US3593693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark timing control for vehicle engines
Assignee: Volkswagen AG
•
Filing: 1968-12-17
•
Granted: 1971-07-20
•
Expires: 1988-12-17
Abstract
Abstract Ignition distributor spark timing control having a common control disc mounting, a retarded spark interrupter connected in series with two series-connected switches, respectively operated by throttle valve position and engine speed, and an advanced spark second interrupter shunted across the first-mentioned interrupter and the two switches.
Inventors
- 👤 Dietrich Seelmann-Eggebert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:12
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/145; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
131 words
An ignition distributor spark timing control for a vehicle internal combustion engine having a throttle valve for controlling its speed, comprising a first switch (4) operated in dependence on the position of the throttle valve to be closed and opened respectively with the throttle valve; a second switch (5) operated in dependence on the engine speed to be closed at idling speed of the engine and to open when the speed of the engine increases above idling, said second switch being connected in series with the said first switch; a first spark interrupter connected in series with said first and second switches and having a retarded setting; and a second spark interrupter (2) having an advanced setting and connected in parallel with said first and second switches and said first interrupter.
Claim 2
Dependent Claim
131 words
An ignition distributor spark timing control for a vehicle internal combustion engine having a throttle valve for controlling its speed, comprising a first switch (4) operated in dependence on the position of the throttle valve to be closed and opened respectively with the throttle valve; a second switch (5) operated in dependence on the engine speed to be closed at idling speed of the engine and to open when the speed of the engine increases above idling, said second switch being connected in series with the said first switch; a first spark interrupter connected in series with said first and second switches and having a retarded setting; and a second spark interrupter (2) having an advanced setting and connected in parallel with said first and second switches and said first interrupter.
Claim 3
Dependent Claim
35 words
An ignition distributor spark timing control as defined in claim 1, including an ignition coil connected in series with said first and second switches and said first spark interrupter, and with said second spark interrupter.
References Cited (Backward Citations)
US1663207A
Cited
US1861417A
Cited
US1759425A
Cited
US1886566A
Cited
US1882720A
Cited
US2712814A
Cited
US3252451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |