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US3556064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air pollution preventive device for spark-ignition-type internal combustion engines
Assignee: Honda Motor Co Ltd
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Filing: 1969-04-01
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Granted: 1971-01-19
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Expires: 1989-04-01
Abstract
Abstract A device is provided for an internal combustion engine to prevent air pollution thereby and the device comprises a throttle-valve-actuating member connected to a throttle valve vacuum actuator operable by increase in intake vacuum on the downstream side of a throttle valve. The vacuum actuator is releasably connected to the valve-actuating member so as to maintain driving engagement with the actuating member only when the throttle valve is nearly closed. An operating member of the throttle valve, controlled by an accelerator pedal, is pivotably interconnected with the throttle-valve-actuating member via a lost motion connection of limited clearance so that when the throttle valve is in nearly closed condition, the actuating member is operable by the vacuum actuator upon increase in intake vacuum to open the throttle valve while allowing the operating member of the throttle valve to remain in inoperative position. With the operating member remaining in its inoperative position; a further device acts to retard the ignition timing of the engine.
Inventors
- 👤 Tasuku Date
- 👤 Shuichi Yamazaki
- 👤 Nobuyuki Togashi
- 👤 Toshio Shioya
- 👤 Tomoki Kikuraku
- 👤 Norimitsu Kurihara
- 👤 Akira Ishizuya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:50
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/05; F02P5/06; F02D; F02D37/00; F02D37/02; F02M; F02M19/00; F02M19/12; F02M19/122; F02M3/00; F02M3/06; F02M3/07; F02P5/145; F02P5/155; F02P7/00; F02P7/06; F02P7/063; F02P7/0637; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40; Y10; Y10S; Y10S261/00; Y10S261/19
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
A device as claimed in claim 1, comprising first contact breaker means adapted to advance the ignition timing with increase in engine speed when the engine is in the state of normal drive, second contact breaker means arranged for ignition timing retardeD relative to that of said first contact breaker means, and electric switch means arranged between said first and second contact breaker means and operable in association with the accelerator pedal control to render said first and second contact breaker means alternately effective.
Claim 2
Dependent Claim
46 words
A device as claimed in claim 1, in which said throttle-valve-actuating and operating members are not only operably interconnected by lost motion means of limited clearance but are also interconnected by a tension spring that is weaker than a return spring provided for said throttle-valve-operating member.
Claim 3
Dependent Claim
37 words
A device as claimed in claim 1, further comprising a means to resist initial returning movement of said throttle-valve-actuating member when the throttle valve is allowed to return quickly to the vicinity of its fully closed position.
Claim 4
Dependent Claim
112 words
A device as claimed in claim 1, comprising a combined vacuum actuator and dashpot assembly including: a vacuum actuator section including a spring-loaded diaphragm formed with a stop surface and a vacuum inlet formed on one side thereof to receive intake vacuum of the engine; a dashpot section arranged in axially adjacent relation to said vacuum actuator section and including a spring-loaded diaphragm; and a plunger rod slidably arranged on a common axis of said sections and secured to the dashpot diaphragm, said plunger rod being adapted to advance with closing movement of the throttle valve and carrying a stop member for abutting engagement with said stop surface on said actuator diaphragm.
Claim 5
Dependent Claim
40 words
A device for automotive use as claimed in claim 1, further comprising vacuum switching means inserted in the line of intake vacuum leading to said vacuum actuator means and operable at appropriate times to render said vacuum actuator means ineffective.
Claim 6
Dependent Claim
46 words
A device as claimed in claim 6, further comprising means for detecting load on the engine, said detecting means being operably connected with said vacuum switching means in a manner such that said vacuum actuator means remains inoperative as long as the engine is not loaded.
Claim 7
Dependent Claim
78 words
A device as claimed in claim 2 further comprising: means for maintaining the operation of said second contact breaker means for an initial period of movement of the throttle valve from small to wide opening and then rendering said first contact breaker means effective in the place of said second contact breaker means; and means for advancing the ignition timing of said second contact breaker means as the opening of the throttle valve increases in said initial period.
Claim 8
Dependent Claim
97 words
A device as claimed in claim 2, comprising a parallel arrangement of said first and second contact breaker means in the primary side of the ignition coil, said second contact breaker means being adapted to break later than said first contact breaker means while the latter is open, said electric switch means being inserted in the circuit of said second contact breaker means so as to connect only said first contact breaker means to the ignition coil when thrown open and to connect both said first and second contact breaker means to the ignition coil when closed.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |