US4572128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection carburetor in internal combustion engine
Assignee: Toyota Motor Corp
•
Filing: 1984-09-12
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Granted: 1986-02-25
•
Expires: 2004-09-12
Abstract
Abstract A fuel injection carburetor in an internal combustion engine, comprising: a fuel injection valve provided at a position upstream of a throttle valve mounted in an intake passage; and an idling bypass air passage bypassing the throttle valve; wherein the range of fuel spray angle of the fuel injection valve is determined such that the fuel injection valve is disposed in such a manner that a position on the surface of the throttle valve, to which the sprayed fuel reaches, is always located at an opening forward end in the downstream direction of the throttle valve rather than an opening forward end in the upstream direction within the total throttle opening of the throttle valve from the full closing to the full opening, there are provided a bypass air valve of a wax-type provided in the idling bypass air passage and in which the higher the temperature rises, the less the flowing area of the bypass air passage is made, and a hot water passage for circulating the engine coolant from a position adjacent the opening forward end in the downstream direction of the throttle valve and through a wax portion of the bypass air valve of the wax-type, and an outlet of a bypass air passage for the idle adjustment to correct an air flow rate in the idling bypass air passage is provided on an inner wall of the intake passage on the side of the opening forward end in the upstream direction of the throttle valve.
Inventors
- 👤 Takamitsu Okamoto
- 👤 Keisou Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:42
CPC Classifications
F; F02; F02M; F02M3/00; F02M3/06; F02M69/00; F02M69/04; F02M69/042; F02M69/043; F02M69/30; F02M69/32
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
203 words
A fuel injection carburetor in an internal combustion engine, comprising: a fuel injection valve provided at a position upstream of a throttle valve and directed to the throttle valve; an idling bypass air passage, an inlet and an outlet of which are opened at a position upstream and a position downstream of the throttle valve in a throttle bore, respectively, bypassing the throttle valve; and a bypass air passage for the idle adjustment to correct air flow rate in the idling bypass air passage; wherein the range of fuel spray angle of said fuel injection valve is determined such that said fuel injection valve is disposed in such a manner that a position on the surface of the throttle valve, to which the sprayed fuel reaches, is always located at an opening forward end in the downstream direction of the throttle valve rather than an opening forward end in the upstream direction within the total throttle opening of the throttle valve from the full closing to the full opening, and an outlet of the bypass air passage for the idle adjustment is provided on an inner wall on the side of the opening forward end in the upstream direction of the throttle valve.
Claim 2
Dependent Claim
203 words
A fuel injection carburetor in an internal combustion engine, comprising: a fuel injection valve provided at a position upstream of a throttle valve and directed to the throttle valve; an idling bypass air passage, an inlet and an outlet of which are opened at a position upstream and a position downstream of the throttle valve in a throttle bore, respectively, bypassing the throttle valve; and a bypass air passage for the idle adjustment to correct air flow rate in the idling bypass air passage; wherein the range of fuel spray angle of said fuel injection valve is determined such that said fuel injection valve is disposed in such a manner that a position on the surface of the throttle valve, to which the sprayed fuel reaches, is always located at an opening forward end in the downstream direction of the throttle valve rather than an opening forward end in the upstream direction within the total throttle opening of the throttle valve from the full closing to the full opening, and an outlet of the bypass air passage for the idle adjustment is provided on an inner wall on the side of the opening forward end in the upstream direction of the throttle valve.
Claim 3
Dependent Claim
50 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 1, wherein an outlet of said idling bypass air passage is provided on the inner wall of an intake passage on the side of said opening forward end in the downstream direction of said throttle valve.
Claim 4
Dependent Claim
51 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 1, wherein the center line of the spray angle of said fuel injection valve is offset from the center axis of the throttle bore toward the opening forward end in the downstream direction of the throttle valve.
Claim 5
Dependent Claim
51 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 2, wherein the center line of the spray angle of said fuel injection valve is offset from the center axis of the throttle bore toward the opening forward end in the downstream direction of the throttle valve.
Claim 6
Dependent Claim
40 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 1, wherein the center line of the spray angle of said fuel injection valve is inclined with respect to the center axis of the throttle bore.
Claim 7
Dependent Claim
40 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 2, wherein the center line of the spray angle of said fuel injection valve is inclined with respect to the center axis of the throttle bore.
Claim 8
Dependent Claim
40 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 3, wherein the center line of the spray angle of said fuel injection valve is inclined with respect to the center axis of the throttle bore.
Claim 9
Dependent Claim
40 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 4, wherein the center line of the spray angle of said fuel injection valve is inclined with respect to the center axis of the throttle bore.
Claim 10
Dependent Claim
54 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 5, wherein said fuel injection valve is disposed such that the center line of the spray angle passes through the opening forward end in the downstream direction of said throttle valve rather than the center axis of said throttle bore.
Claim 11
Dependent Claim
54 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 6, wherein said fuel injection vlve is disposed such that the center line of the spray angle passes through the opening forward end in the downstream direction of said throttle valve rather than the center axis of said throttle bore.
Claim 12
Dependent Claim
54 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 7, wherein said fuel injection valve is disposed such that the center line of the spray angle passes through the opening forward end in the downstream direction of said throttle valve rather than the center axis of said throttle bore.
Claim 13
Dependent Claim
54 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 8, wherein said fuel injection valve is disposed such that the center line of the spray angle passes through the opening forward end in the downstream direction of said throttle valve rather than the center axis of said throttle bore.
Claim 14
Dependent Claim
251 words
A fuel injection carburetor in an internal combustion engine, comprising: a fuel injection valve provided at a position upstream of a throttle valve and directed to the throttle valve; an idling bypass air passage, an inlet and an outlet of which are opened at a position upstream and a position downstream of the throttle valve in a throttle bore, respectively, bypassing the throttle valve; and a bypass air passage for the idle adjustment to correct air flow rate in the idling bypass air passsage; wherein the range of fuel spray angle of said fuel injection valve is determined such that said fuel injection valve is disposed in such a manner that a position on the surface of the throttle valve, to which the sprayed fuel reaches, is always located at an opening forward end in the downstream direction of the throttle valve rather than an opening forward end in the upstream direction within the total throttle opening of the throttle valve from the full closing to the full opening, and there are provided a bypass air valve of a wax-type provided in the intermediate portion of the idling bypass air passage and in which the higher the temperature rises, the less the flowing area of the bypass air passage is made, and a hot water passage for circulating the engine coolant from a position adjacent the opening forward end in the downstream direction of the throttle valve and through a wax portion of the bypass air valve of the wax type.
Claim 15
Dependent Claim
251 words
A fuel injection carburetor in an internal combustion engine, comprising: a fuel injection valve provided at a position upstream of a throttle valve and directed to the throttle valve; an idling bypass air passage, an inlet and an outlet of which are opened at a position upstream and a position downstream of the throttle valve in a throttle bore, respectively, bypassing the throttle valve; and a bypass air passage for the idle adjustment to correct air flow rate in the idling bypass air passsage; wherein the range of fuel spray angle of said fuel injection valve is determined such that said fuel injection valve is disposed in such a manner that a position on the surface of the throttle valve, to which the sprayed fuel reaches, is always located at an opening forward end in the downstream direction of the throttle valve rather than an opening forward end in the upstream direction within the total throttle opening of the throttle valve from the full closing to the full opening, and there are provided a bypass air valve of a wax-type provided in the intermediate portion of the idling bypass air passage and in which the higher the temperature rises, the less the flowing area of the bypass air passage is made, and a hot water passage for circulating the engine coolant from a position adjacent the opening forward end in the downstream direction of the throttle valve and through a wax portion of the bypass air valve of the wax type.
Claim 16
Dependent Claim
50 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 13, wherein the outlet of said idling bypass air passage is provided on an inner wall of the intake passage on the side of the opening forward end in the upstream direction of said throttle valve.
Claim 17
Dependent Claim
65 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 13, wherein the outlet of the bypass air passage for the idle adjustment to correct an air flow rate in the idling bypass air passage is provided on an inner wall of the intake passage on the side of the opening forward end in the upstream direction of said throttle valve.
Claim 18
Dependent Claim
64 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 14, wherein the outlet of the bypass air passage for the idle adjustment to correct an air flowrate in the idling bypass air passage is provided on an inner wall of the intake passage on the side of the opening forward end in the upstream direction of said throttle valve.
Claim 19
Dependent Claim
51 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 13, wherein the center line of the spray angle of said fuel injection valve is offset from the center axis of the throttle bore toward the opening forward end in the downstream direction of the throttle valve.
Claim 20
Dependent Claim
51 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 14, wherein the center line of the spray angle of said fuel injection valve is offset from the center axis of the throttle bore toward the opening forward end in the downstream direction of the throttle valve.
Claim 21
Dependent Claim
51 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 15, wherein the center line of the spray angle of said fuel injection valve is offset from the center axis of the throttle bore toward the opening forward end in the downstream direction of the throttle valve.
Claim 22
Dependent Claim
51 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 16, wherein the center line of the spray angle of said fuel injection valve is offset from the center axis of the throttle bore toward the opening forward end in the downstream direction of the throttle valve.
Claim 23
Dependent Claim
40 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 13, wherein the center line of the spray angle of said fuel injection valve is inclined with respect to the center axis of the throttle bore.
Claim 24
Dependent Claim
40 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 14, wherein the center line of the spray angle of said fuel injection valve is inclined with respect to the center axis of the throttle bore.
Claim 25
Dependent Claim
40 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 15, wherein the center line of the spray angle of said fuel injection valve is inclined with respect to the center axis of the throttle bore.
Claim 26
Dependent Claim
40 words
A fuel injection carburetor in an internal combustion engine as set forth in claim 16, wherein the center line of the spray angle of said fuel injection valve is inclined with respect to the center axis of the throttle bore.
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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) | 1989-02-24 | 1989-08-26 | 1990-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-24 | 1993-08-26 | 1994-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-24 | 1997-08-26 | 1998-02-25 | $7700.00 | Window Closed / Lapsed |