US4060199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic fuel injection valve
Assignee: Robert Bosch GmbH
•
Filing: 1976-09-29
•
Granted: 1977-11-29
•
Expires: 1996-09-29
Abstract
Abstract An electromagnetic fuel injection valve in which a valve needle coupled to the armature has twisting channels for carrying fuel and for creating turbulence therein. The channels terminate in a pressure chamber whose volume is chosen to be equal to or smaller than the volume of fuel injected in a single stroke.
Inventors
- 👤 Gerhard Brune
- 👤 Waldemar Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:02
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/16; F02M61/162; F02M61/163; F02M51/00; F02M51/06; F02M51/061; F02M51/0625; F02M51/0664; F02M51/0671; F02M51/0675; F02M51/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
108 words
In an electromagnetic fuel injection valve which includes a casing, a magnetic coil, a stationary iron core within said coil and a movable armature moving axially with said core within said casing and provided with a valve closing needle guided by portions of said casing for cooperation with an injection orifice obturated by said valve needle, the improvement comprising: said valve needle is provided with a plurality of curved channels for carrying fuel and for imparting turbulence thereto; and said casing and said valve needle together define a pressure chamber whose maximum volume is no greater than the volume of fuel from said valve during a single stroke.
Claim 2
Dependent Claim
108 words
In an electromagnetic fuel injection valve which includes a casing, a magnetic coil, a stationary iron core within said coil and a movable armature moving axially with said core within said casing and provided with a valve closing needle guided by portions of said casing for cooperation with an injection orifice obturated by said valve needle, the improvement comprising: said valve needle is provided with a plurality of curved channels for carrying fuel and for imparting turbulence thereto; and said casing and said valve needle together define a pressure chamber whose maximum volume is no greater than the volume of fuel from said valve during a single stroke.
Claim 3
Dependent Claim
29 words
An electromagnetic valve as defined by claim 1, wherein, when said valve is open, the axial extremity of said valve needle lies without the injection orifice of said valve.
Claim 4
Dependent Claim
28 words
An electromagnetic valve as defined by claim 1, wherein said pressure chamber lies upstream of, and adjacent to, said injection orifice and is traversed by said valve needle.
Claim 5
Dependent Claim
26 words
An electromagnetic valve as defined by claim 3, wherein said curved channels are so disposed on said valve needle as to terminate in said pressure chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |