US4557241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection means having air bleed means
Assignee: Mazda Motor Corp
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Filing: 1982-02-02
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Granted: 1985-12-10
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Expires: 2002-02-02
Abstract
Abstract A fuel injection device for supercharged engine including a supercharging blower located in the intake passage upstream of the throttle valve. The fuel injection device includes a fuel injection valve located downstream of the throttle valve. An air bleed system is provided so as to inject bleed air to the fuel injected from the fuel injection valve. The air bleed system includes a bleed air passage having an upstream end opening to the intake passage between the supercharging blower and the throttle valve so that any backflow through the bleed air passage can be prevented even under a heavy load engine operation.
Inventors
- 👤 Masayuki Kawachi
- 👤 Yasushi Kono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:37
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/04; F02M69/047; F02M69/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
216 words
An intake system for internal combustion engines comprising: intake passage means provided with throttle valve means, supercharging means provided in said intake passage means upstream of the throttle valve means for compressing engine intake air to thereby supply the air under pressure to engine combustion chamber means through said throttle valve means, fuel injection means provided in said intake passage means downstream of the throttle valve means for injecting a metered amount of fuel to said intake passage means, airflow detecting means provided in said intake passage means for detecting engine intake air flow, control means responsive to an output of the airflow detecting means for controlling the amount of fuel injection from the fuel injection means in accordance with the output of the airflow detecting means, air bleed means for discharging bleed air to the fuel injected from the fuel injection means, said air bleed means including bleed air passage means separate from said intake passage means and having an upstream end opened to the intake passage means between said supercharging means and said throttle valve means and having a downstream end external and adjacent to said fuel injection means so as to discharge the bleed air directly to the fuel after it is injected into the intake passage means from the fuel injection means.
Claim 2
Dependent Claim
216 words
An intake system for internal combustion engines comprising: intake passage means provided with throttle valve means, supercharging means provided in said intake passage means upstream of the throttle valve means for compressing engine intake air to thereby supply the air under pressure to engine combustion chamber means through said throttle valve means, fuel injection means provided in said intake passage means downstream of the throttle valve means for injecting a metered amount of fuel to said intake passage means, airflow detecting means provided in said intake passage means for detecting engine intake air flow, control means responsive to an output of the airflow detecting means for controlling the amount of fuel injection from the fuel injection means in accordance with the output of the airflow detecting means, air bleed means for discharging bleed air to the fuel injected from the fuel injection means, said air bleed means including bleed air passage means separate from said intake passage means and having an upstream end opened to the intake passage means between said supercharging means and said throttle valve means and having a downstream end external and adjacent to said fuel injection means so as to discharge the bleed air directly to the fuel after it is injected into the intake passage means from the fuel injection means.
Claim 3
Dependent Claim
219 words
An intake system for internal combustion engines having engine housing means, said intake system comprising: intake passage means provided with throttle valve means, a portion of said intake passage means being formed through said engine housing means, supercharging means provided in said intake passage means upstream of the throttle valve means for compressing engine intake air to thereby supply the air under pressure through the throttle valve means, fuel injection valve mounting bore means formed in said engine housing means to open to said portion of the intake passage means downstream of said throttle valve means, socket means fitted to said bore means and having wall means formed with bleed air nozzle means penetrating said wall means, groove means formed around said socket means and communicating with said bleed air nozzle means, bleed air passage means having one end opening to said groove means and the other end to said intake passage means between said supercharging means and said throttle valve means, fuel injection valve means mounted on said socket means and having a fuel discharge end external to and located in the vicinity of said bleed air nozzle means so that bleed air from the nozzle means is discharged directly to the fuel after it is injected into the intake passage means from the fuel injection valve means.
Claim 4
Dependent Claim
219 words
An intake system for internal combustion engines having engine housing means, said intake system comprising: intake passage means provided with throttle valve means, a portion of said intake passage means being formed through said engine housing means, supercharging means provided in said intake passage means upstream of the throttle valve means for compressing engine intake air to thereby supply the air under pressure through the throttle valve means, fuel injection valve mounting bore means formed in said engine housing means to open to said portion of the intake passage means downstream of said throttle valve means, socket means fitted to said bore means and having wall means formed with bleed air nozzle means penetrating said wall means, groove means formed around said socket means and communicating with said bleed air nozzle means, bleed air passage means having one end opening to said groove means and the other end to said intake passage means between said supercharging means and said throttle valve means, fuel injection valve means mounted on said socket means and having a fuel discharge end external to and located in the vicinity of said bleed air nozzle means so that bleed air from the nozzle means is discharged directly to the fuel after it is injected into the intake passage means from the fuel injection valve means.
Claim 5
Dependent Claim
211 words
An intake system for internal combustion engines having engine housing means, said intake system comprising: intake passage means provided with throttle valve means, a portion of said intake passage means being formed through said engine housing means, supercharging means provided in said intake passage means upstream of the throttle valve means for compressing engine intake air to thereby supply the intake air under pressure through said throttle valve means, fuel injection valve mounting bore means opening to said portion of the intake passage means downstream of said throttle valve means, socket means fitted to said bore means and having wall means formed with bleed air nozzle means penetrating said wall means, groove means formed around said socket means and communicating with said bleed air nozzle means, bleed air passage means having one end opening to said groove means and the other end to said intake passage means between said supercharging means and said throttle valve means, fuel injection valve means mounted on said socket means and having a fuel discharge end external to and located adjacent to said bleed air nozzle means so that bleed air from the nozzle means is discharged directly to the fuel after it is injected into the intake passage means from the fuel injection valve means.
Claim 6
Dependent Claim
211 words
An intake system for internal combustion engines having engine housing means, said intake system comprising: intake passage means provided with throttle valve means, a portion of said intake passage means being formed through said engine housing means, supercharging means provided in said intake passage means upstream of the throttle valve means for compressing engine intake air to thereby supply the intake air under pressure through said throttle valve means, fuel injection valve mounting bore means opening to said portion of the intake passage means downstream of said throttle valve means, socket means fitted to said bore means and having wall means formed with bleed air nozzle means penetrating said wall means, groove means formed around said socket means and communicating with said bleed air nozzle means, bleed air passage means having one end opening to said groove means and the other end to said intake passage means between said supercharging means and said throttle valve means, fuel injection valve means mounted on said socket means and having a fuel discharge end external to and located adjacent to said bleed air nozzle means so that bleed air from the nozzle means is discharged directly to the fuel after it is injected into the intake passage means from the fuel injection valve means.
Claim 7
Dependent Claim
207 words
An intake system for internal combustion engines having engine housing means, said intake system comprising intake passage means provided with throttle valve means, a portion of said intake passage means being formed through said engine housing means, supercharging means provided in said intake passage means upstream of the throttle valve means for compressing engine intake air to thereby supply the air under pressure through the throttle valve means, fuel injection valve mounting bore means formed in said engine housing means to open to said portion of the intake passage means downstream of said throttle valve means, socket means fitted to said bore means and having wall means formed with bleed air nozzle means penetrating said wall means, groove means formed around said socket means and communicating with said bleed air nozzle means, bleed air passage means having one end opening to said groove means and the other end to said intake passage means between said supercharging means and said throttle valve means, fuel injection valve means mounted on said socket means and having a fuel discharge end located in the vicinity of said bleed air nozzle means so that bleed air from the nozzle means is discharged directly to fuel injected from the fuel injection valve means.
Claim 8
Dependent Claim
207 words
An intake system for internal combustion engines having engine housing means, said intake system comprising intake passage means provided with throttle valve means, a portion of said intake passage means being formed through said engine housing means, supercharging means provided in said intake passage means upstream of the throttle valve means for compressing engine intake air to thereby supply the air under pressure through the throttle valve means, fuel injection valve mounting bore means formed in said engine housing means to open to said portion of the intake passage means downstream of said throttle valve means, socket means fitted to said bore means and having wall means formed with bleed air nozzle means penetrating said wall means, groove means formed around said socket means and communicating with said bleed air nozzle means, bleed air passage means having one end opening to said groove means and the other end to said intake passage means between said supercharging means and said throttle valve means, fuel injection valve means mounted on said socket means and having a fuel discharge end located in the vicinity of said bleed air nozzle means so that bleed air from the nozzle means is discharged directly to fuel injected from the fuel injection valve means.
Claim 9
Dependent Claim
101 words
An intake system in accordance with claim 4 which further includes airflow detecting means provided in said intake passage means for detecting engine air flow, and control means responsive to an output of the airflow detecting means for controlling the amount of fuel injected from the fuel injection means in accordance with the output of the airflow detecting means, said intake passage means having a portion formed as intake pipe means, said bleed air passage means having a first portion formed in said intake passage means and a second portion formed in said housing means to open to said groove means.
Claim 10
Dependent Claim
199 words
An intake system for internal combustion engines having engine housing means, said intake system comprising intake passage means provided with throttle valve means, a portion of said intake passage means being formed through said engine housing means, supercharging means provided in said intake passage means upstream of the throttle valve means for compressing engine intake air to thereby supply the intake air under pressure through said throttle valve means, fuel injection valve mounting bore means opening to said portion of the intake passage means downstream of said throttle valve means, socket means fitted to said bore means and having wall means formed with bleed air nozzle means penetrating said wall means, groove means formed around said socket means and communicating with said bleed air nozzle means, bleed air passage means having one end opening to said groove means and the other end to said intake passage means between said supercharging means and said throttle valve means, fuel injection valve means mounted on said socket means and having a fuel discharge end located adjacent to said bleed air nozzle means so that bleed air from the nozzle means is discharged directly to fuel injected from the fuel injection valve means.
Claim 11
Dependent Claim
199 words
An intake system for internal combustion engines having engine housing means, said intake system comprising intake passage means provided with throttle valve means, a portion of said intake passage means being formed through said engine housing means, supercharging means provided in said intake passage means upstream of the throttle valve means for compressing engine intake air to thereby supply the intake air under pressure through said throttle valve means, fuel injection valve mounting bore means opening to said portion of the intake passage means downstream of said throttle valve means, socket means fitted to said bore means and having wall means formed with bleed air nozzle means penetrating said wall means, groove means formed around said socket means and communicating with said bleed air nozzle means, bleed air passage means having one end opening to said groove means and the other end to said intake passage means between said supercharging means and said throttle valve means, fuel injection valve means mounted on said socket means and having a fuel discharge end located adjacent to said bleed air nozzle means so that bleed air from the nozzle means is discharged directly to fuel injected from the fuel injection valve means.
Claim 12
Dependent Claim
16 words
An intake system in accordance with claim 6 in which said supercharging means is a turbo-supercharger.
Claim 13
Dependent Claim
59 words
An intake system in accordance with claim 6 which further includes airflow detecting means provided in said intake passage means for detecting engine air flow, and control means responsive to an output of the airflow detecting means for controlling the amount of fuel injected from the fuel injection means in accordance with the output of the airflow detecting means.
Claim 14
Dependent Claim
204 words
An intake system for internal combustion engines comprising intake passage means provided with throttle valve means, supercharging means provided in said intake passage means upstream of the throttle valve means for compressing engine intake air to thereby supply the air under pressure to engine combustion chamber means through said throttle valve means, fuel injection means provided in said intake passage means downstream of the throttle valve means for injecting a metered amount of fuel to said intake passage means, airflow detecting means provided in said intake passage means for detecting engine intake air flow, control means responsive to an output of the airflow detecting means for controlling the amount of fuel injection from the fuel injection means in accordance with the output of the airflow detecting means, air bleed means for discharging bleed air to the fuel injected from the fuel injection means, said air bleed means including bleed air passage means separate from said intake passage means and having an upstream end opened to the intake passage means between said supercharging means and said throttle valve means and a downstream end adjacent said fuel injection means so as to discharge the bleed air directly to the fuel injected from the fuel injection means.
Claim 15
Dependent Claim
204 words
An intake system for internal combustion engines comprising intake passage means provided with throttle valve means, supercharging means provided in said intake passage means upstream of the throttle valve means for compressing engine intake air to thereby supply the air under pressure to engine combustion chamber means through said throttle valve means, fuel injection means provided in said intake passage means downstream of the throttle valve means for injecting a metered amount of fuel to said intake passage means, airflow detecting means provided in said intake passage means for detecting engine intake air flow, control means responsive to an output of the airflow detecting means for controlling the amount of fuel injection from the fuel injection means in accordance with the output of the airflow detecting means, air bleed means for discharging bleed air to the fuel injected from the fuel injection means, said air bleed means including bleed air passage means separate from said intake passage means and having an upstream end opened to the intake passage means between said supercharging means and said throttle valve means and a downstream end adjacent said fuel injection means so as to discharge the bleed air directly to the fuel injected from the fuel injection means.
Claim 16
Dependent Claim
26 words
An intake system in accordance with claim 9 in which said supercharging means is turbo-supercharging means wherein driving power is given by exhaust gas turbine means.
Claim 17
Dependent Claim
44 words
An intake system in accordance with claim 9 in which said supercharger means includes blower means having blower case means provided with an outlet portion, said upstream end of the bleed air passage means opening to the outlet portion of said blower case means.
Claim 18
Dependent Claim
64 words
An intake system in accordance with claim 9 in which said supercharging means includes centrifugal type blower means having blower case means provided with an scrolled outlet portion, said upstream end of the bleed air passage means opening to the scrolled outlet portion of said blower case means so that the upstream end of the bleed air passage means is applied with ram pressure.
References Cited (Backward Citations)
DE866873C
Cited
US2995890A
Cited
US3661129A
Cited
US4047912A
Cited
JPS5460622A
Cited
JPS5471222A
Cited
US4243003A
Cited
US4311042A
Cited
JPS55164776A
Cited
US4361126A
Cited
DE3013086A1
Cited
US4351304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |