US3673994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crankcase blow-by gas recirculating device
Assignee: Nissan Motor Co Ltd
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Filing: 1970-06-30
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Granted: 1972-07-04
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Expires: 1990-06-30
Abstract
Abstract A crankcase blow-by gas recirculating device which is adapted to interrupt the recirculation of the blow-by gases from the engine crankcase to the combustion chambers during deceleration and idling when the quantity of unburned hydrocarbons in the engine exhaust gases significantly increases, which device is provided with flow regulating means comprising a valve element operatively interposed in the blow-by gas recirculating passage and means detecting the decelerating and idling conditions and actuating the valve element when the decelerating or idling condition is detected. Such decelerating and idling conditions may preferably represented by the angular position of the throttle valve, vacuum in the intake manifold, vehicle speed, or any combination of these. The device of the invention may be used in combination with an internal combustion engine having a carburettor or having, in lieu of the carburettor a fuel injection system.
Inventors
- 👤 Shigeo Aono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:48
CPC Classifications
F; F01; F01M; F01M13/00; F01M13/02; F01M13/021; F01M13/022; F01M13/023; F02; F02M; F02M25/00; F02M25/06; F16; F16N; F16N2280/00; F16N2280/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
178 words
In an internal combustion engine for use with an automotive vehicle, including in combination a throttle valve, an intake manifold, a plurality of combustion chambers, a crankcase, and a blow-by gas recirculating passage for providing communication between the interior of the crankcase and each of the combustion chambers through the intake manifold to introduce the blow-by gas gases to each of the combustion chambers to thereby prevent the blow-by gases from being emitted to the surrounding atmosphere, the improvement comprising: on-off control solenoid valve means for on-off controlling the flow of the blow-by gases to be introduced to the combustion chambers, said solenoid valve means including a valve element interposed in the recirculating passage and normally held in an open position to allow said communication, said valve element having a spool shape for abruptly shutting off said communication when moved into its closed position concurrently upon the actuation of said valve means; and detecting means detecting the running conditions of the vehicle for actuating said solenoid valve means only when the engine is driven by the vehicle itself.
Claim 2
Dependent Claim
178 words
In an internal combustion engine for use with an automotive vehicle, including in combination a throttle valve, an intake manifold, a plurality of combustion chambers, a crankcase, and a blow-by gas recirculating passage for providing communication between the interior of the crankcase and each of the combustion chambers through the intake manifold to introduce the blow-by gas gases to each of the combustion chambers to thereby prevent the blow-by gases from being emitted to the surrounding atmosphere, the improvement comprising: on-off control solenoid valve means for on-off controlling the flow of the blow-by gases to be introduced to the combustion chambers, said solenoid valve means including a valve element interposed in the recirculating passage and normally held in an open position to allow said communication, said valve element having a spool shape for abruptly shutting off said communication when moved into its closed position concurrently upon the actuation of said valve means; and detecting means detecting the running conditions of the vehicle for actuating said solenoid valve means only when the engine is driven by the vehicle itself.
Claim 3
Dependent Claim
67 words
An improved internal combustion engine according to claim 1, wherein said detecting means includes sensing means for sensing the angular position of said throttle valve for generating a voltage signal when said throttle valve is substantially closed, and wherein said solenoid valve means further includes a solenoid device connected to said valve element for moving the same into said closed position when energized by said voltage signal.
Claim 4
Dependent Claim
85 words
An improved internal combustion engine according to claim 2, wherein said solenoid device includes a solenoid coil electrically connected with said sensing means, a moving core rigidly connected to said valve element, and a coil spring biasing the assembly of said moving core anD valve element for normally holding said valve element in said open position, the spring action of said coil spring being preset to yield to the extracting force of said solenoid coil which is exerted to said assembly by said solenoid coil.
Claim 5
Dependent Claim
80 words
An improved internal combustion engine according to claim 1, wherein said detecting means includes sensing means for sensing the angular position of said throttle valve and the vehicle speed for generating a voltage signal when said throttle valve is substantially closed and when said engine speed exceeds a predetermined level, and wherein said solenoid valve means further includes a solenoid device connected to said valve element for moving the same into said closed position when energized by said voltage signal.
Claim 6
Dependent Claim
85 words
An improved internal combustion engine according to claim 4, wherein said solenoid device includes a solenoid coil electrically connected with said sensing means, a moving core rigidly connected to said valve element, and a coil spring biasing the assembly of said moving core and valve element for normally holding said valve element in said open position, the spring action of said coil spring being preset to yield to the extracting force of said solenoid coil which is exerted to said assembly by said solenoid coil.
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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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |