EP0063385A2 - Four-cycle internal combustion engine - Google Patents
Four-cycle internal combustion engine Download PDFInfo
- Publication number
- EP0063385A2 EP0063385A2 EP82103323A EP82103323A EP0063385A2 EP 0063385 A2 EP0063385 A2 EP 0063385A2 EP 82103323 A EP82103323 A EP 82103323A EP 82103323 A EP82103323 A EP 82103323A EP 0063385 A2 EP0063385 A2 EP 0063385A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- valves
- intake
- valve
- exhaust
- intake valves
- 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
- F01L1/053—Camshafts overhead type
- F01L1/0532—Camshafts overhead type the cams being directly in contact with the driven valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/26—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
- F01L1/265—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder peculiar to machines or engines with three or more intake valves per cylinder
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4214—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder
- F02F1/4221—Shape or arrangement of intake or exhaust channels in cylinder heads specially adapted for four or more valves per cylinder particularly for three or more inlet valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L2003/25—Valve configurations in relation to engine
- F01L2003/251—Large number of valves, e.g. five or more
-
- 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
- F02B1/00—Engines characterised by fuel-air mixture compression
- F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
- F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
-
- 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
- F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
-
- 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
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/18—DOHC [Double overhead camshaft]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F2001/244—Arrangement of valve stems in cylinder heads
- F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis
Definitions
- the present invention relates to a four-cycle internal combustion engine.
- a four-cycle internal combustion engine In order to improve the output performance of a four-cycle internal combustion engine atits high speed running range, it is a current practice to increase the number of intake valves and the number of exhaust valves for each cylinder of the internal combustion engine.
- valve area the sum of the areas to be occupied in a combustion chamber by the intake and exhaust valves, i.e., the so-called "valve area" is increased to improve the charge and discharge efficiencies in accordance with increases in the intake and exhaust valves and partly because the respective valves themselves can have their sizes and weights reduced so that their followabilities at a high speed can be improved.
- a valve or valves may occasionally fail to be aligned with the corresponding cam shaft if the valve number is too large.
- connecting means for connecting the nis- aligned valve or valves and its or their cam shaft is newly required for driving it or them, thus raising another problem that the construction of the valve driving system is complicated.
- the invention as claimed has been conceived in order to remedy these drawbacks and solves the problem to provide a four-cycle engine which is enabled to have at least three intake valves of the intake and exhaust valve without detrimental interferences in a combustion chamber and to drive the three pairs of valves without rendering their driving system too complicated.
- Figure 1 is a longitudinal section showing the engine according to the present invention
- Figure 2 is a section taken along line II - II of Figure 1
- Figure 3 is a section taken along line III - III of Figure 1
- Firure 4 is a section taken along line IV - IV of Figure 2.
- FIG. 1 illustrates one cylinder of a four-cycle engine, in which reference letters a and b indicate a cylinder and a cylinder head, respectively, and reference numerals 1 and 2 indicate an intake passage and an exhaust passage, respectively.
- Numeral 3 indicates a combustion chamber which is formed below the afore-mentioned cylinder head b and into which the intake and exhaust passages 1 and 2 are opened.
- Numeral 4 indicates a threaded hole for mounting an ignition plug, which is opened at the center portion of the upper side of the afore-mentioned combustion chamber 3.
- Nuneral 5 indicates intake valves for opening and closing the afore-mentioned intake passage 1
- Said intake and exhaust valves 5 and 6 have their respective lower ends facing the combustion chamber 3 to close the open ends of the intake passage 1 and the exhaust passage 2, respectively. Their respective intermediate portions are slidably supported in the wall of the cylinder head b through guides 5a and 6a.
- Numerals 7 and 8 indicate lifters which are formed to extend from the upper ends of both the afore-mentioned valves 5 and 6 and through which both the valves 5 and 6 are connected to corresponding cam shafts 9 and 10 just thereabove so that they are driven by said shafts 9 and 10.
- Numerals 11 and 12 indicate springe which. are made operative to bias the intake and exhaust valves 5 and 6 in their closing directions.
- cam shafts 9 and 10 are rotatably supported above the cylinder head b through a cam carrier 13 and cam caps 14 and 15.
- Numeral 16 indicates a cover which covers the afore-mentioned cam shafts 9 and 10 and the cam caps 14 and 15 and which is formed to extend from the upper end of the cam carrier 13.
- the four-cycle engine thus constructed is equipped, so as to improve its output performance, with a plurality of intake values 5 and a plurality of exhaust valves 6 for each cylinder, of which at least the intake valves 5 are three in number.
- the afore-mentioned three intake valves 5 are arranged and constructed such that the intermediate one 5' faces the combustion chamber 3 at a smaller angle of inclination with respect to the axis l 1 of the cylinder a than that of the remaining two outer intake valves 5,5.
- the afore-mentioned intake valves 5 are further arranged and constructed such that all their respective axes l2 extend through the center O1 of the cam shaft 9.
- the afore-mentioned intake valves 5 are arranged, as shown in Figure 2, such that the intermediate one 5' is more offset to the outside with respect to the center line l3, which divides the conbustion chamber 3 into intake and exhaust portions, than the two intake valves 5,5 at both sides, whereby the entirety of intake valves 5 does not interfere with one another.
- the exhaust valves 6 provided are two in number and are arranged in the combustion chamber 3 on a plane l4 which is parallel to the afore-mentioned center line l3.
- the exhaust valves 6 are arranged to have their respective axes l 5 extending through the center 0 2 of the cam shaft 10 and are set with an equal angle of inclination l3 with respect to the axis l1 of the cylinder a.
- the intake valves 5 provided in the embodiment thus far described are three in number, three exhaust valves 6 may be provided if they adopt the arrangement and construction similar to those of the intake valves 5.
- the intermediate intake valve 5' is arranged to face the combustion chamber at a smaller angle ⁇ 1 of inclination with respect to the axis l1 of the cylinder than that of the remaining two intake valves 5 when the three intake valves are to be provided.
- the intermediate intake valve 5' is more offset to the outside than the intake valves at both sides so that said three intake valves can be arranged in the combustion chamber without any interference among them.
- said three intake valves are so arranged that their respective axes extend through the center O 1 of their can shaft 9.
- the positional relationship between the respective valves and their cam shaft is not changed from that of the prior art, and no new one is required as the means for connecting the respective valves with their cam shaft so that the valve driving system is not necessarily made complicated.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
- The present invention relates to a four-cycle internal combustion engine. In order to improve the output performance of a four-cycle internal combustion engine atits high speed running range, it is a current practice to increase the number of intake valves and the number of exhaust valves for each cylinder of the internal combustion engine.
- This is partly because the sum of the areas to be occupied in a combustion chamber by the intake and exhaust valves, i.e., the so-called "valve area" is increased to improve the charge and discharge efficiencies in accordance with increases in the intake and exhaust valves and partly because the respective valves themselves can have their sizes and weights reduced so that their followabilities at a high speed can be improved.
- However, there exist restrictions in that the area of the combustion chamber to be faced by the respective valves is limited and that the plural valves have to be arranged within that limited area without any interference among the plural valves.
- In case the number of the valves is increased, there arises another problem in providing a suitable system -for driving said valves.
- Specifically, in the structure having its valves driven by the cam shafts which are located just above then, a valve or valves may occasionally fail to be aligned with the corresponding cam shaft if the valve number is too large.
- In this case, connecting means for connecting the nis- aligned valve or valves and its or their cam shaft is newly required for driving it or them, thus raising another problem that the construction of the valve driving system is complicated.
- From the reasons thus far discussed, according to the prior art, the respective numbers of the intake and exhaust valves are two and are not increased further.
- The invention as claimed has been conceived in order to remedy these drawbacks and solves the problem to provide a four-cycle engine which is enabled to have at least three intake valves of the intake and exhaust valve without detrimental interferences in a combustion chamber and to drive the three pairs of valves without rendering their driving system too complicated.
- One way of carrying out the invention is described in detail below with reference to drawings which illustrate merely one specific embodiment, in which:-
- Figure 1 is a longitudinal section showing the engine according to the present invention; Figure 2 is a section taken along line II - II of Figure 1; Figure 3 is a section taken along line III - III of Figure 1: and Firure 4 is a section taken along line IV - IV of Figure 2.
- These drawings illustrate one cylinder of a four-cycle engine, in which reference letters a and b indicate a cylinder and a cylinder head, respectively, and
reference numerals 1 and 2 indicate an intake passage and an exhaust passage, respectively. -
Numeral 3 indicates a combustion chamber which is formed below the afore-mentioned cylinder head b and into which the intake andexhaust passages 1 and 2 are opened. - Numeral 4 indicates a threaded hole for mounting an ignition plug, which is opened at the center portion of the upper side of the afore-mentioned
combustion chamber 3. - Nuneral 5 indicates intake valves for opening and closing the afore-mentioned intake passage 1, and numeral 6 Lndicates exhaust valves for opening and closing the
exhaust passage 2. - Said intake and
exhaust valves 5 and 6 have their respective lower ends facing thecombustion chamber 3 to close the open ends of the intake passage 1 and theexhaust passage 2, respectively. Their respective intermediate portions are slidably supported in the wall of the cylinder head b throughguides 5a and 6a. -
Numerals valves 5 and 6 and through which both thevalves 5 and 6 are connected tocorresponding cam shafts said shafts -
Numerals exhaust valves 5 and 6 in their closing directions. - Furthermore, the afore-mentioned
cam shafts cam carrier 13 andcam caps -
Numeral 16 indicates a cover which covers the afore-mentionedcam shafts cam caps cam carrier 13. - The four-cycle engine thus constructed is equipped, so as to improve its output performance, with a plurality of
intake values 5 and a plurality of exhaust valves 6 for each cylinder, of which at least theintake valves 5 are three in number. - Incidentally, it is suite natural that the numbers of the intake passage 1 and the
exhaust passage 2 be increased in accordance with the respective numbers of thevalves 5 and 6. - The afore-mentioned three
intake valves 5 are arranged and constructed such that the intermediate one 5' faces thecombustion chamber 3 at a smaller angle of inclination with respect to the axis ℓ1 of the cylinder a than that of the remaining twoouter intake valves - Specifically, if the angle of inclination of the intermediate intake valve 5' is designated at α1 whereas the angle of inclination of the two
outer intake valves 5 is indicated at α2, then a relation of α1<α2 exists. - On the other hand, the afore-mentioned
intake valves 5 are further arranged and constructed such that all their respective axes ℓ2 extend through the center O1 of thecam shaft 9. - Thus, the afore-mentioned
intake valves 5 are arranged, as shown in Figure 2, such that the intermediate one 5' is more offset to the outside with respect to the center line ℓ3, which divides theconbustion chamber 3 into intake and exhaust portions, than the twointake valves intake valves 5 does not interfere with one another. - Moreover, since the
respective intake valves 5 have their axes ℓ2 extending through the center O1 of thecam shaft 9, nothing is newly required except thelifters 7 acting as means for connecting theintake valves 5 withsaid shaft 9. - On the contrary, the exhaust valves 6 provided are two in number and are arranged in the
combustion chamber 3 on a plane ℓ4 which is parallel to the afore-mentioned center line ℓ3. - Moreover, the exhaust valves 6 are arranged to have their respective axes ℓ5 extending through the center 02 of the
cam shaft 10 and are set with an equal angle of inclination ℓ3 with respect to the axis ℓ1 of the cylinder a. - Thus, since the afore-mentioned exhaust valves provided are two in number, they are prevented from interfering with each other, even if they are in the
combustion chamber 3 on the straight line, and nothing is newly required except thelifters 8 acting as means for connecting the exhaust valves 6 with thecam shaft 10. - Incidentally, although the
intake valves 5 provided in the embodiment thus far described are three in number, three exhaust valves 6 may be provided if they adopt the arrangement and construction similar to those of theintake valves 5. - As has been described hereinbefore, according to the present invention, the intermediate intake valve 5' is arranged to face the combustion chamber at a smaller angle α1 of inclination with respect to the axis ℓ1 of the cylinder than that of the remaining two
intake valves 5 when the three intake valves are to be provided. As a result, the intermediate intake valve 5' is more offset to the outside than the intake valves at both sides so that said three intake valves can be arranged in the combustion chamber without any interference among them. - Moreover, said three intake valves are so arranged that their respective axes extend through the center O1 of their
can shaft 9. The positional relationship between the respective valves and their cam shaft is not changed from that of the prior art, and no new one is required as the means for connecting the respective valves with their cam shaft so that the valve driving system is not necessarily made complicated.
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61843/81 | 1981-04-22 | ||
JP6184381A JPS57176311A (en) | 1981-04-22 | 1981-04-22 | Four-cycle engine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0063385A2 true EP0063385A2 (en) | 1982-10-27 |
EP0063385A3 EP0063385A3 (en) | 1983-04-13 |
EP0063385B1 EP0063385B1 (en) | 1985-07-31 |
Family
ID=13182766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19820103323 Expired EP0063385B1 (en) | 1981-04-22 | 1982-04-20 | Four-cycle internal combustion engine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0063385B1 (en) |
JP (1) | JPS57176311A (en) |
DE (2) | DE63385T1 (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0144179A2 (en) * | 1983-11-25 | 1985-06-12 | Honda Giken Kogyo Kabushiki Kaisha | Multiple-valved internal combustion engine |
GB2166799A (en) * | 1984-11-13 | 1986-05-14 | Bothwell P W | I.c. engine overhead valve gear |
EP0245550A1 (en) * | 1986-05-14 | 1987-11-19 | BOTHWELL, Peter William | Cylinder head for an internal combustion engine |
EP0262250A1 (en) * | 1986-10-02 | 1988-04-06 | Audi Ag | Four-stroke internal-combustion engine |
EP0265282A1 (en) * | 1986-10-23 | 1988-04-27 | Honda Giken Kogyo Kabushiki Kaisha | Valve operating apparatus in an internal combustion engine |
DE3708675A1 (en) * | 1987-03-17 | 1988-09-29 | Bayerische Motoren Werke Ag | Valve actuating arrangement for internal combustion engines with a plurality of valves of the same type for each cylinder |
EP0324092A1 (en) * | 1988-01-11 | 1989-07-19 | Yamaha Hatsudoki Kabushiki Kaisha | Valve actuation device for multi-valve-type engine |
US4858573A (en) * | 1984-11-13 | 1989-08-22 | Bothwell Peter W | Internal combustion engines |
WO1990003498A1 (en) * | 1988-09-17 | 1990-04-05 | Audi Ag | Valve-controlled reciprocating piston internal combustion engine |
EP0408079A1 (en) * | 1989-07-14 | 1991-01-16 | Yamaha Hatsudoki Kabushiki Kaisha | Valve actuating arrangement for engine |
FR2652384A1 (en) * | 1989-09-28 | 1991-03-29 | Daimler Benz Ag | INTERNAL COMBUSTION ENGINE WITH VALVE DISTRIBUTION. |
EP0483109A2 (en) * | 1989-02-14 | 1992-04-29 | Yamaha Hatsudoki Kabushiki Kaisha | Camshaft arrangement for multiple valve engine |
US5515827A (en) * | 1993-09-22 | 1996-05-14 | Dr. Ing. H.C.F. Porsche Ag | Multicylinder, four-stroke internal-combustion engine having three intake valves and one exhaust valve per cylinder |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0646004B2 (en) * | 1984-04-11 | 1994-06-15 | ヤマハ発動機株式会社 | Camshaft holding structure for internal combustion engine |
JPS60216014A (en) * | 1984-04-11 | 1985-10-29 | Yamaha Motor Co Ltd | Valve drive mechanism in internal-combustion engine |
JPS60216012A (en) * | 1984-04-11 | 1985-10-29 | Yamaha Motor Co Ltd | Valve drive mechanism in internal-combustion engine |
JPS615305U (en) * | 1984-06-18 | 1986-01-13 | 日産自動車株式会社 | engine cylinder head |
JPS6149113A (en) * | 1984-08-15 | 1986-03-11 | Yamaha Motor Co Ltd | Valve moving device of interval-combustion engine |
JPS6149121A (en) * | 1984-08-16 | 1986-03-11 | Yamaha Motor Co Ltd | 4 stroke internal-combustion engine |
JPH0811929B2 (en) * | 1985-07-10 | 1996-02-07 | アウデイ アクチエンゲゼルシヤフト | 4-cycle internal combustion engine |
JPS62286771A (en) | 1986-06-05 | 1987-12-12 | Canon Inc | Platen roller |
JP2501649Y2 (en) * | 1987-12-21 | 1996-06-19 | トヨタ自動車株式会社 | Valve train of internal combustion engine |
JPH0759922B2 (en) * | 1989-11-17 | 1995-06-28 | ヤマハ発動機株式会社 | Intake device for 4-cycle internal combustion engine |
JPH02161168A (en) * | 1989-11-17 | 1990-06-21 | Yamaha Motor Co Ltd | Intake device for four-cycle internal combustion engine |
JP2576905B2 (en) * | 1989-11-17 | 1997-01-29 | ヤマハ発動機株式会社 | Intake device for 4-cycle internal combustion engine |
JP2599324B2 (en) * | 1991-10-24 | 1997-04-09 | ヤマハ発動機株式会社 | Valve train for 4-stroke engine |
JPH05209581A (en) * | 1992-07-20 | 1993-08-20 | Yamaha Motor Co Ltd | Air intake device for four-cycle internal combustion engine |
JP2556419B2 (en) * | 1992-07-20 | 1996-11-20 | ヤマハ発動機株式会社 | Intake device for 4-cycle internal combustion engine |
JPH05215050A (en) * | 1992-07-20 | 1993-08-24 | Yamaha Motor Co Ltd | Intake device for four-cycle internal combustion engine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1484376A (en) * | 1921-02-21 | 1924-02-19 | Lanzerotti-Spina Ettore | Internal-combustion engine |
GB242919A (en) * | 1925-07-10 | 1925-11-19 | Napier & Son Ltd | Improvements in or relating to valve operating mechanism for internal combustion engines |
GB687528A (en) * | 1950-09-09 | 1953-02-18 | Karl Maybach | Improvements in the liquid cooling of cylinder heads for internal combustion engines |
US3211137A (en) * | 1963-03-12 | 1965-10-12 | Love John | Input valve systems for internal combustion engines |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB296125A (en) * | 1927-05-26 | 1928-08-27 | Ettore Lanzerotti Spina | Improvements in and relating to the valves and valve gear of internal combustion engines |
-
1981
- 1981-04-22 JP JP6184381A patent/JPS57176311A/en active Granted
-
1982
- 1982-04-20 DE DE1982103323 patent/DE63385T1/en active Pending
- 1982-04-20 DE DE8282103323T patent/DE3265030D1/en not_active Expired
- 1982-04-20 EP EP19820103323 patent/EP0063385B1/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1484376A (en) * | 1921-02-21 | 1924-02-19 | Lanzerotti-Spina Ettore | Internal-combustion engine |
GB242919A (en) * | 1925-07-10 | 1925-11-19 | Napier & Son Ltd | Improvements in or relating to valve operating mechanism for internal combustion engines |
GB687528A (en) * | 1950-09-09 | 1953-02-18 | Karl Maybach | Improvements in the liquid cooling of cylinder heads for internal combustion engines |
US3211137A (en) * | 1963-03-12 | 1965-10-12 | Love John | Input valve systems for internal combustion engines |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0144179B1 (en) * | 1983-11-25 | 1988-02-10 | Honda Giken Kogyo Kabushiki Kaisha | Multiple-valved internal combustion engine |
EP0144179A2 (en) * | 1983-11-25 | 1985-06-12 | Honda Giken Kogyo Kabushiki Kaisha | Multiple-valved internal combustion engine |
US4858573A (en) * | 1984-11-13 | 1989-08-22 | Bothwell Peter W | Internal combustion engines |
GB2166799A (en) * | 1984-11-13 | 1986-05-14 | Bothwell P W | I.c. engine overhead valve gear |
GB2166799B (en) * | 1984-11-13 | 1989-06-07 | Bothwell P W | Improvements relating to internal combustion engines |
EP0245550A1 (en) * | 1986-05-14 | 1987-11-19 | BOTHWELL, Peter William | Cylinder head for an internal combustion engine |
EP0262250A1 (en) * | 1986-10-02 | 1988-04-06 | Audi Ag | Four-stroke internal-combustion engine |
EP0265282A1 (en) * | 1986-10-23 | 1988-04-27 | Honda Giken Kogyo Kabushiki Kaisha | Valve operating apparatus in an internal combustion engine |
DE3708675A1 (en) * | 1987-03-17 | 1988-09-29 | Bayerische Motoren Werke Ag | Valve actuating arrangement for internal combustion engines with a plurality of valves of the same type for each cylinder |
EP0324092A1 (en) * | 1988-01-11 | 1989-07-19 | Yamaha Hatsudoki Kabushiki Kaisha | Valve actuation device for multi-valve-type engine |
US4915065A (en) * | 1988-01-11 | 1990-04-10 | Yamaha Hatsudoki Kabushiki Kaisha | Valve actuation device for multi-valve type engine |
WO1990003498A1 (en) * | 1988-09-17 | 1990-04-05 | Audi Ag | Valve-controlled reciprocating piston internal combustion engine |
EP0483109A2 (en) * | 1989-02-14 | 1992-04-29 | Yamaha Hatsudoki Kabushiki Kaisha | Camshaft arrangement for multiple valve engine |
EP0483109B1 (en) * | 1989-02-14 | 1996-05-15 | Yamaha Hatsudoki Kabushiki Kaisha | Camshaft arrangement for multiple valve engine |
EP0408079A1 (en) * | 1989-07-14 | 1991-01-16 | Yamaha Hatsudoki Kabushiki Kaisha | Valve actuating arrangement for engine |
FR2652384A1 (en) * | 1989-09-28 | 1991-03-29 | Daimler Benz Ag | INTERNAL COMBUSTION ENGINE WITH VALVE DISTRIBUTION. |
US5515827A (en) * | 1993-09-22 | 1996-05-14 | Dr. Ing. H.C.F. Porsche Ag | Multicylinder, four-stroke internal-combustion engine having three intake valves and one exhaust valve per cylinder |
Also Published As
Publication number | Publication date |
---|---|
JPH024765B2 (en) | 1990-01-30 |
JPS57176311A (en) | 1982-10-29 |
EP0063385A3 (en) | 1983-04-13 |
DE3265030D1 (en) | 1985-09-05 |
DE63385T1 (en) | 1983-04-14 |
EP0063385B1 (en) | 1985-07-31 |
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