EP0146254A1
Expired / Lapsed
EP
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Cylinder head
Assignee: Rover Co Ltd
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Filing: 1984-11-07
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Granted: —
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Expires: 2004-11-07
Abstract
Abstract ⑨ A cylinder head has cooling passages 12 for cooling the inlet and exhaust valves 4, 5 formed by the bottom of a deep recess 10 cast into the head and a cup 11 seated for example on a ledge 11 a in the recess and secured thereto around its periphery. The cooling passage 12 is communicated with by means of drillings 13a to 13c, 14a to 14c and 17. The cup 11 has an aperture for a sparking plug 18 which may have a protective tube 19. An advantage of the construction is that wide cooling passages can be achieved but without recourse to sand cores with their inherent disadvantages.
Inventors
- 👤 Graham Ernest Atkin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 23:36
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/242; F01; F01L; F01L1/00; F01L1/02; F01L1/04; F01L1/047; F01L1/053; F01L1/0532; F02F1/26; F02F1/36; F02F1/38; F02F1/42; F02F1/4214; F02B; F02B1/00; F02B1/02; F02B1/04; F02B2275/00; F02B2275/18; F02F2001/241; F02F2001/244; F02F2001/245
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
106 words
1 A cylinder head in which the inlet and exhaust valves for each cylinder are inclined relative to and on opposite sides of the plane of the cylinder axes, the head comprising a casting having a recess for each cylinder extending, from the face that is opposed to the combustion chamber face, between the inlet and exhaust valves to the region of the associated exhaust port or ports, and a closing member which is inserted into each recess and connected at its periphery to the surface of that recess to define a cooling passage, the closing member having an aperture for insertion of a sparking plug.
Claim 2
Dependent Claim
106 words
1 A cylinder head in which the inlet and exhaust valves for each cylinder are inclined relative to and on opposite sides of the plane of the cylinder axes, the head comprising a casting having a recess for each cylinder extending, from the face that is opposed to the combustion chamber face, between the inlet and exhaust valves to the region of the associated exhaust port or ports, and a closing member which is inserted into each recess and connected at its periphery to the surface of that recess to define a cooling passage, the closing member having an aperture for insertion of a sparking plug.
Claim 3
Dependent Claim
17 words
2 A cylinder head as claimed in claim 1, wherein the closing member is dished in shape.
Claim 4
Dependent Claim
19 words
3 A cylinder head as claimed in claim 1 or claim 2, wherein the closing member is a pressing.
Claim 5
Dependent Claim
29 words
4 A cylinder head as claimed in any one of claims 1 to 3, wherein the angle between the inlet and exhaust valves lies between 40 0 and 60°.
Claim 6
Dependent Claim
35 words
5 A cylinder head as claimed in any one of claims 1 to 4, wherein there are four valves per cylinder and the sparking plug is positioned between the pairs of inlet and exhaust valves.
Claim 7
Dependent Claim
40 words
6 A cylinder head as claimed in any one of claims 1 to 5, wherein a boss is provided for each cylinder in which the sparking plug is positioned, and the closing member connects to the periphery of the boss.
Claim 8
Dependent Claim
25 words
7 A cylinder head as claimed in any one of claims 1 to 6, wherein the inlet and exhaust ports are defined by mould pieces.
Claim 9
Dependent Claim
35 words
8 A cylinder head as claimed in claim 7, wherein there are two mould pieces for each port shapes so that they can be withdrawn from the casting one from each end of the port.
Claim 10
Dependent Claim
32 words
9 A cylinder head as claimed in claim 7 or claim 8, wherein a port is so shaped that a mould piece can be withdrawn from the casting on a curved path.
Claim 11
Dependent Claim
24 words
10 A cylinder head as claimed in any one of claims 1 to 9, wherein at least one drilling communicates with each cooling passage.
Claim 12
Dependent Claim
14 words
11 A cylinder head substantially as hereinbefore described with reference to the accompanying drawings.
Claim 13
Dependent Claim
14 words
11 A cylinder head substantially as hereinbefore described with reference to the accompanying drawings.
Claim 14
Dependent Claim
19 words
12 An internal combustion engine having a cylinder head as claimed in any one of claims 1 to 11.
References Cited (Backward Citations)
DE395316C
Cited
GB579664A
Cited
CH277073A
Cited
US2990819A
Cited
US3144013A
Cited
US3468295A
Cited
FR2226231A1
Cited
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