US3904329A - Rotary piston combustion engine of trochoid type - Google Patents

Rotary piston combustion engine of trochoid type Download PDF

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Publication number
US3904329A
US3904329A US451770A US45177074A US3904329A US 3904329 A US3904329 A US 3904329A US 451770 A US451770 A US 451770A US 45177074 A US45177074 A US 45177074A US 3904329 A US3904329 A US 3904329A
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United States
Prior art keywords
air
combustion engine
passage
rotary piston
throttle
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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.)
Expired - Lifetime
Application number
US451770A
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English (en)
Inventor
Johannes Steinwart
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Audi AG
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Audi AG
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Publication date
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    • 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
    • F01M3/00—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture
    • 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
    • F02B53/00—Internal-combustion aspects of rotary-piston or oscillating-piston engines
    • 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
    • F02B53/00—Internal-combustion aspects of rotary-piston or oscillating-piston engines
    • F02B2053/005—Wankel engines
    • 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
    • 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
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • ABSTRACT A trochoid-type rotary piston combustion engine has a [30] Foreign Application Priority Data housing composed of at least one shell and at least two Mar- 22 1973 Germany N 2314251 parallel end parts as well as an inlet and an outlet pas sage equipped with a throttle. Each shell is arranged 52 11.5. CI 418/99; 418/100 between two end Parts nnected thereto by tension 51 Int. c1. F01C 21/04 bolts bOund interior Space in which [58] Field of Search l H 123/801, 196 R; 184/55 R; arranged a multi-arcuate piston.
  • the piston is pro- 4I8/83 84, 87 97 99 [0O vided with sealing members slidable along the inner faces of said housing.
  • Lubrication of the housing inner [56] References Cited face is in the form of a lubricating oil supply orifice UNITED STATES PATENTS opening into the intake chamber. 3.771903 11/1973 King et al. 418/84 7 Claims, 7 Drawing Figures PATENTED 91975 3,904,329
  • the object of the invention is to provide uniformly proportioned supply of lubricant to the inner faces of the housing and the sealing members sliding over them while preventing combustion of any major quantity of lubricant that may be unused. 4
  • the oil entering the air passage is permitted to wet the passage walls with a film of oil by adhesion by the passing air.
  • the film is evenly propelled all the way into the intake chamber separately from the fuel mixture.
  • the stream of air propelling the oil is more or less effective and more or less vigorously entraining of a corresponding quantity of oil depending on the setting of the throttle.
  • the passage communicating with the atmosphere may lead from the axial midpoint of the outer shell surface in a radial direction and open into enlarged tension bolt hole nearest the inlet passage.
  • a groove may be provided that extends from the bolt hole to apoint in the intake chamber.
  • the cross section of the groove in the end part may have a profile guiding the flow obliquely and radially outwardly towards the shell bearing surface.
  • the preponderance of the oil film traveling in the interior space may be guided onto the sliding surfacesof the sealing strips and so distributed by the incoming air and/or the fuel mixture that the sealing strips sliding along the shell bearing surface receive adequate lubrication throughou'ttheir width.
  • the air throttling means may consist of a rotary control valve for determining the volume of air flow.
  • the valve is mounted on the shaft of the throttle and is tightly enclosed by a housing having one air inlet and one air outlet, the outlet being connected by piping to the enlarged bolt hole.
  • the air inlet may expediently be in communication with the fresh air flowing from the air filter into the air intake of the carburetor.
  • Lubricant may for example be supplied by means of an intermediate-delivery oil proportioning pump with each shell receiving a separate proportion of comparable amount.
  • the passage communicating with the atmosphere gine is cold is reduced, and the orifices carrying lubrii cant are cleaned in this phase.
  • a combustion engine with suction pipe'injection having its own cold start assisting means it is possible to arrange for some of the fuel jet to reach the air inlet beginning in the air intake pipe and arrive in the working chamber by way of the air throttling means and the passage.
  • the lubrication of inner housing surfaces according l to the invention may be applied to rotary piston combustion engines with carburetor operation, but advantageously also to gasoline injection and gas operation.
  • FIG. I shows a partial view of a longitudinal section of a rotary piston combustion engine having two working chambers.
  • FIG. 2 is a partial view of a longitudinal section similar to FIG. 1 showing a second embodiment.
  • FIG. 3 shows a cross-section of part of the housing taken along line 1-1 in FIG. I.
  • FIG. 4 shows a section of a schematically represented air throttling means coupled with the throttle in accordance with one form of the invention.
  • FIG. 5 shows a view of the rotary control valve of the air throttling means of FIG. 4.
  • FIG. 6 shows a section of a schematically represented air throttling means coupled with the throttle in accordance with a second embodiment.
  • FIG. 7 shows a view of the rotary control valve of the air throttling means of FIG. 6.
  • FIG. 1 the housing of a rotary piston combustion engine having, for example. double working chambers consisting of one shell leach and end parts 2 as well as a substantiallyparallel interposed part 3.
  • the tension bolts 4 assemble theparts which bound an interior space S in which is rotatably arranged a multi-arcuate piston 6 provided with sealing members 7 sliding along the faces 8 of end parts 2 and between part 3 as well as the shell bearing surface 9.
  • the passage 10 communicating with the atmosphere opens into the enlarged bolt hole 12 nearest the inlet passage 11 which hole is in communication at the adjacent faces 8, with grooves 13 extending in end parts 2 and between part 3 from bolt hole l2 into the interior 5 near the inlet passage l l.
  • the bolt holes 12 in the two shells l are separated from each other by sealing means 18 to prevent them from affecting each other.
  • a stream of air generated by the negative pressure in the working chamber propels the lubricant emerging from orifice l4 along the walls of passage [0, bolt hole 12 and groove 13 into the working chamber inside the interior spaces to lubricate the sealing members 7.
  • a cold start assisting means so that in the starting phase a fuel-oil mixture passes directly into the working chamber and, at the same time. supplies the sealing members 7 with lubricant which is thusly flushed in.
  • FIG. 2 represents the second embodiment of a groove 13a arranged in end part 2 and between part 3. the conformation of which is such that the stream of air propelling an oil film is directed obliquely radially outward and thus principally reaches the shell bearing surface 9 so that the sealing members 7 arranged in piston 6 may thence be supplied with lubricant.
  • the arrangement represented in PK]. 3 exhibits the orifice located near an end inlet ll of a groove 13 or 130. Since the sealing members 7 arranged in piston 6 form their greatest angle of swing when sliding over groove 13 cr I30. the setting of sealing strip 70 may cause lubricant to be picked up from the mouth of groove 13 or 130 and delivered radially inward by way of sealing pin 7!; as far as the sealing flanges 7c.
  • the air throttling means shown in FIG. 4 consists of a rotary control valve 19 arranged on the shaft 20 of the throttle 20a of the illustrated carburetor and an in tegrated housing 2 ⁇ closed with a cover 22 and having an air inlet 25 connected to an air intake pipe 24 of the carburetor and an air outlet 26 connected to passage [0 in H0. l.
  • the rotary control valve 19 has one face in tight contact with a radial inner surface of housing 23 whence the air outlet 26 proceeds In idling. the air throughput is matched to the idling system of the car buretor. the rotary control valve 19 freeing only a small hole 27 shown in FlG. 5.
  • FIG. I In a combustion engine with suction pipe 'injeotion'. a cold start assisting means 29 may so arranged in the air intake pipe 24 of the carburetor so that ih cold starting, its fuel jet will reach awnings. 1
  • FIG. 6 shows an airithrottling means in a second embodiment having a housing 30 in which a rotary control valve-31 is arranged on a shaft 20 of a throttle. As the throttle opens, the val-ve exposes an aperture 32 enlarging in circumferential direction on its peripheral surface as shown in FIGJZ, opposite air outlet 26.
  • the air inlet 25 of air throttling means of H05. 4 and 6 is preferably connected by way of an air intake pipe 24 of the engine to an existing air filter (not shown).
  • a rotary piston combustion engine of trochoid type having a housing composed of at least one shell and at least two parallel end parts and comprising an inlet passage provided with a throttle and an outlet passage. each shell being arranged between two end parts and being connected thereto to bound an interior space, a multi-apex piston rotatably arranged in the space and provided with sealing members sliding along the inner surfaces of the housing, an air passage communicating with the atmosphere at one end and opening into the intake chamber near the inlet passage at the other end, an air throttling means arranged within said air passage and coupled with the throttle.
  • lubricant supply means including a lubricant supply passage opening into said air passage for providing lubrication of said inner surfaces.
  • a rotary piston combustion engine in which tension bolts assemble the shell and end parts and an enlarged hole receives each bolt.
  • the passage in communication with the atmosphere leads from the axial midpoint of the shell outer surface in a radial direction and opens into an enlarged tension bolt hole nearest the inlet passage.'arid the adjacent faces of the end parts each provided with a groove extending from the bolt hole to a point in the intake chamber.
  • a rotary piston combustion engine according to claim 2 in which the cross-section of the groove in the end part has a profile guiding the flow obliquely radially outward towards the shell inner surface.
  • a rotary piston combustion engine in which the groove opens into the intake chamber near the inlet port in the region where the tilting angle of the radial sealing strips is greatest.
  • a rotary piston combustion engine in which the air throttling means includes a throttle and a rotary control valve determining the volume of air flow. arranged on the shaft of the throttle. the valve being enclosed by a housing provided with one air inlet and one air outlet coupled with the en larged bolt hole.
  • a rotary piston combustion engine according to claim 1 in which a spring loaded check valve opens under oil pressure arranged in the piping of the lubricant orifice.
  • a rotary piston combustion engine according to claim 1 in which means are provided for connecting the air passage to a source of fuel during cold starting of the engine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
US451770A 1973-03-22 1974-03-18 Rotary piston combustion engine of trochoid type Expired - Lifetime US3904329A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732314251 DE2314251A1 (de) 1973-03-22 1973-03-22 Rotationskolben-brennkraftmaschine in trochoidenbauart

Publications (1)

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US3904329A true US3904329A (en) 1975-09-09

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ID=5875530

Family Applications (1)

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US451770A Expired - Lifetime US3904329A (en) 1973-03-22 1974-03-18 Rotary piston combustion engine of trochoid type

Country Status (6)

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US (1) US3904329A (enrdf_load_stackoverflow)
JP (1) JPS5821084B2 (enrdf_load_stackoverflow)
DE (1) DE2314251A1 (enrdf_load_stackoverflow)
FR (1) FR2222532B1 (enrdf_load_stackoverflow)
GB (1) GB1422087A (enrdf_load_stackoverflow)
IT (1) IT1004370B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994642A (en) * 1975-01-11 1976-11-30 Audi Nsu Auto Union Aktiengesellschaft Rotary piston internal combustion engine of the trochoidal type
US4388901A (en) * 1980-07-07 1983-06-21 Toyo Kogyo Co. Ltd. Lubricating oil supply system for a supercharged rotary piston engine
US4390330A (en) * 1979-08-27 1983-06-28 Toyo Kogyo Co. Ltd. Lubricating oil supply means for rotary piston engines
US10871161B2 (en) 2017-04-07 2020-12-22 Stackpole International Engineered Products, Ltd. Epitrochoidal vacuum pump
CN114483250A (zh) * 2022-02-07 2022-05-13 西安交通大学 一种反三角转子发动机强制润滑系统设计方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52154911A (en) * 1976-06-17 1977-12-23 Toyota Motor Corp Housing fastening structure of rotary engine
JPS5961377U (ja) * 1982-10-13 1984-04-21 宮内　孝晴 手洗付小便器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3771903A (en) * 1972-02-01 1973-11-13 R King Lubricating system for rotary machine
US3838950A (en) * 1970-06-18 1974-10-01 Cenco Inc Vacuum pump with lubricant metering groove

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3814555A (en) * 1972-07-14 1974-06-04 Gen Motors Corp Rotary engine gas seal lubrication system
GB1419322A (en) * 1972-08-16 1975-12-31 Dornier System Gmbh Rotary piston engine with means for lubricating radial sealing strips

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3838950A (en) * 1970-06-18 1974-10-01 Cenco Inc Vacuum pump with lubricant metering groove
US3771903A (en) * 1972-02-01 1973-11-13 R King Lubricating system for rotary machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994642A (en) * 1975-01-11 1976-11-30 Audi Nsu Auto Union Aktiengesellschaft Rotary piston internal combustion engine of the trochoidal type
US4390330A (en) * 1979-08-27 1983-06-28 Toyo Kogyo Co. Ltd. Lubricating oil supply means for rotary piston engines
US4388901A (en) * 1980-07-07 1983-06-21 Toyo Kogyo Co. Ltd. Lubricating oil supply system for a supercharged rotary piston engine
US10871161B2 (en) 2017-04-07 2020-12-22 Stackpole International Engineered Products, Ltd. Epitrochoidal vacuum pump
CN114483250A (zh) * 2022-02-07 2022-05-13 西安交通大学 一种反三角转子发动机强制润滑系统设计方法

Also Published As

Publication number Publication date
DE2314251A1 (de) 1974-09-26
JPS5821084B2 (ja) 1983-04-27
IT1004370B (it) 1976-07-10
GB1422087A (en) 1976-01-21
FR2222532B1 (enrdf_load_stackoverflow) 1977-10-07
JPS49121012A (enrdf_load_stackoverflow) 1974-11-19
FR2222532A1 (enrdf_load_stackoverflow) 1974-10-18

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