DE10340160B4 - Method for controlling a high pressure fuel injection system as a common rail injection system and high pressure fuel injection system - Google Patents
Method for controlling a high pressure fuel injection system as a common rail injection system and high pressure fuel injection system Download PDFInfo
- Publication number
- DE10340160B4 DE10340160B4 DE2003140160 DE10340160A DE10340160B4 DE 10340160 B4 DE10340160 B4 DE 10340160B4 DE 2003140160 DE2003140160 DE 2003140160 DE 10340160 A DE10340160 A DE 10340160A DE 10340160 B4 DE10340160 B4 DE 10340160B4
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- Prior art keywords
- fuel
- pressure
- injection system
- injection
- heating element
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N19/00—Starting aids for combustion engines, not otherwise provided for
- F02N19/02—Aiding engine start by thermal means, e.g. using lighted wicks
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
- F02D41/064—Introducing corrections for particular operating conditions for engine starting or warming up for starting at cold start
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
-
- 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
- F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
- F02M53/02—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means with fuel-heating means, e.g. for vaporising
-
- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/60—Fuel-injection apparatus having means for facilitating the starting of engines, e.g. with valves or fuel passages for keeping residual pressure in common rails
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Verfahren zur Steuerung eines Kraftstoff-Hochdruckeinspritzsystems als Common-Rail Einspritzsystem einer Brennkraftmaschine, wobei das Kraftstoff-Hochdruckeinspritzsystem wenigstens einen Kraftstoff-Hochdruckspeicher als Kraftstoff-Rail aufweist, in den Kraftstoff mit einer motormechanisch gekoppelten Kraftstoff-Hochdruckpumpe gefördert wird, der von dort gesteuerten, jeweils einem Zylinder zugeordneten Einspritzventilen zugeführt wird, mit wenigstens einem steuerbaren Heizelement im Kraftstoff-Hochdruckspeicher zur steuerbaren Erwärmung des Kraftstoffs, dadurch gekennzeichnet, dass zum Brennkraftmaschinenstart vor dem Brennkraftmaschinenanlauf bei noch nicht laufender Kraftstoff-Hochdruckpumpe (4) der Kraftstoff im hermetisch geschlossenen Raum des Kraftstoff-Hochdruckspeichers (3) mittels des wenigstens einen Heizelements (12) für einen thermischen Druckaufbau im Kraftstoff vorerwärmt wird und anschließend der Brennkraftmaschinenanlauf aktiviert wird, und dass bei einer Betätigung eines Startbetätigungselements, insbesondere eines Zündschlüssels, zuerst das wenigstens eine Heizelement (12) angesteuert wird, und dass nach einer vorgegebenen Aufheizzeit und/oder eines mittels eines Drucksensors (14) ermittelten Kraftstoffdrucks der Anlasser (7) und/oder die Einspritzventile (10) selbsttätig angesteuert werden.Method for controlling a high-pressure fuel injection system as a common-rail injection system of an internal combustion engine, wherein the fuel high-pressure injection system has at least one fuel high-pressure accumulator as a fuel rail is fed into the fuel with a motor-mechanically coupled high-pressure fuel pump, which controlled from there, respectively a fuel injector associated with a cylinder, with at least one controllable heating element in the fuel high-pressure accumulator for controllable heating of the fuel, characterized in that for the engine start before the engine start with not yet running high-pressure fuel pump (4) of the fuel in the hermetically sealed space of the fuel High-pressure accumulator (3) by means of the at least one heating element (12) for a thermal pressure build-up in the fuel is preheated and then the engine start is activated, and that at a Betäti supply of a starting actuating element, in particular an ignition key, first the at least one heating element (12) is activated, and that after a predetermined heating time and / or a fuel pressure determined by a pressure sensor (14) the starter (7) and / or the injection valves (10) be controlled automatically.
Description
Die Erfindung betrifft ein Verfahren zur Steuerung eines Kraftstoff-Hochdruckeinspritzsystems als Common-Rail Einspritzsystem nach dem Oberbegriff des Anspruchs 1 sowie ein Kraftstoff-Hochdruckeinspritzsystem als Common-Rail Einspritzsystem nach dem Oberbegriff des Anspruchs 5.The invention relates to a method for controlling a high-pressure fuel injection system as a common-rail injection system according to the preamble of claim 1 and to a high-pressure fuel injection system as a common-rail injection system according to the preamble of claim 5.
In einer bekannten Anordnung (US Statutory Invention Registration H1, 820) ist an einer Mehrzylinder-Brennkraftmaschine ein Kraftstoff-Hochdruckspeicher als Kraftstoff-Rail angebracht. Der Kraftstoff-Hochdruckspeicher ist einerseits mit einer in üblicher Weise motormechanisch gekoppelten Kraftstoff-Hochdruckpumpe verbunden und andererseits über Einspritzleitungen mit den Zylindern zugeordneten, steuerbaren Einspritzventilen hydraulisch verbunden. Zudem sind im Kraftstoff-Hochdruckspeicher ein steuerbares elektrisches Heizelement sowie ein Temperatursensor angebracht, welcher an eine Steuereinheit zur Steuerung des Heizelements angeschlossen ist.In a known arrangement (US Statutory Invention Registration H1, 820), a fuel high-pressure accumulator is mounted as a fuel rail on a multi-cylinder internal combustion engine. The high-pressure fuel accumulator is on the one hand connected to a motor-mechanically coupled fuel high pressure pump in the usual way and on the other hand hydraulically connected via injection lines with the cylinders associated, controllable injectors. In addition, a controllable electrical heating element and a temperature sensor are mounted in the fuel high-pressure accumulator, which is connected to a control unit for controlling the heating element.
Das Heizelement wird hier bei niedrigen Umgebungstemperaturen während der Warmlaufphase der Brennkraftmaschine aktiviert, um durch eine Temperaturerhöhung des Kraftstoffs dessen Viskosität zu reduzieren. Damit können das Einspritzverhalten und die Verbrennung verbessert werden, was in der Warmlaufphase der Brennkraftmaschine zu höherer Motorleistung und qualitativ verbesserten Abgasen führen kann.The heating element is activated here at low ambient temperatures during the warm-up phase of the internal combustion engine in order to reduce its viscosity by increasing the temperature of the fuel. Thus, the injection behavior and the combustion can be improved, which can lead to higher engine power and qualitatively improved exhaust gases in the warm-up phase of the internal combustion engine.
Problematisch ist sowohl bei einer solchen Anordnung als auch bei Common-Rail Einspritzsystemen ohne Heizelement im Kraftstoff-Rail der Start der Brennkraftmaschine insbesondere bei tiefen Umgebungstemperaturen: Die Brennkraftmaschine kann ersichtlich nur anspringen, wenn im Kraftstoff-Hochdruckspeicher, d. h. im Kraftstoff-Rail, der Kraftstoff-Hochdruck aufgebaut ist. Dazu muss die motormechanisch gekoppelt angetriebene Kraftstoff-Hochdruckpumpe durch eine Ansteuerung des elektrischen Anlassers und einen Motoranlauf über eine bestimmte Zeit aktiviert werden, bis der erforderliche Hochdruck erreicht ist. Diese Vorlaufzeit vor dem Anspringen der Brennkraftmaschine zum Druckaufbau mit Hilfe der motormechanisch gekoppelten Kraftstoff-Hochdruckpumpe war bisher zwangsläufig erforderlich, wobei das Anspringverhalten bei tiefen Temperaturen durch hohe Kraftstoffviskositäten in bekannter Weise ohnehin problematisch ist.The problem is both in such an arrangement as well as in common-rail injection systems without heating element in the fuel rail, the start of the engine especially at low ambient temperatures: The engine can obviously only start if in the high-pressure fuel storage, d. H. in the fuel rail, the fuel high pressure is built up. For this purpose, the engine mechanically coupled driven high-pressure fuel pump must be activated by a control of the electric starter and a motor start for a certain time until the required high pressure is reached. This lead time before the start of the engine to build up pressure with the help of the engine mechanically coupled high-pressure fuel pump was previously inevitably required, the light-off at low temperatures by high fuel viscosities in a known manner is already problematic.
Bei einer weiter bekannten Brennkraftmaschine mit einem Common-Rail Einspritzsystem (
Aus der
Aufgabe der Erfindung ist es ein Verfahren und ein Kraftstoff-Hochdruckeinspritzsystem als Common-Rail Einspritzsystem zur Verfügung zu stellen, womit ein vereinfachter und besserer Brennkraftmaschinenstart ermöglicht wird. Diese Aufgabe wird hinsichtlich des Verfahrens mit den Merkmalen des Anspruchs 1 gelöst.The object of the invention is to provide a method and a high-pressure fuel injection system as a common-rail injection system, whereby a simplified and better engine start is made possible. This object is achieved in terms of the method with the features of claim 1.
Gemäß Anspruch 1 wird zum Brennkraftmaschinenstart vor dem Brennkraftmaschinenanlauf bei noch nicht angelaufener Brennkraftmaschine und damit noch nicht laufender Kraftstoff-Hochdruckpumpe der Kraftstoff im hermetisch geschlossenen Raum des Kraftstoff-Hochdruckspeichers mittels des wenigstens einen Heizelements für einen thermischen Druckaufbau im Kraftstoff vorerwärmt und vorgeheizt. Anschließend wird dann der Brennkraftmaschinenanlauf aktiviert. Damit werden bereits vor dem Anlauf der Brennkraftmaschine optimale Bedingungen für einen Brennkraftmaschinenstart im Kraftstoff-Hochdruckspeicher hergestellt, in dem eine thermische Druckerhöhung aufgebaut wird. Diese Druckerhöhung muss nicht wie bisher durch einen ungünstigen Brennkraftmaschinenvorlauf und einen Anlauf der motormechanisch gekoppelten Kraftstoff-Hochdruckpumpe vor dem Anspringen der Brennkraftmaschine herbeigeführt werden. Zudem wird durch die Aufheizung des Kraftstoffs dessen Viskosität schon vor der ersten Einspritzung reduziert, so dass bereits bei der ersten Einspritzung durch hohen Kraftstoffdruck und vorgeheizten Kraftstoff optimierte Verbrennungsverhältnisse vorliegen. Dadurch springt die Brennkraftmaschine beim Start sofort auch bei tiefen Umgebungstemperaturen an mit sofortiger guter Motorleistung und guter Abgasqualität.According to claim 1, the fuel in the hermetically sealed space of the fuel high-pressure accumulator is preheated by the at least one heating element for a thermal pressure build-up in the fuel and preheated to the engine start before starting the engine at not yet started engine and thus not running fuel high pressure pump. Subsequently, the engine startup is then activated. Thus, optimal conditions for an engine start in the high-pressure fuel storage are already made before the start of the internal combustion engine, in which a thermal pressure increase is established. This pressure increase does not have to be brought about as hitherto by an unfavorable internal combustion engine advance and a startup of the engine-mechanically coupled high-pressure fuel pump before the internal combustion engine starts. In addition, by the heating of the fuel whose viscosity is reduced even before the first injection, so that already in the first injection by high fuel pressure and preheated fuel optimized combustion conditions are present. As a result, the internal combustion engine jumps immediately at start even at low Ambient temperatures with immediate good engine performance and good exhaust quality.
Gemäß Anspruch 2 soll nach der Kraftstoff-Vorerwärmung der Brennkraftmaschinenanlauf und -start durch eine Ansteuerung des elektrischen Anlassers und einer entsprechenden Einspritzventilansteuerung erfolgen. Da durch die Kraftstoff-Vorerwärmung der Hochdruckaufbau im Kraftstoff erfolgt ist und insbesondere bei tiefen Temperaturen die Viskosität des Kraftstoffs reduziert ist, kann bei guten Startverhalten der elektrische Anlasser vergleichsweise weniger stark dimensioniert werden, was zu Gewichts- und Kostenvorteilen führt.According to
Gemäß Anspruch 3 ist es in einer besonders bevorzugten Ausführung gegebenenfalls auch möglich auf den elektrischen Anlasser ganz zu verzichten und den Brennkraftmaschinenstart ausschließlich durch Ansteuerung der Einspritzventile nach der Kraftstoff-Verwärmung durchzuführen. Durch die mittels der Kraftstoff-Vorerwärmung optimale Startvorbereitung kann die Brennkraftmaschine ohne zusätzliche Anlasserhilfe sofort anspringen.According to
Um sicherzustellen, dass während der Kraftstoff-Vorerwärmung der Kraftstoff-Hochdruckspeicher für den Hochdruckaufbau sicher hermetisch geschlossen ist und kein Druckverlust gegebenenfalls über die (noch nicht laufende) Kraftstoff-Hochdruckpumpe erfolgt soll gemäß Anspruch 4 dieser in der Verbindung zur Kraftstoff-Rail ein steuerbares Absperrventil und/oder ein Rückschlagventil zugeordnet werden.To ensure that during the fuel preheating of the fuel high-pressure accumulator for the high-pressure construction is securely closed hermetically and no pressure loss via the (not yet running) high-pressure fuel pump should be according to claim 4 in the connection to the fuel rail, a controllable shut-off valve and / or a check valve are assigned.
Erfindungsgemäß wird bei einem Startvorgang ein Startbetätigungselement, insbesondere ein Zündschlüssel betätigt, wodurch zuerst während der Kraftstoffvorheizzeit das wenigstens eine Heizelement angesteuert wird. Danach werden der Anlasser und/oder die Einspritzventile über die Steuereinheit selbsttätig angesteuert. Das Ende der Aufheizzeit kann dabei zeitgesteuert oder in Abhängigkeit vorgebbarer Schwellwerte für die Kraftstofftemperatur und/oder den Kraftstoffdruck gesteuert werden.According to the invention, a starting actuating element, in particular an ignition key, is actuated during a starting process, whereby the at least one heating element is first activated during the fuel preheating time. Thereafter, the starter and / or the injectors are controlled automatically via the control unit. The end of the heating time can be controlled in time or as a function of predefinable threshold values for the fuel temperature and / or the fuel pressure.
Die erfindungsgemäße Aufgabe wird hinsichtlich des Kraftstoffhochdruckeinspritzsystems als Common-Rail Einspritzsystem mit den Merkmalen des Anspruchs 5 gelöst, wobei die weiteren Unteransprüche zweckmäßige Weiterbildungen beinhalten.The object of the invention is achieved with regard to the high-pressure fuel injection system as a common-rail injection system with the features of claim 5, wherein the other dependent claims include expedient developments.
Anhand einer Zeichnung wird die Erfindung näher erläutert.Reference to a drawing, the invention is explained in detail.
Es zeigen:Show it:
In
Jedem Zylinder der Brennkraftmaschine
Des weiteren sind an der Kraftstoff-Rail
In
Bei dem erfindungsgemäßen Verfahren wird zum Brennkraftmaschinenstart vor dem Brennkraftmaschinenanlauf der Kraftstoff im hermetisch geschlossenen Raum des Kraftstoff-Hochdruckspeichers
Claims (8)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003140160 DE10340160B4 (en) | 2003-09-01 | 2003-09-01 | Method for controlling a high pressure fuel injection system as a common rail injection system and high pressure fuel injection system |
PCT/EP2004/009602 WO2005024224A1 (en) | 2003-09-01 | 2004-08-28 | Method for controlling a fuel high-pressure injection system serving as a common rail injection system, and a fuel high-pressure injection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003140160 DE10340160B4 (en) | 2003-09-01 | 2003-09-01 | Method for controlling a high pressure fuel injection system as a common rail injection system and high pressure fuel injection system |
Publications (2)
Publication Number | Publication Date |
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DE10340160A1 DE10340160A1 (en) | 2005-04-07 |
DE10340160B4 true DE10340160B4 (en) | 2013-08-01 |
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DE2003140160 Expired - Fee Related DE10340160B4 (en) | 2003-09-01 | 2003-09-01 | Method for controlling a high pressure fuel injection system as a common rail injection system and high pressure fuel injection system |
Country Status (2)
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DE (1) | DE10340160B4 (en) |
WO (1) | WO2005024224A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014215433A1 (en) * | 2014-08-05 | 2016-02-11 | Mahle International Gmbh | Starting method for an internal combustion engine |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BRPI0504047C1 (en) | 2005-09-12 | 2007-07-31 | Fiat Automoveis Sa | cold start auxiliary system for alcohol and flex engines with inlet air and alcohol heating |
DE602008004642D1 (en) | 2008-07-03 | 2011-03-03 | Continental Automotive Gmbh | Liquid injection arrangement |
CN104405549B (en) * | 2014-09-28 | 2017-09-29 | 长城汽车股份有限公司 | Engine |
DE102020107988A1 (en) | 2020-03-24 | 2021-09-30 | Bayerische Motoren Werke Aktiengesellschaft | System and method for preheating a fuel in an internal combustion engine of a motor vehicle |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2846995A (en) * | 1957-04-08 | 1958-08-12 | United Aircraft Prod | Engine starting system |
DE3919589C1 (en) * | 1989-06-15 | 1990-05-10 | Georg 8227 Siegsdorf De Koch-Theinl | Diesel motor fuel transport arrangement - has viscosity measuring appts. between fuel injection and delivery pumps and switches on heaters according to viscosity-dependent temp. |
USH1820H (en) * | 1998-12-22 | 1999-12-07 | Caterpillar Inc. | Method for heating actuating fluid in a fuel system |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4665881A (en) * | 1981-12-28 | 1987-05-19 | Ford Motor Company | Heated fuel injection system |
JPH08338339A (en) * | 1995-06-15 | 1996-12-24 | Isuzu Motors Ltd | Diesel engine |
DE19714488C1 (en) * | 1997-04-08 | 1998-09-03 | Siemens Ag | Fuel injection system for IC engine, particularly diesel engine |
DE19918227B4 (en) * | 1999-04-22 | 2006-04-06 | Daimlerchrysler Ag | Otto-direct-injection engine |
DE19949812A1 (en) * | 1999-10-15 | 2001-04-19 | Daimler Chrysler Ag | Procedure for operation of common rail IC engine has by supply of thermal energy, temperature of fuel increased above boiling point of fuel when piston is at TDC |
DE10045753A1 (en) * | 2000-09-15 | 2002-03-28 | Daimler Chrysler Ag | Heating device for preheating IC engine intake air, has housing with a cylindrical portion provided with slits along the flow direction of suction air and the transition region leading to the base |
-
2003
- 2003-09-01 DE DE2003140160 patent/DE10340160B4/en not_active Expired - Fee Related
-
2004
- 2004-08-28 WO PCT/EP2004/009602 patent/WO2005024224A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2846995A (en) * | 1957-04-08 | 1958-08-12 | United Aircraft Prod | Engine starting system |
DE3919589C1 (en) * | 1989-06-15 | 1990-05-10 | Georg 8227 Siegsdorf De Koch-Theinl | Diesel motor fuel transport arrangement - has viscosity measuring appts. between fuel injection and delivery pumps and switches on heaters according to viscosity-dependent temp. |
USH1820H (en) * | 1998-12-22 | 1999-12-07 | Caterpillar Inc. | Method for heating actuating fluid in a fuel system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014215433A1 (en) * | 2014-08-05 | 2016-02-11 | Mahle International Gmbh | Starting method for an internal combustion engine |
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Publication number | Publication date |
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DE10340160A1 (en) | 2005-04-07 |
WO2005024224A1 (en) | 2005-03-17 |
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