DE19614462A1 - Hand=held tool with internal combustion engine with direct electronic injection - Google Patents
Hand=held tool with internal combustion engine with direct electronic injectionInfo
- Publication number
- DE19614462A1 DE19614462A1 DE1996114462 DE19614462A DE19614462A1 DE 19614462 A1 DE19614462 A1 DE 19614462A1 DE 1996114462 DE1996114462 DE 1996114462 DE 19614462 A DE19614462 A DE 19614462A DE 19614462 A1 DE19614462 A1 DE 19614462A1
- Authority
- DE
- Germany
- Prior art keywords
- hand
- implement according
- held implement
- fuel
- fuel injection
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
Classifications
-
- 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
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/02—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for hand-held tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B17/00—Chain saws; Equipment therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P1/00—Air cooling
- F01P1/02—Arrangements for cooling cylinders or cylinder heads, e.g. ducting cooling-air from its pressure source to cylinders or along cylinders
-
- 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
- F02M53/04—Injectors with heating, cooling, or thermally-insulating means
- F02M53/08—Injectors with heating, cooling, or thermally-insulating means with air cooling
-
- 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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/04—Injectors peculiar thereto
- F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P1/00—Air cooling
- F01P1/06—Arrangements for cooling other engine or machine parts
- F01P1/10—Arrangements for cooling other engine or machine parts for cooling fuel injectors or sparking-plugs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
-
- 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
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Die Erfindung betrifft ein handgeführtes Arbeitsgerät, insbesondere, Trennschleifer, Freischneidegerät o dgl., mit einem Verbrennungsmotor, vorzugsweise Zweitaktmotor mit elektronischer Direkteinspritzung des Kraftstoffs, das ein auf der Kurbelwelle angeordnetes Kühlgebläse und im Bereich des Zylinders eine Kühlluftführung, die ein Durchströmen der Kurbelwellenachse bewirkt, aufweist. The invention relates to a hand-held implement, in particular, cut-off machine, brush cutter or the like, with an internal combustion engine, preferably a two-stroke engine with electronic direct injection of the fuel that a cooling fan arranged on the crankshaft and in Area of the cylinder a cooling air duct, the one Flows through the crankshaft axis causes.
Bei der Einspritzung von Kraftstoff in den Verbrennungs motor wird versucht, diese derart durchzuführen, daß eine gute Gemischaufbereitung bei gleichzeitiger Optimierung der Abgasqualität erzielt wird, wobei der technische Auf wand in einem vertretbaren Rahmen bleiben muß.When fuel is injected into the combustion motor is attempted to do this in such a way that a good mixture preparation with simultaneous optimization the exhaust gas quality is achieved, with the technical up wall must remain within an acceptable framework.
In der Realität werden jedoch nicht alle Vorgaben gleicher maßen erreicht, so daß je nach Aufgabenstellung bestimmte Nachteile in Kauf genommen werden müssen.In reality, however, not all requirements become the same achieved so that depending on the task Disadvantages have to be accepted.
Es ist daher Aufgabe der Erfindung, gattungsgemäße Zwei taktbrennkraftmaschinen bzw. deren Kraftstoffeinspritzung zu optimieren.It is therefore an object of the invention, generic two clock internal combustion engines and their fuel injection to optimize.
Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is achieved by the features of claim 1 solved.
Dazu ist erfindungsgemäß vorgesehen, insbesondere bei Motorkettensägen, bei denen der Zylinder zur Kettenschwert längsachse stehend oder geneigt angeordnet ist, der Ansaug raum mit dem Luftfilter auf der Griffseite befindlich ist und das Kühlgebläse auf der Kurbelwelle sitzt, wobei dem Zylinder eine Kühlluftführung, die ein Durchströmen entlang der Kurbelwellenachse bewirkt, zugeordnet ist, am Zylinder angrenzend eine Trennwand vorzusehen, die den angrenzenden Ansaugraum von der Kühlluftführung trennt, und das Kraftstoffeinspritzventil oberhalb des Einlaßkanals für die angesaugte Luft im Zylinder, vorzugsweise mit Neigung zum Zylinderkopf hin, die Trennwand durchdringend, anzuordnen. This is provided according to the invention, in particular with Chainsaws where the cylinder is the chain sword arranged longitudinally or inclined, the intake space with the air filter on the handle side and the cooling fan sits on the crankshaft, the Cylinder has a cooling air duct that flows through causes along the crankshaft axis, is assigned, on Cylinder adjacent to provide a partition that the separates the adjacent intake space from the cooling air duct, and the fuel injector above the intake port for the intake air in the cylinder, preferably with Inclination towards the cylinder head, penetrating the partition, to arrange.
Vorzugsweise ist ein am Zylinder befestigter Ansaugtrakt mit dem Einlaßkanal, das Kraftstoffeinspritzventil ober halb des Einlaßkanals übergreifend und als Andruckelement für dieses ausgebildet.An intake tract attached to the cylinder is preferred with the intake port, the fuel injector upper half of the inlet channel and as a pressure element trained for this.
Nach einer bevorzugten Ausführungsform ist der Ansaugtrakt mit Stromzuführungskontakten für das elektromagnetisch gesteuerte Kraftstoffeinspritzventil ausgestattet, wobei der Ansaugtrakt die Kraftstoffzu- und/oder -abführung für das elektromagnetisch gesteuerte Kraftstoffeinspritzventil aufweisen kann.According to a preferred embodiment, the intake tract with power supply contacts for the electromagnetic controlled fuel injection valve, being the intake tract the fuel supply and / or discharge for the electromagnetically controlled fuel injector can have.
Weiterhin kann der Ansaugtrakt einen Luftfilter und/oder eine Luftführungsstrecke mit einer Anordnung zur Kühlung von Kraftstoff aufweisen.Furthermore, the intake tract can be an air filter and / or an air duct with an arrangement for cooling of fuel.
Nach einer weiteren bevorzugten Ausführungsform ist der Ansaugtrakt mit einer Kontaktleiste ausgestattet, die mit einer komplementären Kontaktleiste an einem Ansaugluft gehäuse, das auch die Trennwand zum Zylinder ausbildet, im Funktionszustand in Eingriff ist, wobei das Ansaugluftge häuse das Steuergerät für die Speisung des Verbrennungs motors aufweist.According to a further preferred embodiment, the Intake tract equipped with a contact strip that with a complementary contact strip on an intake air housing, which also forms the partition to the cylinder, in Functional state is engaged, the Ansaugluftge housing the control unit for feeding the combustion motors.
Weitere vorteilhafte Ausgestaltungen sind in den Unteran sprüchen gekennzeichnet.Further advantageous embodiments are in the Unteran sayings marked.
Nachstehend wird die Erfindung anhand einer Zeichnung näher erläutert. The invention based on a drawing explained in more detail.
Die Erfindung zeigt in einer schematischen Seitenansicht eine erfindungsgemäß ausgestaltete Motorkettensäge.The invention shows a schematic side view a motor chain saw designed according to the invention.
Die Motorkettensäge 100 ist in üblicher Weise mit einem nicht näher dargestellten Verbrennungsmotor in einem Gehäuse 11, einem Kettenschwert 12, einem Handgriff 13 und sonstigen Einrichtungen ausgestattet.The motor chain saw 100 is conventionally equipped with an internal combustion engine (not shown in more detail) in a housing 11 , a chain sword 12 , a handle 13 and other devices.
Auf der Oberseite 14 des Gehäuses 11 ragt der Zylinder 15, bestehend aus zwei Ansaugluftgehäuseteilen, nämlich aus dem Gehäusedeckel 20a und dem Gehäuseboden 20b heraus, der zum Kettenschwert 12 hin einen Auspuff 16 und zur anderen Seite hin ein Kraftstoffeinspritzventil 17 und einen Ansaugtrakt 18 trägt. Zwischen dem Zylinder 15 und dem Kraftstoffeinspritzventil 17 sowie dem Ansaugtrakt 18 befindet sich eine Schottwand 19, die durch ein Ansaugluft gehäuse 20 mit dem Einlaßkanal 15a und dem Auslaßkanal 15b und ein Kühlluftgehäuse 21 für den Zylinder 15 ausgebildet wird.On the top 14 of the housing 11 , the cylinder 15 , consisting of two intake air housing parts, namely from the housing cover 20 a and the housing base 20 b protrudes, which has an exhaust 16 towards the chain sword 12 and a fuel injection valve 17 and an intake tract 18 to the other side wearing. Between the cylinder 15 and the fuel injection valve 17 and the intake tract 18 there is a bulkhead 19 , which housing 20 is formed by an intake air with the inlet duct 15 a and the outlet duct 15 b and a cooling air housing 21 for the cylinder 15 .
Das Kraftstoffeinspritzventil 17 ist oberhalb des Ansaug trakts 18 schräg nach oben weisend angeordnet, wobei beide Einrichtungen die Trennwand 19 durchdringen.The fuel injection valve 17 is arranged above the intake tract 18 obliquely upward, both devices penetrating the partition 19 .
Im Ansaugluftgehäuse 20 ist die elektronische Steuerein heit 22 vorgesehen. Der Ansaugtrakt 18 weist einen Luft filter 23 auf.In the intake air housing 20 , the electronic control unit 22 is provided. The intake tract 18 has an air filter 23 .
Im Ansaugtrakt 18 ist weiterhin der Drosselklappenstutzen 24 angeordnet. The throttle valve connector 24 is also arranged in the intake tract 18 .
Mit dem im Bereich des Auspuffs 16 oder im Auslaßkanal 15b des Zylinders 15 angeordneten Abgassensor 25 kann für die Steuereinheit 22 die Abgastemperatur erfaßt werden.With the exhaust gas sensor 25 arranged in the area of the exhaust 16 or in the exhaust duct 15 b of the cylinder 15 , the exhaust gas temperature can be detected for the control unit 22 .
Ein optimales Betriebsverhalten wird erreicht, wenn die in der Zeichnung nicht dargestellte Kraftstoffpumpe in oder am Kraftstofftank 26, im Ansaugluftstrom 27 oder im Kühlluftstrom 28 angeordnet wird.An optimal operating behavior is achieved if the fuel pump, not shown in the drawing, is arranged in or on the fuel tank 26 , in the intake air flow 27 or in the cooling air flow 28 .
BezugszeichenlisteReference list
100 Motorkettensäge
11 Gehäuse
12 Kettenschwert
13 Handgriff
14 Oberseite
15 Zylinder
15a Einlaßkanal des Zylinders
15b Auslaßkanal des Zylinders
16 Auspuff
17 Kraftstoffeinspritzventil
18 Ansaugtrakt
19 Schottwand
20a + 20b Ansaugluftgehäuse
20a Ansaugluftgehäuse Deckel
20b Ansaugluftgehäuse Boden
21 Kühlluftgehäuse
22 elektronische Steuerung
23 Luftfilter
24 Drosselklappenstutzen
25 Abgassensor
26 Kraftstofftank
27 Ansaugluftstrom
28 Kühlluftstrom 100 chainsaw
11 housing
12 chain sword
13 handle
14 top
15 cylinders
15 a intake port of the cylinder
15 b exhaust port of the cylinder
16 exhaust
17 Fuel injection valve
18 intake tract
19 bulkhead
20 a + 20 b intake air housing
20 a intake air housing cover
20 b Intake air housing floor
21 cooling air housing
22 electronic control
23 air filter
24 throttle body
25 exhaust gas sensor
26 fuel tank
27 Intake air flow
28 Cooling air flow
Claims (23)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1996114462 DE19614462A1 (en) | 1996-04-12 | 1996-04-12 | Hand=held tool with internal combustion engine with direct electronic injection |
DE59700729T DE59700729D1 (en) | 1996-04-12 | 1997-04-14 | HAND-HELD TOOL WITH A COMBUSTION ENGINE WITH ELECTRONIC DIRECT INJECTION |
CA002251764A CA2251764A1 (en) | 1996-04-12 | 1997-04-14 | Hand-guided appliance with an internal combustion engine with direct electronic injection |
EP97919351A EP0891474B1 (en) | 1996-04-12 | 1997-04-14 | Hand-guided appliance with an internal combustion engine with direct electronic injection |
JP53673997A JP2001507632A (en) | 1996-04-12 | 1997-04-14 | Hand tool with internal combustion engine with electronic direct injection |
PCT/EP1997/001845 WO1997039228A1 (en) | 1996-04-12 | 1997-04-14 | Hand-guided appliance with an internal combustion engine with direct electronic injection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1996114462 DE19614462A1 (en) | 1996-04-12 | 1996-04-12 | Hand=held tool with internal combustion engine with direct electronic injection |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19614462A1 true DE19614462A1 (en) | 1997-10-16 |
Family
ID=7791076
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1996114462 Withdrawn DE19614462A1 (en) | 1996-04-12 | 1996-04-12 | Hand=held tool with internal combustion engine with direct electronic injection |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19614462A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006104456A1 (en) * | 2005-03-29 | 2006-10-05 | Sem Aktiebolag | Device and method for communication between a control system for small internal combustion engines and an external computer |
WO2019185548A1 (en) * | 2018-03-27 | 2019-10-03 | Husqvarna Ab | A cooling arrangement for a combustion engine |
-
1996
- 1996-04-12 DE DE1996114462 patent/DE19614462A1/en not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006104456A1 (en) * | 2005-03-29 | 2006-10-05 | Sem Aktiebolag | Device and method for communication between a control system for small internal combustion engines and an external computer |
US7953543B2 (en) | 2005-03-29 | 2011-05-31 | Sem Aktiebolag | Device and method for communication between a control system for small internal combustion engines and an external computer |
WO2019185548A1 (en) * | 2018-03-27 | 2019-10-03 | Husqvarna Ab | A cooling arrangement for a combustion engine |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8120 | Willingness to grant licenses paragraph 23 | ||
8139 | Disposal/non-payment of the annual fee |