EP0119135A1 - Moteur à combustion interne avec un carter à dépression - Google Patents

Moteur à combustion interne avec un carter à dépression Download PDF

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Publication number
EP0119135A1
EP0119135A1 EP84400447A EP84400447A EP0119135A1 EP 0119135 A1 EP0119135 A1 EP 0119135A1 EP 84400447 A EP84400447 A EP 84400447A EP 84400447 A EP84400447 A EP 84400447A EP 0119135 A1 EP0119135 A1 EP 0119135A1
Authority
EP
European Patent Office
Prior art keywords
negative pressure
space portion
internal combustion
combustion engine
engine
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Withdrawn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
EP84400447A
Other languages
German (de)
English (en)
Inventor
Michio Imaizumi
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.)
BOX YK
Original Assignee
BOX YK
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 BOX YK filed Critical BOX YK
Publication of EP0119135A1 publication Critical patent/EP0119135A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure

Definitions

  • the present invention relates to an internal combustion engine having a negative pressure space portion and, more particularly, to an internal combustion engine having a negative pressure space portion whereby the negative pressure space portion is formed around an output shaft of an internal combustion engine.
  • a pressure in a crankcase formed in the lower portion of an internal combustion engine e.g., a reciprocating engine is set to be substantially euqal to an atmospheric pressure:
  • a piston reciprocates in a cylinder, thereby performing the respective steps of suction, compression, explosion, and exhaust.
  • the piston is subjected to the explosion pressure and transfers the power through a connecting rod to a crankshaft as an output shaft, thereby obtaining a power due to the rotational motion of this crankshaft.
  • an internal combustion engine which is constituted as follows. Namely, a space portion is provided around at least an output shaft of the internal combustion engine and negative pressure generating means is communicated with this space portion.
  • the negative pressure generating means comprises, for example, a vacuum pump and by making this vacuum pump operative, the air in the space portion is drained to the outside, thereby enabling the pressure in the space portion to be in a desired negative pressure.
  • Figs. 1 - . 3 illustrate a first embodiment of the present invention, in which
  • Figs. 1 - 3 illustrate a first embodiment of the present ! invention.
  • a reference numeral 10 denotes a gasoline engine as an internal combustion engine; 12 indicates a spark plug; 14 is an intake valve; 16 an exhaust valve; 18 a combustion chamber; 20 a cylinder; 22 a piston adapted to be slidably moved in the cylinder 20; 24 a crankcase as a space portion provided around an output shaft; 26 a crankshaft as an output shaft; 28 a connecting rod for coupling the piston 22 with the crankshaft 26; and 30 an oil pan.
  • One end 32a of a negative pressure passageway 32 opens in and is communicated with the crankcase 24 in the lower portion of the gasoline engine 10, while the other end 32b of the negative pressure passageway 32 opens in and is communicated with a vacuum pump 34 as negative pressure generating means.
  • the vacuum pump 34 is not made operative by the piston motion of the gasoline engine 10 or by the rotational motion of the crankshaft, but it is operated by the driving force to be generated by another driving apparatus, e.g., an electric motor.
  • a reference numeral 36 represents a balance weight of the ; crankshaft 26.
  • the vacuum pump 34 is made operative to drain the air in the crankcase 24 through the negative pressure passageway 32. Due to this a pressure in the crankcase 24 becomes a desired negative pressure.
  • Fig. 4 illustrates a second embodiment of the present invention.
  • the parts and components having the same functions as those of the parts and components shown in the first embodiment are designated by the same reference numerals.
  • a feature of the second embodiment is that the crankshaft 26 and the vacuum pump 34 as the negative pressure generating means are interlocked by momentum transfer means 40.
  • the crankshaft 26 and the vacuum pump 34 as the negative pressure generating means are interlocked by momentum transfer means 40.
  • the crankshaft 26 and the vacuum pump 34 as the negative pressure generating means are interlocked by momentum transfer means 40.
  • the vacuum pump 34 can be operated upon operating the engine, a pressure in the crankcase 24 can be always maintained into an optimum nagetive pressure and it is also possible to cope with a downstream of a blowby gas, thereby enabling the vertical motion of the piston and the rotational motion of the crankshaft to be smoothly performed.
  • the present invention can be also employed to other various kinds of engines (e.g., a diesel engine, etc.) in the internal combustion engine.
  • a rotary engine of the internal combustion engine by setting a pressure in a space which is constituted by an internal gear of a rotor and a stationary gear into a negative pressure, an air resistance in the engagement of each gear upon rotation of the rotor is decreased and the rotor and an eccentric shaft are rotated smoothly, thereby enabling an output efficiency of the engine to be improved.
  • the blowby gas which flows from the combustion chamber into the crankcase is always drained from the crankcase by the vacuum pump which is interlocked with the crankshaft and a pressure in the crankcase is set into a negative pressure; however, it is also possible to maintain the pressure in the crankcase to be negative by other methods such as a method of utilizing the reciprocating motion of the piston and the negative pressure of a suction tube, or the like.
  • the engine and the vacuum pump as the negative pressure generating means were communicated by the negative pressure passageway and are integrally constituted, but it may be possible to constitute in such a manner that the engine and the negative pressure passageway or the vacuum pump are detachably provided and the pressure in the crankcase is set into a negative pressure using the vacuum pump if necessary. With such a constitution, it is possible to reduce the number of steps of attaching the vacuum pump and the negative pressure passageway without causing any inconvenience of an increase in weight of a vehicle.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP84400447A 1983-03-08 1984-03-06 Moteur à combustion interne avec un carter à dépression Withdrawn EP0119135A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3221783 1983-03-08
JP32217/83U 1983-03-08

Publications (1)

Publication Number Publication Date
EP0119135A1 true EP0119135A1 (fr) 1984-09-19

Family

ID=12352755

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400447A Withdrawn EP0119135A1 (fr) 1983-03-08 1984-03-06 Moteur à combustion interne avec un carter à dépression

Country Status (1)

Country Link
EP (1) EP0119135A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4427414A1 (de) * 1994-08-03 1996-02-15 Helmut Kuhn Motorenölkreislauf für verschiedene Motoren
US6978756B2 (en) 2002-09-16 2005-12-27 Brp-Rotax Gmbh & Co. Kg Lubrication system for a power plant
AU2007200530B2 (en) * 2006-02-22 2009-04-09 Blackberry Limited Apparatus, and associated method, for facilitating delivery and processing of push content
US20130000593A1 (en) * 2010-11-02 2013-01-03 Ford Global Technologies, Llc Efficient vacuum for a vehicle
US9103246B2 (en) 2010-11-02 2015-08-11 Ford Global Technologies, Llc System and method for reducing vacuum degradation in a vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2271150A (en) * 1940-01-20 1942-01-27 Dieselair Corp Forced draft breather system for engines
GB2006329A (en) * 1977-10-24 1979-05-02 Semt Removing Oil Vapours from Internal Combustion Engine Crankcases
US4257383A (en) * 1979-08-09 1981-03-24 Boswell William C Crankcase vacuum system
FR2501783A1 (fr) * 1981-03-13 1982-09-17 Lefeuvre Jean Claude Moteurs thermiques rotatifs et compresseurs

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2271150A (en) * 1940-01-20 1942-01-27 Dieselair Corp Forced draft breather system for engines
GB2006329A (en) * 1977-10-24 1979-05-02 Semt Removing Oil Vapours from Internal Combustion Engine Crankcases
US4257383A (en) * 1979-08-09 1981-03-24 Boswell William C Crankcase vacuum system
FR2501783A1 (fr) * 1981-03-13 1982-09-17 Lefeuvre Jean Claude Moteurs thermiques rotatifs et compresseurs

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4427414A1 (de) * 1994-08-03 1996-02-15 Helmut Kuhn Motorenölkreislauf für verschiedene Motoren
US6978756B2 (en) 2002-09-16 2005-12-27 Brp-Rotax Gmbh & Co. Kg Lubrication system for a power plant
US7261078B2 (en) 2002-09-16 2007-08-28 Brp-Rotax Gmbh & Co. Kg Lubrication system for a power plant
AU2007200530B2 (en) * 2006-02-22 2009-04-09 Blackberry Limited Apparatus, and associated method, for facilitating delivery and processing of push content
US20130000593A1 (en) * 2010-11-02 2013-01-03 Ford Global Technologies, Llc Efficient vacuum for a vehicle
US8640680B2 (en) * 2010-11-02 2014-02-04 Ford Global Technologies, Llc Efficient vacuum for a vehicle
US9103246B2 (en) 2010-11-02 2015-08-11 Ford Global Technologies, Llc System and method for reducing vacuum degradation in a vehicle

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19850520

RIN1 Information on inventor provided before grant (corrected)

Inventor name: IMAIZUMI, MICHIO