Patent US4102181A successfully refreshed from Google Patents.
US4102181A
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US
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Procedure for determining the starting point of fuel injection especially for running internal-combustion engines
Assignee: Autoipari Kutato Intezet
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Filing: 1976-12-21
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Granted: 1978-07-25
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Expires: 1996-12-21
Abstract
Abstract Process for determining the starting point of fuel injection in internal-combustion engines having a fuel-injection nozzle with a housing and a needle valve and a displacement limited by a stroke limiter, comprising the steps of observing and consecutively registering vibrations and/or noise phenomena arising from abutments of the needle in the valve against the stroke limiter, and selecting the leading branch or ascending flank of a first half-wave signal from that vibration, the registering being accomplished with a sensing element placed at least in the vicinity of the nozzle housing. Several additional, optional features are disclosed.
Inventors
- 👤 Gyula Cser
- 👤 Geza Mizser
- 👤 Peter Rausnitz
- 👤 Zoltan Szekely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:03
CPC Classifications
F; F02; F02M; F02M65/00; F02M65/005
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
A process for determining the starting point of fuel injection in internal-combustion engines having a fuel-injection nozzle with a housing and a needle valve and a displacement limited by a stroke limiter, comprising the steps of: observing and consecutively registering vibrations and other noise phenomena arising from abutments of the needle in the valve against the stroke limiter, or full opening of the needle valve; and selecting the ascending flank of a first half-wave signal from that vibration; the registering being accomplished with a sensing element placed at least in the vicinity of the nozzle housing.
Claim 2
Dependent Claim
96 words
A process for determining the starting point of fuel injection in internal-combustion engines having a fuel-injection nozzle with a housing and a needle valve and a displacement limited by a stroke limiter, comprising the steps of: observing and consecutively registering vibrations and other noise phenomena arising from abutments of the needle in the valve against the stroke limiter, or full opening of the needle valve; and selecting the ascending flank of a first half-wave signal from that vibration; the registering being accomplished with a sensing element placed at least in the vicinity of the nozzle housing.
Claim 3
Dependent Claim
49 words
The process as defined in claim 1, further comprising the steps of comparing a first received signal, that indicates the opening of the nozzle, with a reference signal that represents a known angular position characteristic of the engine operation; and determining a pre-injection angle by generating a differential parameter.
Claim 4
Dependent Claim
23 words
The process as defined in claim 2, wherein the angular position is the dead center position of the main shaft of the engine.
Claim 5
Dependent Claim
14 words
The process as defined in claim 2, wherein the differential parameter relates to time.
Claim 6
Dependent Claim
23 words
The process as defined in claim 2, wherein the differential parameter relates to the angular displacement of the main shaft of the engine.
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) | 1981-07-24 | 1982-01-23 | 1982-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-24 | 1986-01-23 | 1986-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-24 | 1990-01-23 | 1990-07-25 | $7700.00 | Window Closed / Lapsed |