EP0096842A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fuel injector body assembly
Assignee: Hitachi Ltd
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Filing: 1983-06-08
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Granted: —
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Expires: 2003-06-08
Abstract
Abstract A fuel injector body assembly including an injector (7) located upstream of a throttle chamber (2) connected to a venturi chamber (5) formed with a venturi (6). An air chamber (2) is connected to an upstream end of the venturi chamber, and a bypass passageway (13) in the form of an arc is located at the interface between the venturi chamber and the air chamber and has a hotwire air flow meter (6) is mounted therein.
Inventors
- 👤 Kimiji Karino
- 👤 Tokuo Kosuge
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 06:54
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/16; F02M69/18; F02M69/46; F02M69/48
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
167 words
A fuel injector body assembly comprising: (a) an air chamber (4) connected at one end thereof to an air cleaner (3); (b) a venturi chamber (5) joined to the other end of said air chamber and secured in place; (c) a throttle chamber (2) having a throttle valve (1) connected to an end of the venturi chamber opposite the end thereof to which said air chamber is joined; (d) an injector (7) mounted in the vicinity of the center of an air conduit (12) constituted by said air chamber and said venturi chamber for air to flow therethrough; (e) a bypass passageway (13) having an inlet (14, 20, 21, 23, 24) opening on the upstream side of said venturi chamber and an outlet (15) opening in said venturi chamber, said bypass chamber being formed between said air chamber and said venturi chamber when said two chambers are joined together to connect said inlet with said outlet; and (f) an air flow meter mounted in said bypass passageway.
Claim 2
Dependent Claim
167 words
A fuel injector body assembly comprising: (a) an air chamber (4) connected at one end thereof to an air cleaner (3); (b) a venturi chamber (5) joined to the other end of said air chamber and secured in place; (c) a throttle chamber (2) having a throttle valve (1) connected to an end of the venturi chamber opposite the end thereof to which said air chamber is joined; (d) an injector (7) mounted in the vicinity of the center of an air conduit (12) constituted by said air chamber and said venturi chamber for air to flow therethrough; (e) a bypass passageway (13) having an inlet (14, 20, 21, 23, 24) opening on the upstream side of said venturi chamber and an outlet (15) opening in said venturi chamber, said bypass chamber being formed between said air chamber and said venturi chamber when said two chambers are joined together to connect said inlet with said outlet; and (f) an air flow meter mounted in said bypass passageway.
Claim 3
Dependent Claim
40 words
A fuel injector body assembly as claimed in claim 1, wherein said bypass passage is located in a cross section at right angles to an air current and conforming in configuration to an inner peripheral wall of the air conduit.
Claim 4
Dependent Claim
46 words
A fuel injector body assembly as claimed in claim 1, wherein said air conduit has a circular cross section located at right angles to an air current, and said bypass passageway is in the form of an arc centered at the center of said air conduit.
Claim 5
Dependent Claim
33 words
A fuel injector body assembly as claimed in claim 3, wherein said inlet of said bypass passageway opens in the inner peripheral wall of said air conduit in the form of an arc.
Claim 6
Dependent Claim
31 words
A fuel injector body assembly as claimed in claim 4, wherein said inlet opens in such a manner that it is disposed against an air current flowing through said air conduit.
Claim 7
Dependent Claim
49 words
A fuel injector body assembly as claimed in claim 1, wherein said injector is held between an upper injector support (9) located on upper support arms (11A) secured to said air chamber and a lower injector support (10) located on lower support arms (11B) secured to said venturi chamber.
Claim 8
Dependent Claim
29 words
A fuel injector body assembly as claimed in claim 6, further comprising a fuel pipe (19) located in said lower support arms for feeding a fuel into said injector.
Claim 9
Dependent Claim
74 words
A fuel injector body assembly as claimed in claim 1, wherein said injector is held between an upper injector support (9) located on upper support arms (11A) secured to said air chamber and a lower injector support (10) located on lower support arms (11B) secured to said venturi chamber, and said inlet (23) of said bypass passageway opens in said upper injector support through an inlet portion (22) formed in said upper support arms.
Claim 10
Dependent Claim
34 words
A fuel injector body assembly as claimed in claim 8, wherein said inlet (23) opening in said upper injector support is disposed at right angles to an air current flowing through said air conduit.
Claim 11
Dependent Claim
36 words
A fuel injector body assembly as claimed in claim 9, wherein said upper injector support is formed with an annular wall portion (25) located at right angles to the direction in which said inlet (24) opens.
Claim 12
Dependent Claim
34 words
A fuel injector body assembly as claimed in claim 1, wherein an air insulator (I 1 ) for avoiding air leaks is mounted at the interface between said air chamber and said venturi chamber.
Claim 13
Dependent Claim
48 words
A fuel injector body assembly as claimed in claim 1, wherein said throttle chamber having said throttle valve is connected through an insulator (I 2 ) for avoiding heat transfer to the end of the venturi chamber opposite the end thereof to which said air chamber is joined.
Claim 14
Dependent Claim
28 words
A fuel injector body assembly as claimed in claim 12, wherein a groove (18) is formed in said throttle chamber to allow cooling water to flow in circulation.
Claim 15
Dependent Claim
29 words
A fuel injector body assembly as claimed in claim 1, wherein an air flow rate measuring circuit (17) is mounted on an outer wall surface of said venturi chamber.
References Cited (Backward Citations)
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