DE4005906A1 - Variable-compression IC piston - has sliding crown and has filter in oil passage to control chambers - Google Patents

Variable-compression IC piston - has sliding crown and has filter in oil passage to control chambers

Info

Publication number
DE4005906A1
DE4005906A1 DE19904005906 DE4005906A DE4005906A1 DE 4005906 A1 DE4005906 A1 DE 4005906A1 DE 19904005906 DE19904005906 DE 19904005906 DE 4005906 A DE4005906 A DE 4005906A DE 4005906 A1 DE4005906 A1 DE 4005906A1
Authority
DE
Germany
Prior art keywords
piston
connecting rod
control chambers
variable
oil
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Withdrawn
Application number
DE19904005906
Other languages
German (de)
Inventor
Peter Kemnitz
Wolfgang Bierkant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle GmbH
Original Assignee
Mahle GmbH
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 Mahle GmbH filed Critical Mahle GmbH
Priority to DE19904005906 priority Critical patent/DE4005906A1/en
Publication of DE4005906A1 publication Critical patent/DE4005906A1/en
Withdrawn legal-status Critical Current

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
    • F02B75/00—Other engines
    • F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F02B75/044—Engines with variable distances between pistons at top dead-centre positions and cylinder heads by means of an adjustable piston length
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/10—Lubricating systems characterised by the provision therein of lubricant venting or purifying means, e.g. of filters

Abstract

The variable-compression trunk-type piston is for IC engines. It incorporates a crown sliding on a portion coupled to the connecting rod under the action of control chambers supplied with oil, the latter being delivered via the connecting rod and gudgeon pin, or via a shoe working between rod and piston. A safety filter is contained in the oil supply passage upstream of the chambers, in the rod, gudgeon pin, shoe or piston. USE/ADVANTAGE - IC engine with variable compression ratio piston. No risk of blockage by particles in narrowest portions of passage.

Description

Die Erfindung betrifft einen Tauchkolben mit varia­ bler Kompressionshöhe für Verbrennungsmotoren nach dem Oberbegriff des Anspruchs 1.The invention relates to a plunger with varia compression height for internal combustion engines the preamble of claim 1.

Bei derartigen Tauchkolben muß das die Steuerkammern beaufschlagende Öl vor, zwischen und/oder hinter den Steuerkammern angebrachte Ventile und Drosselstellen mit teilweise extrem engen Strömungsquerschnitten passieren. Hierdurch ist leicht die Gefahr eines Ver­ stopfens dieser Strömungsengstellen durch feste Par­ tikel in dem Öl gegeben.With such plungers, the control chambers must oil in front of, between and / or behind the Control chambers fitted valves and throttling points with sometimes extremely narrow flow cross sections happen. This easily runs the risk of ver plugging these flow restrictions by fixed par given in the oil.

Diese Gefahr zu verringern, ist die Aufgabe der vor­ liegenden Erfindung.Reducing this risk is the task of the front lying invention.

Gelöst wird diese Aufgabe durch den Einsatz eines Si­ cherheitsfilters in einem der in dem kennzeichnenden Teil des Anspruchs 1 angegebenen Bauteile.This task is solved by using an Si safety filter in one of the characteristic ones Part of claim 1 specified components.

Baulich besonders geeignet für den Einsatz eines sol­ chen Filters ist der Kolbenbolzen.Particularly suitable for the use of a sol The filter is the piston pin.

Claims (2)

1. Tauchkolben mit variabler Kompressionshöhe für Verbrennungsmotoren, bei dem zur Variierung der Kompressionshöhe zumindest ein Teil des Kolbenbo­ dens über im Kolben und/oder Kolbenbolzen ange­ ordnete ölbeaufschlagte Steuerkammern relativ ge­ genüber dem übrigen an dem Pleuel angebundenen Teil des Kolbens verschiebbar ist und bei dem das die Steuerkammern beaufschlagende Öl durch das Pleuel und anschließend den Bolzen oder einen zwischen Pleuel und Kolben gelagerten Gleitschuh zugeführt wird, dadurch gekennzeichnet, daß stromauf der mit Öl zu beaufschlagenden Kam­ mern in einem der Bauteile Kolben, Bolzen, Gleit­ schuh oder Pleuel ein Sicherheitsfilter in der Ölzuführleitung vorgesehen ist.1. plunger with variable compression height for internal combustion engines, in which to vary the compression height at least a part of the Kolbenbo dens via arranged in the piston and / or piston pin oil-loaded control chambers relatively ge compared to the rest of the connecting rod connected part of the piston and in which the the control chambers pressurizing oil is fed through the connecting rod and then the bolt or a slide shoe mounted between the connecting rod and piston, characterized in that upstream of the oil-loaded chamber in one of the components piston, bolt, slide shoe or connecting rod, a safety filter in the Oil supply line is provided. 2. Tauchkolben nach Anspruch 1, dadurch gekennzeichnet, daß das Filter in dem Kolbenbolzen untergebracht ist.2. plunger according to claim 1, characterized, that the filter is housed in the piston pin is.
DE19904005906 1990-02-24 1990-02-24 Variable-compression IC piston - has sliding crown and has filter in oil passage to control chambers Withdrawn DE4005906A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19904005906 DE4005906A1 (en) 1990-02-24 1990-02-24 Variable-compression IC piston - has sliding crown and has filter in oil passage to control chambers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19904005906 DE4005906A1 (en) 1990-02-24 1990-02-24 Variable-compression IC piston - has sliding crown and has filter in oil passage to control chambers

Publications (1)

Publication Number Publication Date
DE4005906A1 true DE4005906A1 (en) 1991-08-29

Family

ID=6400921

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19904005906 Withdrawn DE4005906A1 (en) 1990-02-24 1990-02-24 Variable-compression IC piston - has sliding crown and has filter in oil passage to control chambers

Country Status (1)

Country Link
DE (1) DE4005906A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3511819A1 (en) * 1985-03-30 1986-10-09 Robert Bosch Gmbh, 7000 Stuttgart VALVE CONTROL DEVICE
US4785790A (en) * 1986-12-12 1988-11-22 Daimler-Benz Aktiengesellschaft Variable compression height piston arrangement
DE3714762A1 (en) * 1987-05-04 1988-11-24 Bayerische Motoren Werke Ag PISTON WITH VARIABLE HEIGHT

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3511819A1 (en) * 1985-03-30 1986-10-09 Robert Bosch Gmbh, 7000 Stuttgart VALVE CONTROL DEVICE
US4785790A (en) * 1986-12-12 1988-11-22 Daimler-Benz Aktiengesellschaft Variable compression height piston arrangement
DE3714762A1 (en) * 1987-05-04 1988-11-24 Bayerische Motoren Werke Ag PISTON WITH VARIABLE HEIGHT

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8139 Disposal/non-payment of the annual fee