US3714933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic temperature control device for intake air of an internal combustion engine
Assignee: Honda Motor Co Ltd
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Filing: 1971-11-11
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Granted: 1973-02-06
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Expires: 1991-11-11
Abstract
Abstract An automatic temperature control device for intake air of an internal combustion engine comprises a control valve for adjusting the ratio of the amount of cool air and hot air each supplied into the interior of the intake pipe of the engine so as to control the temperature of intake air, and a negative pressure motor for operation of said control valve which negative pressure chamber is, on one hand, in conjunction with the interior of the intake pipe downstream of a throttle valve, and is, on the other hand, opened into the atmosphere through a temperature sensitive valve being operatable according to variation of the temperature of the engine or an adjacent point thereof. The air passage between the negative pressure chamber of the negative pressure motor and the interior of the intake pipe has an one-way valve and two invariable orifices on its way. The one-way valve permit air to pass through the air passage just from the negative pressure chamber of the negative pressure motor to the interior of the intake pipe, and one of the invariable orifices is interposed between the one way valve and the intake pipe, while the other makes the air passage between said one-way valve and said other invariable orifice open into the atmosphere.
Inventors
- 👤 M Ozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:46
CPC Classifications
F; F02; F02M; F02M31/00; F02M31/02; F02M31/04; F02M31/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
180 words
An automatic temperature control device for intake air of an internal combustion engine comprising a control valve for adjusting the ratio of the amount of cool air and hot air each supplied into the interior of the intake pipe of the engine, a negative pressure motor for operation of said control valve which negative pressure chamber is, on one hand, in connection with the interior of the intake pipe downstream of a throttle valve, and is, on the other hand, opened into the atmosphere through a temperature sensitive valve operatable according to variation of the temperature of the engine or an adjacent point thereof, an air passage having an one-way valve at an intermediate portion thereof, which permit air to pass therethrough just from the negative pressure chamber of the negative pressure motor to the interior of the intake pipe downstream of the throttle valve, means for preventing rapid reducing of the pressure in the negative pressure chamber of the negative pressure motor against instantaneous variation of the pressure in the interior of the intake pipe behind the throttle valve.
Claim 2
Dependent Claim
180 words
An automatic temperature control device for intake air of an internal combustion engine comprising a control valve for adjusting the ratio of the amount of cool air and hot air each supplied into the interior of the intake pipe of the engine, a negative pressure motor for operation of said control valve which negative pressure chamber is, on one hand, in connection with the interior of the intake pipe downstream of a throttle valve, and is, on the other hand, opened into the atmosphere through a temperature sensitive valve operatable according to variation of the temperature of the engine or an adjacent point thereof, an air passage having an one-way valve at an intermediate portion thereof, which permit air to pass therethrough just from the negative pressure chamber of the negative pressure motor to the interior of the intake pipe downstream of the throttle valve, means for preventing rapid reducing of the pressure in the negative pressure chamber of the negative pressure motor against instantaneous variation of the pressure in the interior of the intake pipe behind the throttle valve.
Claim 3
Dependent Claim
180 words
An automatic temperature control device for intake air of an internal combustion engine comprising a control valve for adjusting the ratio of the amount of cool air and hot air each supplied into the interior of the intake pipe of the engine, a negative pressure motor for operation of said control valve which negative pressure chamber is, on one hand, in connection with the interior of the intake pipe downstream of a throttle valve, and is, on the other hand, opened into the atmosphere through a temperature sensitive valve operatable according to variation of the temperature of the engine or an adjacent point thereof, an air passage having an one-way valve at an intermediate portion thereof, which permit air to pass therethrough just from the negative pressure chamber of the negative pressure motor to the interior of the intake pipe downstream of the throttle valve, means for preventing rapid reducing of the pressure in the negative pressure chamber of the negative pressure motor against instantaneous variation of the pressure in the interior of the intake pipe behind the throttle valve.
Claim 4
Dependent Claim
180 words
An automatic temperature control device for intake air of an internal combustion engine comprising a control valve for adjusting the ratio of the amount of cool air and hot air each supplied into the interior of the intake pipe of the engine, a negative pressure motor for operation of said control valve which negative pressure chamber is, on one hand, in connection with the interior of the intake pipe downstream of a throttle valve, and is, on the other hand, opened into the atmosphere through a temperature sensitive valve operatable according to variation of the temperature of the engine or an adjacent point thereof, an air passage having an one-way valve at an intermediate portion thereof, which permit air to pass therethrough just from the negative pressure chamber of the negative pressure motor to the interior of the intake pipe downstream of the throttle valve, means for preventing rapid reducing of the pressure in the negative pressure chamber of the negative pressure motor against instantaneous variation of the pressure in the interior of the intake pipe behind the throttle valve.
References Cited (Backward Citations)
US3394687A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |