Patent US4745826A successfully refreshed from Google Patents.
US4745826A
Expired / Lapsed
US
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Shift condition detector for an automatic vehicle transmission
Assignee: Aisin AW Co Ltd
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Filing: 1986-01-17
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Granted: 1988-05-24
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Expires: 2006-01-17
Abstract
Abstract A main transmission has a transfer gear attached to its output shaft. The transfer gear provides two wheel high speed drive, four wheel high speed drive, and four wheel low speed drive. A control system controls the main transmission according to a detected speed mode of the transfer gear. The control system uses an electrical detector for sensing the speed mode of the transfer gear.
Inventors
- 👤 Seiichi Nishikawa
- 👤 Yoshiharu Harada
- 👤 Kagenori Fukumura
- 👤 Yoichi Hayakawa
- 👤 Masao Kawai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:28
CPC Classifications
F; F16; F16H; F16H63/00; F16H63/40; F16H63/44; B; B60; B60K; B60K23/00; B60K23/08; F16H61/00; F16H61/70; F16H61/702; F16H2300/00; F16H2300/18; F16H2306/00; F16H2306/20; F16H2306/40; F16H2306/44; F16H2306/52; F16H59/00; F16H59/50; F16H59/68; F16H59/70; F16H61/68; F16H61/684; F16H61/686; Y; Y10; Y10S; Y10S477/00; Y10S477/908
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
A control system for a vehicle transmission, comprising a main transmission; a transfer gear having at least two speed modes being operative in respective shifting conditions of said transfer gear; means forming part of said transfer gear for changing from a two-wheel drive mode to a four-wheel drive mode and conversely; a manual shifting valve operatively connected with said transfer gear for changing said speed modes and drive modes; an electric detecting means for detecting the shifting condition of said transfer gear for a respective said speed mold; and an electric control means for controlling said main transmission according to said detected speed mode of said transfer gear.
Claim 2
Dependent Claim
108 words
A control system for a vehicle transmission, comprising a main transmission; a transfer gear having at least two speed modes being operative in respective shifting conditions of said transfer gear; means forming part of said transfer gear for changing from a two-wheel drive mode to a four-wheel drive mode and conversely; a manual shifting valve operatively connected with said transfer gear for changing said speed modes and drive modes; an electric detecting means for detecting the shifting condition of said transfer gear for a respective said speed mold; and an electric control means for controlling said main transmission according to said detected speed mode of said transfer gear.
Claim 3
Dependent Claim
20 words
A control system as defined in claim 1, wherein said electric detecting means is interlocked with said manual shifting valve.
Claim 4
Dependent Claim
40 words
A control system as defined in claim 1, wherein said manual shifting valve has at least two outlet ports, and said transfer gear has a high-speed four-wheel drive mode, a low-speed four-wheel drive mode and a high-speed two-wheel drive mode.
Claim 5
Dependent Claim
20 words
A control system as defined in claim 3, wherein said electric detecting means is interlocked with said manual shifting valve.
Claim 6
Dependent Claim
93 words
A control system for a vehicle transmission, comprising a main transmission; a transfer gear having a high-speed four-wheel drive mode, a low-speed four-wheel drive mode and a high-speed two-wheel drive mode being operative in respective shifting conditions of said transfer gear; a manual shifting valve operatively connected with said transfer gear and having at least two outlet ports; means forming part of said transfer gear for changing from a two-wheel drive mode to a four-wheel drive mode and conversely; and an electric detecting means for detecting the shifting condition of said transfer gear.
Claim 7
Dependent Claim
93 words
A control system for a vehicle transmission, comprising a main transmission; a transfer gear having a high-speed four-wheel drive mode, a low-speed four-wheel drive mode and a high-speed two-wheel drive mode being operative in respective shifting conditions of said transfer gear; a manual shifting valve operatively connected with said transfer gear and having at least two outlet ports; means forming part of said transfer gear for changing from a two-wheel drive mode to a four-wheel drive mode and conversely; and an electric detecting means for detecting the shifting condition of said transfer gear.
Claim 8
Dependent Claim
20 words
A control system as defined in claim 5, wherein said electric detecting means is interlocked with said manual shifting valve.
References Cited (Backward Citations)
US4411174A
Cited
US4552036A
Cited
US4369671A
Cited
US4484654A
Cited
US4417641A
Cited
US4388843A
Cited
US4466502A
Cited
US4503927A
Cited
US4582159A
Cited
US4586583A
Cited
US4561325A
Cited
US4663992A
Cited
US4602696A
Cited
US4592442A
Cited
US4664217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-24 | 1991-11-23 | 1992-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-24 | 1995-11-23 | 1996-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-24 | 1999-11-23 | 2000-05-24 | $7700.00 | Window Closed / Lapsed |