US3613644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection device
Assignee: Dr Ing HCF Porsche AG
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Filing: 1969-05-12
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Granted: 1971-10-19
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Expires: 1989-05-12
Abstract
Abstract A fuel injection installation, especially for multicylinder internal combustion engines with at least one electromagnetically actuated injection valve and an energy storage device in the load circuit which is triggered in dependence on the rotational speed and in which the discharge of the energy storage device acting on the electromagnet of the injection valve is limited by a control device to a value above the holding current of the injection valve.
Inventors
- 👤 Ferdinand Anton Ernst Porsche
- 👤 Paul Breyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:59
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/20; F02D2041/2003; F02D2041/2006; F02D2041/2013; F02D2041/202; F02D2041/2058
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
192 words
A fuel injection apparatus, especially for a multicylinder internal combustion engine comprising: at least one electromagnetically actuated injection valve means; energy storage means for storing the energy to be used in actuating said injection valve means, said injection valve means forming a portion of the discharge circuit for said energy storage means; means, responsive to the rotational speed of the engine for triggering the discharge of said energy storage means; and first control means for limiting the discharge of energy from said energy storage means through said electromagnetically actuated injection valve means to a value above the amount of energy required for holding said injection valve means open, said control means including electric-comparison-measuring means for comparing the value of the energy being discharged from said storage means through said electromagnetically actuated injection valve means with a reference value of energy, whereby the discharge of energy from said storage means will be limited when the value of said energy reaches said value above said amount of holding energy, to thereby provide precise control of the duration of time during which said electromagnetically actuated injectiOn valve means supplies fuel to said internal combustion engine.
Claim 2
Dependent Claim
192 words
A fuel injection apparatus, especially for a multicylinder internal combustion engine comprising: at least one electromagnetically actuated injection valve means; energy storage means for storing the energy to be used in actuating said injection valve means, said injection valve means forming a portion of the discharge circuit for said energy storage means; means, responsive to the rotational speed of the engine for triggering the discharge of said energy storage means; and first control means for limiting the discharge of energy from said energy storage means through said electromagnetically actuated injection valve means to a value above the amount of energy required for holding said injection valve means open, said control means including electric-comparison-measuring means for comparing the value of the energy being discharged from said storage means through said electromagnetically actuated injection valve means with a reference value of energy, whereby the discharge of energy from said storage means will be limited when the value of said energy reaches said value above said amount of holding energy, to thereby provide precise control of the duration of time during which said electromagnetically actuated injectiOn valve means supplies fuel to said internal combustion engine.
Claim 3
Dependent Claim
28 words
A fuel injection apparatus according to claim 1, characterized in that the first control means limits the discharge of the energy storage means up to a constant value.
Claim 4
Dependent Claim
37 words
A fuel injection apparatus according to claim 1 further including a second control means, connected with said first control means for changing the duration of time of the energization of the electromagnet which actuates said injection valve.
Claim 5
Dependent Claim
42 words
A fuel injection apparatus according to claim 1, further including a charging circuit for supplying energy to said energy storage means, and further including third control means connected with said first control means for controlling the charging of said energy storage means.
Claim 6
Dependent Claim
43 words
A fuel injection apparatus according to claim 4, wherein said first control means is responsive to the output of said rotational speed dependent trigger means, whereby first control means limits the discharge of said energy storage means in dependence on said trigger means.
Claim 7
Dependent Claim
28 words
A fuel injection apparatus according to claim 5, characterized in that the first control means limits the discharge of the energy storage means up to a constant value.
Claim 8
Dependent Claim
38 words
A fuel injection apparatus according to claim 5, further including a second control means connected with said first control means for changing the duration of time of the energization of the electromagnet which actuates said injection valve means.
Claim 9
Dependent Claim
29 words
A fuel injection apparatus according to claim 1, wherein said energy storage means comprises a variable capacitor for controlling the duration of the discharge of the energy storage means.
Claim 10
Dependent Claim
69 words
A fuel injection apparatus according to claim 1, wherein said energy storage means comprises capacitive storage means and further including a parallel connected resistor-capacitor network connected to said first control means and said electromagnetically actuated injection valve means in said discharge circuit, said resistor disposed in said network being variable by at least one parameter of the internal combustion engine in response to an output from said triggering means.
Claim 11
Dependent Claim
64 words
A fuel injection apparatus according to claim 1, wherein said energy storage means comprises an inductive storage means and further including switch means in the charging circuit of the inductive storage means and wherein said triggering means includes a further control means for delivering pulses to said switch means to control the opening and closing thereof in response to additional parameters of said engine.
Claim 12
Dependent Claim
33 words
A fuel injection apparatus according to claim 11, wherein said switch means in the charging circuit of the inductive storage means is triggered by the first control means for limiting the storage discharge.
Claim 13
Dependent Claim
48 words
A fuel injection apparatus according to claim 12, further including means dependent on the rotational speed for changing the duration of the energization of the electromagnet of the injection valve, characterized in that said changing means controls said switch means in the charging circuit of the storage means.
Claim 14
Dependent Claim
25 words
A fuel injection apparatus according to claim 13, wherein said switch means is connected both in the charging and discharge circuits of said storage means.
Claim 15
Dependent Claim
35 words
A fuel injection apparatus according to claim 13, wherein the switch means in the charging circuit and switch means in the discharge circuit are influenced in dependence of difference parameters of the internal combustion engine.
Claim 16
Dependent Claim
48 words
A fuel injection apparatus according to claim 11, further including means dependent on the rotational speed for changing the duration of the energization of the electromagnet of the injection valve, characterized in that said changing means controls said switch means in the charging circuit of the storage means.
Claim 17
Dependent Claim
21 words
A fuel injection apparatus according to claim 16, wherein said switch means is connected both in the charging and discharge circuits.
Claim 18
Dependent Claim
35 words
A fuel injection apparatus according to claim 16, wheRein the switch means in the charging circuit and switch means in the discharge circuit are influenced in dependence of different parameters of the internal combustion engine.
Claim 19
Dependent Claim
18 words
A fuel injection apparatus according to claim 18, wherein each of said switch means is a transistor switch.
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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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |