Patent US4088102A successfully refreshed from Google Patents.
US4088102A
Expired / Lapsed
US
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Auxiliary acceleration fuel feed device in an internal combustion engine
Assignee: Toyota Motor Corp
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Filing: 1976-10-28
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Granted: 1978-05-09
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Expires: 1996-10-28
Abstract
Abstract An auxiliary acceleration fuel feed device in an internal combustion engine used for a vehicle is disclosed. An auxiliary accelerator pump is provided for feeding an auxiliary acceleration fuel into the fuel supply passage of the engine in response to a decrease in the vacuum in the intake manifold. A vacuum control device in a vacuum conduit connecting the pump and the intake manifold is responsive to the engine temperature and the vehicle speed. The vacuum control device is arranged so as to close the vacuum conduit to prevent the supply of the fuel to the nozzle by the pump when the engine temperature and the vehicle speed is above respective predetermined levels.
Inventors
- 👤 Takashi Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:17
CPC Classifications
F; F02; F02M; F02M7/00; F02M7/06; F02M7/08; F02M71/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
An auxiliary acceleration fuel feed device in an internal combustion engine used for a vehicle, said engine having in a fuel supply passage, a carburetor having an acceleration pump for feeding an acceleration fuel into the fuel supply passage at the time of acceleration, comprising; an auxiliary accelerator nozzle disposed in the intake passage, an auxiliary accelerator pump in a fuel conduit connecting a supply of fuel with the auxiliary accelerator nozzle, the pump being operatively connected to the intake passage downstream of a throttle valve of the carburetor through a vacuum conduit so as to feed an auxiliary acceleration fuel to said nozzle in response to a decrease in the vacuum in the vacuum conduit, and, a vacuum control device in the vacuum conduit responsive to the engine temperature and the vehicle speed and arranged so as to close the vacuum conduit to prevent the supply of the fuel to the nozzle by the pump when the engine temperature is above a predetermined level and the vehicle speed is above a predetermined level.
Claim 2
Dependent Claim
174 words
An auxiliary acceleration fuel feed device in an internal combustion engine used for a vehicle, said engine having in a fuel supply passage, a carburetor having an acceleration pump for feeding an acceleration fuel into the fuel supply passage at the time of acceleration, comprising; an auxiliary accelerator nozzle disposed in the intake passage, an auxiliary accelerator pump in a fuel conduit connecting a supply of fuel with the auxiliary accelerator nozzle, the pump being operatively connected to the intake passage downstream of a throttle valve of the carburetor through a vacuum conduit so as to feed an auxiliary acceleration fuel to said nozzle in response to a decrease in the vacuum in the vacuum conduit, and, a vacuum control device in the vacuum conduit responsive to the engine temperature and the vehicle speed and arranged so as to close the vacuum conduit to prevent the supply of the fuel to the nozzle by the pump when the engine temperature is above a predetermined level and the vehicle speed is above a predetermined level.
Claim 3
Dependent Claim
136 words
An auxiliary acceleration fuel feed device as recited in claim 1, wherein said auxiliary accelerator pump comprises a housing having a diaphragm therein, a vacuum chamber and a pumping chamber in the housing, which are separated by the diaphragm, said vacuum chamber being connected to the intake manifold downstream of the throttle valve via the vacuum conduit, a compression spring in the vacuum chamber arranged so as to bias the diaphragm, a first check valve disposed in the fuel conduit connecting the pumping chamber and the supply of fuel and allowing only inflow of the fuel to the pumping chamber from the supply of fuel, and a second check valve disposed in the fuel conduit connecting the pumping chamber and the nozzle and allowing only outflow of the fuel from the pumping chamber to the nozzle.
Claim 4
Dependent Claim
73 words
An auxiliary acceleration fuel feed device as recited in claim 1, wherein said vacuum control devices comprises a vehicle speed sensor, a temperature reactive switch and an electromagnetic valve in the vacuum conduit responsive to an electrical output from the vehicle speed sensor and the temperature reactive switch, the electromagnetic valve being arranged to close when the vehicle speed is above a predetermined level and the engine temperature is above a predetermined level.
Claim 5
Dependent Claim
92 words
An auxiliary acceleration fuel feed device as recited in claim 1, wherein said vacuum control device comprises a vehicle speed sensor, and an electromagnetic valve and an engine temperature reactive valve disposed in parallel in the vacuum conduit responsive to an electrical output from the vehicle speed sensor and responsive to change in temperature of the engine, respectively, the electromagnetic valve being arranged to close when the vehicle speed is above a predetermined level, the engine temperature reactive valve being arranged to close when the engine temperature is above a predetermined level.
Claim 6
Dependent Claim
24 words
An auxiliary acceleration fuel feed device as recited in claim 4, wherein said engine temperature reactive valve comprises a bimetal type temperature sensing valve.
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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) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |