EP0144179B1
Expired / Lapsed
EP
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Multiple-valved internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1984-11-14
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Granted: 1988-02-10
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Expires: 2004-11-14
Abstract
No abstract record available.
Inventors
- 👤 Shinichi Miyakoshi
- 👤 Naoto Hara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 01:51
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/14; F01L1/143; F01L1/02; F01L1/024; F01L1/04; F01L1/047; F01L1/053; F01L1/26; F01L1/265; F02; F02F; F02F1/00; F02F1/24; F02F1/242; F02F1/42; F02F1/4214; F02F1/4221; F01L2001/0537; F01L3/00; F01L2003/25; F01L2003/256; F02B; F02B1/00; F02B1/02; F02B1/04; F02B2275/00; F02B2275/18; F02B2275/20; F02B61/00; F02B61/06; F02F2001/244; F02F2001/245; F02F2001/246; F02F7/00; F02F7/006
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
208 words
A multiple-valved internal combustion engine having three intake valves (4, 4, 4) and two exhaust valves (5, 5) for a common cylinder (1), the three intake valves (4, 4, 4) and the two exhaust valves (5, 5) being disposed in a cylinder head (2) on a common pitch circle centered on the center line of a combustion chamber (3) in the head (2) with the intake valves on one side of the circle and the exhaust valves on the other side; characterized in that the radial disposition of the valves (4, 4, 4 and 5, 5) is such that axial lines of these valves cross one another at a point on an axial line of the cylinder (1); in that an ignition plug (6) is positioned between the two exhaust valves (5, 5) and is inserted through the cylinder head (2) in an inclined posture such that its forward end is directed towards the center of the combustion chamber (3); and in that a single common cam shaft (7) driving all the intake and exhaust valves (4, 4, 4 and 5, 5) is provided horizontally at an intermediate position of the cylinder head (2) between the zone of the intake valves and the zone of the exhaust valves.
Claim 2
Dependent Claim
208 words
A multiple-valved internal combustion engine having three intake valves (4, 4, 4) and two exhaust valves (5, 5) for a common cylinder (1), the three intake valves (4, 4, 4) and the two exhaust valves (5, 5) being disposed in a cylinder head (2) on a common pitch circle centered on the center line of a combustion chamber (3) in the head (2) with the intake valves on one side of the circle and the exhaust valves on the other side; characterized in that the radial disposition of the valves (4, 4, 4 and 5, 5) is such that axial lines of these valves cross one another at a point on an axial line of the cylinder (1); in that an ignition plug (6) is positioned between the two exhaust valves (5, 5) and is inserted through the cylinder head (2) in an inclined posture such that its forward end is directed towards the center of the combustion chamber (3); and in that a single common cam shaft (7) driving all the intake and exhaust valves (4, 4, 4 and 5, 5) is provided horizontally at an intermediate position of the cylinder head (2) between the zone of the intake valves and the zone of the exhaust valves.
Claim 3
Dependent Claim
197 words
A multiple-valved internal combustion engine as claimed in claim 1, wherein the intake valve (4) that is the central one of the three intake valves (4, 4, 4) is so positioned that the axial line thereof is on a plane crossing at right angles an axial line of the common cam shaft (7), this central intake valve (4) being driven through a rocker arm (8A) supported on a rocker arm shaft (9A) provided in parallel with the cam shaft (7); wherein two further rocker arm shafts (9B, 9B) disposed one on each side of the first-mentioned rocker arm shaft (9A) each cross at right angles a triangular plane on each side defined by the axial line of each of the two intake valves (4, 4) positioned on either side of the central intake valve (4) and the axial line of each of the two exhaust valves (5, 5) with the apex thereof at the intersection point of these two axial lines; and wherein the rocker arms (8B, 8B and 8C, 8C) for driving these two intake valves (4, 4) and the two exhaust valves (5, 5) are supported on said two further rocker arms shafts (9B, 98).
Claim 4
Dependent Claim
109 words
A multiple-valved internal combustion engine as claimed in claim 1 or 2, wherein a first intake passage (11) connected to one intake valve (4) and a second intake passage (12) diverged into two and connected to the remaining two intake valves (4, 4), being the central one and one other of the three intake valves, are provided, side by side, in the cylinder head (2), an intake operation being carried out through both these intake passages (11, 12) in a high speed running range of the engine whereas intake operation through the second intake passage (12) is stopped at a middle and low speed running range of the engine.
Claim 5
Dependent Claim
66 words
A multiple-valved internal combustion engine as claimed in claim 1, 2 or 3, wherein the engine has a monoblock body comprising the cylinder head (2), the cylinder (1) and a crankcase (13); and wherein the crankcase (13) is provided at its lower surface with an opening (14) through which pass the axial lines of the intake valves (4, 4, 4) and the exhaust valves (5, 5).
References Cited (Backward Citations)
EP0063385A2
Cited
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