EP0079042A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Internal combustion engine with engine knock sensor
Assignee: Nissan Motor Co Ltd
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Filing: 1982-11-03
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Granted: —
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Expires: 2002-11-03
Abstract
Abstract An internal combustion engine (10) comprises a cylinder head (12) having a cylinder wall section (14) defining therein a cylinder bore (14a), and an outer wall section (16), forming therebetween an engine coolant passage (18). The cylinder wall section (14) is formed with a boss section to which an engine knock sensor (24) is rigidly connected. The cylinder block outer wall section (16) is formed with an opening (22) at a location generally corresponding to the boss section (20) to separate the boss section (20) from the cylinder block outer wall section (16). Additionally, a resilient seal member (30) is disposed between the cylinder block outer wall section (16) and the engine knock sensor (24) to prevent engine coolant from leaking through the outer wall section opening (22). Accordingly, the engine knock sensor (24) is directly subjected to engine knock vibration, thereby greatly improving engine knock sensing accuracy without being affected by noise vibrations.
Inventors
- 👤 Yoshimasa Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 06:06
CPC Classifications
G; G01; G01L; G01L23/00; G01L23/22; G01L23/221; F; F02; F02F; F02F1/00; F02F1/18
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
179 words
An internal combustion engine (10) comprising: a cylinder block (12) having a cylinder wall section (14) defining thereinside a cylinder bore (14a), and an outer wall section (16) located outside of said cylinder wall section (14), an engine coolant passage (18) being formed between said cylinder wall and outer wall sections (14,16); a boss section (20) formed at and projecting from said cylinder wall section (14), said boss section (20) being formed with a threaded portion; means defining an opening (22) at said cylinder block outer wall section (16), said opening (22) being located at a position generally corresponding to said boss section (20) to prevent said boss section (20) from contacting with said cylinder block outer wall section (16); an engine knock sensor (24) having a threaded portion which engages with the threaded portion of said boss section; and a resilient seal member (30) disposed between said engine knock sensor (24) and said cylinder block outer wall section (16) to prevent engine coolant from leaking through said cylinder block outer wall section opening (22). (Figs. 2 and 3)
Claim 2
Dependent Claim
179 words
An internal combustion engine (10) comprising: a cylinder block (12) having a cylinder wall section (14) defining thereinside a cylinder bore (14a), and an outer wall section (16) located outside of said cylinder wall section (14), an engine coolant passage (18) being formed between said cylinder wall and outer wall sections (14,16); a boss section (20) formed at and projecting from said cylinder wall section (14), said boss section (20) being formed with a threaded portion; means defining an opening (22) at said cylinder block outer wall section (16), said opening (22) being located at a position generally corresponding to said boss section (20) to prevent said boss section (20) from contacting with said cylinder block outer wall section (16); an engine knock sensor (24) having a threaded portion which engages with the threaded portion of said boss section; and a resilient seal member (30) disposed between said engine knock sensor (24) and said cylinder block outer wall section (16) to prevent engine coolant from leaking through said cylinder block outer wall section opening (22). (Figs. 2 and 3)
Claim 3
Dependent Claim
51 words
An internal combustion engine as claimed in Claim 1, wherein said engine knock sensor (24) has a projected section (26) formed with said threaded portion, said projected section (26) being disposed in a hole (20a) of said boss section which hole is formed with said threaded portion. (Figs. 2 and 3)
Claim 4
Dependent Claim
41 words
An internal combustion engine as claimed in Claim 2, wherein said boss section (20) is located in said opening (22) of said cylinder block outer wall section (16), leaving an annular space around said boss section (20). (Figs. 2 and 3)
Claim 5
Dependent Claim
50 words
An internal combustion engine as claimed in Claim 3, wherein said boss section (20) so extends that the tip surface (20b) thereof is on the same plane as a flat surface portion (16a) of said,cylinder block outer wall surface at the location around said opening (22). (Figs. 2 and 3)
Claim 6
Dependent Claim
38 words
An internal combustion engine as claimed in Claim 4, wherein said engine knock sensor is formed with a flat surface (24a) which faces the flat surface portion (16a) of said cylinder block outer wall section (16). (Fig. 2)
Claim 7
Dependent Claim
45 words
An interanl combustion engine as claimed in Claim 5, wherein said resilient member (30) is an 0-ring located between the flat surface portion (16a) of said cylinder block outer wall section (16) and the flat surface (24a) of said engine knock sensor (24). (Fig. 2)
Claim 8
Dependent Claim
35 words
An internal combustion engine as claimed in Claim 6, wherein said engine knock sensor (24) is formed with a thin cylindrical section (28) along the periphery of which said 0-ring (30) is disposed. (Fig. 2)
Claim 9
Dependent Claim
47 words
An internal combustion engine as claimed in Claim 4, wherein further comprising a washer member (32) having a central opening (32a) through which said engine knock sensor projected section (26) is disposed, and an annular groove in which said resilient seal member (30) is disposed. (Fig. 3)
Claim 10
Dependent Claim
58 words
An internal combustion engine as claimed in Claim 8, wherein said engine knock sensor (24) is formed with a cylindrical section (28') whose diameter is larger than that of said washer member central opening (32a), said washer member (32) being located between said boss section tip surface (20b) and said engine knock sensor cylindrical section (28'). (Fig. 3)
References Cited (Backward Citations)
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