US3554092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition system for multicylinder rotary piston engine
Assignee: Mazda Motor Corp
•
Filing: 1968-11-22
•
Granted: 1971-01-12
•
Expires: 1988-11-22
Abstract
Abstract An ignition system for a multicylinder engine has two ignition coils energized by an electrical source to generate two igniting voltages substantially at the same time. A plurality of trailing ignition plugs, one for each cylinder, are connected to one of the two ignition coils through a synchronously operable distributor for timed sequential energization, and a plurality of leading ignition plugs are connected in series to the other of the two ignition coils for simultaneous ignition.
Inventors
- 👤 Masao Shibagaki
- 👤 Masayoshi Onishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:33
CPC Classifications
F; F02; F02P; F02P15/00; F02P15/001; F02P15/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
121 words
In an ignition system for a two-cylinder rotary piston engine the improvement comprising: trailing ignition plugs and leading ignition plugs, at least two ignition coils, one of said trailing ignition plugs being mounted in each of the cylinders together with one of said leading ignition plugs, means for connecting said leading ignition plugs to one ignition coil to energize all the ignition plugs connected thereto each time the ignition is to be effected in any of the cylinders and distributor means for connecting said trailing ignition plugs to another ignition coil for successive energization, and means for delaying the ignition by each of said trailing ignition plugs a slight time lag from the ignition of the leading ignition plug corresponding thereto.
Claim 2
Dependent Claim
121 words
In an ignition system for a two-cylinder rotary piston engine the improvement comprising: trailing ignition plugs and leading ignition plugs, at least two ignition coils, one of said trailing ignition plugs being mounted in each of the cylinders together with one of said leading ignition plugs, means for connecting said leading ignition plugs to one ignition coil to energize all the ignition plugs connected thereto each time the ignition is to be effected in any of the cylinders and distributor means for connecting said trailing ignition plugs to another ignition coil for successive energization, and means for delaying the ignition by each of said trailing ignition plugs a slight time lag from the ignition of the leading ignition plug corresponding thereto.
Claim 3
Dependent Claim
114 words
In an ignition system for a multicylinder rotary piston engine having at least two rotary pistons, the improvement comprising: one leading ignition plug mounted at an appropriate position in each of the cylinders, one trailing ignition plug mounted in each of the cylinders behind said leading ignition plug in the direction of rotation of the piston, at least two ignition coils each adapted to generate an ignition voltage by switching means, a single distributor operated synchronously with said switching means, said trailing ignition plugs of all cylinders connected to one of said ignition coils through said distributor and said leading ignition plugs of all cylinders connected directly to the other of said ignition coils.
Claim 4
Dependent Claim
114 words
In an ignition system for a multicylinder rotary piston engine having at least two rotary pistons, the improvement comprising: one leading ignition plug mounted at an appropriate position in each of the cylinders, one trailing ignition plug mounted in each of the cylinders behind said leading ignition plug in the direction of rotation of the piston, at least two ignition coils each adapted to generate an ignition voltage by switching means, a single distributor operated synchronously with said switching means, said trailing ignition plugs of all cylinders connected to one of said ignition coils through said distributor and said leading ignition plugs of all cylinders connected directly to the other of said ignition coils.
Claim 5
Dependent Claim
28 words
The ignition system as set forth in Claim 2 wherein means are provided to discharge said trailing ignition plug and said leading ignition plug simultaneously for all cylinders.
Claim 6
Dependent Claim
32 words
The ignition system as set forth in Claim 2, wherein means are provided to discharge said trailing ignition plug after a slight time lag from said leading ignition plug in each cylinder.
Claim 7
Dependent Claim
32 words
The ignition system as set forth in Claim 2 wherein means are provided to discharge said leading ignition plug after a slight time lag from said trailing ignition plug in each cylinder.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |