US4745826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 05:09
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.
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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) | 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 |