323A1 (fr) 2006-10-11 2007-08-25 Moteur diesel

Country Status (2)

Country Link
DE (1) DE112007002649A5 (fr)
WO (1) WO2008043323A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20090968A1 (it) * 2009-06-03 2010-12-04 Landi Renzo Spa Metodo e dispositivo per alimentare un motore diesel con doppia alimentazione
EP2628922A1 (fr) * 2012-02-16 2013-08-21 MAN Truck & Bus AG Procédé destiné au fonctionnement d'un moteur à combustion interne à auto-allumage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6250260B1 (en) * 1998-10-13 2001-06-26 Jason E. Green Bi-fuel control system and assembly for reciprocating diesel engine powered electric generators
WO2001059280A1 (fr) * 2000-02-11 2001-08-16 Westport Research Inc. Procede et dispositif d'injection double de carburant dans un moteur a combustion interne
US20040149255A1 (en) * 2000-05-08 2004-08-05 Cummins Inc. Multiple operating mode engine and method of operation
EP1632665A1 (fr) * 2004-09-03 2006-03-08 Infineum International Limited Procédé pour ameliorer la puissance d'un moteur à gaz à deux combustibles

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6250260B1 (en) * 1998-10-13 2001-06-26 Jason E. Green Bi-fuel control system and assembly for reciprocating diesel engine powered electric generators
WO2001059280A1 (fr) * 2000-02-11 2001-08-16 Westport Research Inc. Procede et dispositif d'injection double de carburant dans un moteur a combustion interne
US20040149255A1 (en) * 2000-05-08 2004-08-05 Cummins Inc. Multiple operating mode engine and method of operation
EP1632665A1 (fr) * 2004-09-03 2006-03-08 Infineum International Limited Procédé pour ameliorer la puissance d'un moteur à gaz à deux combustibles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20090968A1 (it) * 2009-06-03 2010-12-04 Landi Renzo Spa Metodo e dispositivo per alimentare un motore diesel con doppia alimentazione
WO2010139572A1 (fr) * 2009-06-03 2010-12-09 Landi Renzo S.P.A. Procédé et dispositif pour fournir deux carburants à un moteur diesel
EP2628922A1 (fr) * 2012-02-16 2013-08-21 MAN Truck & Bus AG Procédé destiné au fonctionnement d'un moteur à combustion interne à auto-allumage

Also Published As

Publication number Publication date
DE112007002649A5 (de) 2009-08-06

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