US4794885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intake apparatus for internal combustion engine
Assignee: Mazda Motor Corp
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Filing: 1987-08-19
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Granted: 1989-01-03
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Expires: 2007-08-19
Abstract
Abstract An intake apparatus for an in-line type internal combustion engine having an elongated surge tank extending the full extension of the in-line cylinders of the engine. Intake passages connect the surge tank with the in-line engine cylinders. A throttle body is secured to one side surface of the surge tank. The registering and connected surfaces of the surge tank and the throttle body are mutually inclined an angle θ with respect to the medial plane or axes of the in-line cylinders.
Inventors
- 👤 Yasuo Honda
- 👤 Takenori Ohtsuka
- 👤 Tomohiro Sunada
- 👤 Yasuhiro Kawasako
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:16
CPC Classifications
F; F02; F02M; F02M35/00; F02M35/10; F02M35/10006; F02M35/10026; F02M35/10032; F02B; F02B27/00; F02B27/02; F02B27/0205; F02B27/0215; F02B27/0226; F02B27/0268; F02B27/0273; F02B75/00; F02B75/16; F02B75/18; F02B75/20; F02M35/10052; F02M35/10209; F02M35/10229; F02M35/10216; F02M35/104; F02M35/112; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
149 words
An intake apparatus for an internal combustion engine comprising: (a) an internal combustion engine having a plurality of in-line cylinders, (b) intake passage means for supplying intake air to the engine cylinders including a surge tank having a side surface with an opening defined therein, (c) throttle body means having an end surface defining an exit therein, (d) connecting means for connecting said end surface and said side surface with said exit and said opening in communication and with the joint between said surfaces inclined with respect to the cylinders' axes, (e) said throttle body means being connected to both upper and lower corners of said surge tank, the lower end of said throttle body means being connected to the lower corner of said surge tank through an elongated bottom portion formed at the bottom of said surge tank, said elongated bottom portion having an inner V-shaped bottom surface.
Claim 2
Dependent Claim
149 words
An intake apparatus for an internal combustion engine comprising: (a) an internal combustion engine having a plurality of in-line cylinders, (b) intake passage means for supplying intake air to the engine cylinders including a surge tank having a side surface with an opening defined therein, (c) throttle body means having an end surface defining an exit therein, (d) connecting means for connecting said end surface and said side surface with said exit and said opening in communication and with the joint between said surfaces inclined with respect to the cylinders' axes, (e) said throttle body means being connected to both upper and lower corners of said surge tank, the lower end of said throttle body means being connected to the lower corner of said surge tank through an elongated bottom portion formed at the bottom of said surge tank, said elongated bottom portion having an inner V-shaped bottom surface.
Claim 3
Dependent Claim
167 words
An intake apparatus for an internal combustion engine comprising: (a) an internal combustion engine having a plurality of in-line cylinders, (b) intake passage means for supplying intake air to the engine cylinders including a surge tank having a side surface with an opening defined therein, (c) throttle body means having an end surface defining an exit therein, (d) connecting means for connecting said end surface and said side surface with said exit and said opening in communication and with the joint between said surfaces inclined with respect to the cylinders' axes, (e) said throttle body means being connected to both upper and lower corners of said surge tank, the lower end of said throttle body means being connected to the lower corner of said surge tank through an elongated bottom portion formed at the bottom of said surge tank, said throttle body means being a two-bore throttle body having a primary passage and a secondary passage, and said secondary passage being arranged lower than said primary passage.
Claim 4
Dependent Claim
167 words
An intake apparatus for an internal combustion engine comprising: (a) an internal combustion engine having a plurality of in-line cylinders, (b) intake passage means for supplying intake air to the engine cylinders including a surge tank having a side surface with an opening defined therein, (c) throttle body means having an end surface defining an exit therein, (d) connecting means for connecting said end surface and said side surface with said exit and said opening in communication and with the joint between said surfaces inclined with respect to the cylinders' axes, (e) said throttle body means being connected to both upper and lower corners of said surge tank, the lower end of said throttle body means being connected to the lower corner of said surge tank through an elongated bottom portion formed at the bottom of said surge tank, said throttle body means being a two-bore throttle body having a primary passage and a secondary passage, and said secondary passage being arranged lower than said primary passage.
Claim 5
Dependent Claim
129 words
An intake apparatus for an internal combustion engine comprising: (a) an internal combustion engine having a plurality of in-line cylinders, (b) intake passage means for supplying intake air to the engine cylinders including a surge tank having a side surface with an opening defined therein, (c) throttle body means having an end surface defining an exit therein, (d) connecting means for connecting said end surface and said side surface with said exit and said opening in communication and with the joint between said surfaces inclined with respect to the cylinders' axes, said connected end and side surfaces being inclined with respect to the cylinders' axes in such a manner that the weight of said throttle body means imposes a compressive stress on said side surface of said surge tank.
Claim 6
Dependent Claim
129 words
An intake apparatus for an internal combustion engine comprising: (a) an internal combustion engine having a plurality of in-line cylinders, (b) intake passage means for supplying intake air to the engine cylinders including a surge tank having a side surface with an opening defined therein, (c) throttle body means having an end surface defining an exit therein, (d) connecting means for connecting said end surface and said side surface with said exit and said opening in communication and with the joint between said surfaces inclined with respect to the cylinders' axes, said connected end and side surfaces being inclined with respect to the cylinders' axes in such a manner that the weight of said throttle body means imposes a compressive stress on said side surface of said surge tank.
Claim 7
Dependent Claim
72 words
An intake apparatus as defined in claim 3 in which said intake passage means defines an intake passage which connects said surge tank with intake ports formed in engine cylinders, said surge tank being located above the engine cylinders, said intake passage extending from the surge tank in a direction away from the engine cylinders and then is curved downwardly below the surge tank in a U-shaped manner toward the intake ports.
Claim 8
Dependent Claim
44 words
An intake apparatus as defined in claim 4 in which said connected end and side surfaces are inclined with respect to the cylinders' axes in such a manner that the lower end thereof is nearer to the cylinders' axes than the upper end thereof.
Claim 9
Dependent Claim
36 words
An intake apparatus as defined in claim 3 in which said surge tank extends longitudinally approximately the extension of the engine and said throttle body means is connected to a central portion of said surge tank.
Claim 10
Dependent Claim
26 words
An intake apparatus as defined in claim 3 in which said throttle body means is connected to both upper and lower corners of said surge tank.
Claim 11
Dependent Claim
32 words
An intake apparatus as defined in claim 7 in which said throttle body means is a two-bore throttle body arranged in a longitudinal direction having a primary passage and a secondary passage.
Claim 12
Dependent Claim
41 words
An intake apparatus as defined in claim 7 in which the lower end of said throttle body means is connected to the lower corner of said surge tank through an elongated bottom portion formed at the bottom of said surge tank.
Claim 13
Dependent Claim
20 words
An intake apparatus as defined in claim 9 in which said elongated bottom portion has an inner V-shaped bottom surface.
Claim 14
Dependent Claim
38 words
An intake apparatus as defined in claim 9 in which said throttle body means is a two-bore throttle body having a primary passage and a secondary passage, and said secondary passage is arranged lower than said primary passage.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |