Patent US3577963A successfully refreshed from Google Patents.
US3577963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for internal combustion engines
Assignee: Volkswagen AG
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Filing: 1968-05-17
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Granted: 1971-05-11
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Expires: 1988-05-17
Abstract
Abstract A distributor for internal combustion engines having a centrifugally operated and a vacuum operated spark timing control with a switch in the primary circuit of an ignition coil operated by a throttle valve and the switch connected to a circuit breaker system controlled by centrifugal operation and a further circuit breaker system connected and influenced by a vacuum operated control.
Inventors
- 👤 Rudolf Bechmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:11
CPC Classifications
A; A47; A47J; A47J37/00; A47J37/04; A47J37/041; F; F02; F02P; F02P5/00; F02P5/04; F02P5/05; F02P5/10; F02P5/103; F02P5/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
217 words
An ignition distributor for a spark ignition engine comprising two cams driven in timed relation with the engine, a pair of circuit breakers operated independently each of them by one of said cams, engine speed responsive means connected with one of said cams to retard the timed opening of the first of said circuit breakers with decreases in engine speed, a vacuumoperated control connected to said distributor and operated by pressures sensed in the induction system of said engine to adjust the timed opening of the second of said circuit breakers according to engine load and speed throughout a range of throttle open positions in which timed opening of the second of said circuit breakers is advanced with respect to the timing of the first when the engine is idling with the throttle closed, parallel circuits connecting each circuit breaker with the primary of the ignition coil, switch means in each of said parallel circuits, and means for operating said switch means to close one of said parallel connected circuits to the first said circuit breaker and open the other with the throttle closed to idle positions and to close the other of said parallel connected circuits to the second said circuit breaker and open the other with the throttle in the said range of open positions.
Claim 2
Dependent Claim
217 words
An ignition distributor for a spark ignition engine comprising two cams driven in timed relation with the engine, a pair of circuit breakers operated independently each of them by one of said cams, engine speed responsive means connected with one of said cams to retard the timed opening of the first of said circuit breakers with decreases in engine speed, a vacuumoperated control connected to said distributor and operated by pressures sensed in the induction system of said engine to adjust the timed opening of the second of said circuit breakers according to engine load and speed throughout a range of throttle open positions in which timed opening of the second of said circuit breakers is advanced with respect to the timing of the first when the engine is idling with the throttle closed, parallel circuits connecting each circuit breaker with the primary of the ignition coil, switch means in each of said parallel circuits, and means for operating said switch means to close one of said parallel connected circuits to the first said circuit breaker and open the other with the throttle closed to idle positions and to close the other of said parallel connected circuits to the second said circuit breaker and open the other with the throttle in the said range of open positions.
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |