EP0171770A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A method of controlling a transmission of a vehicle
Assignee: Toyota Motor Corp
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Filing: 1985-08-09
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Granted: —
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Expires: 2005-08-09
Abstract
Abstract A method of controlling a trasmission of a vehicle selectively either in a first mode of operation in such a manner that the transmission is shifted among a plurality of speed stages according to a first shift pattern, or in a second mode of operation in such a manner that the transmission is shifted among those speed stages which lacks at least one intermediate speed stage in the above-mentioned plurality of speed stages according to a second shift pattern, according selection between the above two modes of operation. On-off controlling of a lockup clutch is also changed in two modes according to the selection between the two modes of speed stage shifting, when it is incorporated in the transmission.
Inventors
- 👤 Seitoku Toyota Jidosha Kabushiki Kaisha Kubo
- 👤 Yutaka Toyota Jidosha Kabushiki Kaisha Taga
- 👤 Shinya Toyota Jidosha Kabushiki Kaisha Nakamura
- 👤 Hideki Toyota Jidosha Kabushiki Kaisha Yasue
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 06:54
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/02; F16H61/0202; F16H61/0204; F16H61/0213; F16H63/00; F16H63/40; F16H63/44; B; B60; B60W; B60W2555/00; B60W2555/40; F16H59/00; F16H59/02; F16H59/08; F16H2059/082; F16H2059/084; F16H2059/085; F16H2200/00; F16H2200/003; F16H2200/0047; F16H2200/20; F16H2200/2002; F16H2200/2007; F16H59/50; F16H59/60; F16H59/62; F16H59/68; F16H59/72; F16H59/74; F16H59/78; F16H61/14; F16H61/68; F16H61/684; F16H61/686
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
84 words
A method of controlling a transmission of a vehicle, said transmission comprising a gear mechanism for providing a first plurality of speed stages, characterized in that said gear mechanism is shifted among said first plurality of speed stages according a first shift pattern and among a second plurality of shift speed stages which lack at least one intermediate speed stage in said first plurality of speed stages according to a second shift pattern according to selection between first and second modes of operation, respectively.
Claim 2
Independent Claim
84 words
A method of controlling a transmission of a vehicle, said transmission comprising a gear mechanism for providing a first plurality of speed stages, characterized in that said gear mechanism is shifted among said first plurality of speed stages according a first shift pattern and among a second plurality of shift speed stages which lack at least one intermediate speed stage in said first plurality of speed stages according to a second shift pattern according to selection between first and second modes of operation, respectively.
Claim 3
Dependent Claim
16 words
A method according to claim 1, wherein said intermediate speed stage is a 2nd speed stage.
Claim 4
Dependent Claim
21 words
A method according to claim 1, wherein said intermediate speed stages are a 2nd speed stage and a 4th speed stage.
Claim 5
Dependent Claim
68 words
A method according to claim 1, wherein said first shift pattern is a shift pattern for controlling said transmission with more preference being placed on power quality of the vehicle than on economical quality of the vehicle, and said second shift pattern is a shift pattern for controlling said transmission with more preference being placed on economical quality of the vehicle than on power quality of the vehicle.
Claim 6
Dependent Claim
63 words
A method according to claim 1, wherein, when said first and second shift patterns are expressed in a diagram by a coordinate of an abscissa for vehicle road speed and an ordinate for throttle opening, speed shift lines in said second shift pattern are totally generally biased toward smaller vehicle speed side than the corresponding speed shift lines in said first shift pattern.
Claim 7
Dependent Claim
133 words
A method according to claim 1, wherein said second shift pattern is substantially the same as said first shift pattern except that a speed shift line between a speed stage adjacent said intermediate speed stage on lower speed side thereof and said intermediate speed stage in said first shift pattern is converted into a speed shift line in said second shift pattern between said speed stage adjacent said intermediate speed stage on lower speed side thereof and a speed stage adjacent said intermediate speed stage on higher speed side thereof in said first shift pattern, and that a ' speed shift line between said intermediate speed stage and said speed stage adjacent said intermediate speed stage on higher speed side thereof in said first shift pattern is omitted in said second shift pattern.
Claim 8
Dependent Claim
30 words
A method according to claim 1, wherein said transmission is shifted according to said second shift pattern when and only when throttle opening is smaller than a predetermined medium opening.
Claim 9
Dependent Claim
58 words
A method according to claim 1, wherein said transmission further comprises a lockup clutch, said lockup clutch being engaged and disengaged according a first on-off pattern when said gear mechanism is shifted according to said first shift pattern and according to a second on-off pattern when said gear mechanism is shifted according to said second shift pattern, respectively.
Claim 10
Dependent Claim
70 words
A method according to claim 8, wherein said first on-off pattern is an on-off pattern for controlling said lockup clutch with more preference being placed on power quality of the vehicle than on economical quality of the vehicle, and said second on-off pattern is an on-off pattern for controlling said lockup clutch with more preference being placed on economical quality of the vehicle than on power quality of the vehicle.
Claim 11
Dependent Claim
71 words
A method according to claim 9, wherein, when said first and second on-off patterns are expressed in a diagram by a coordinate of an abscissa for vehicle road speed and an ordinate for throttle opening, on-off switching lines between engagement and disengagement of said lockup clutch in said second on-off pattern are totally generally biased toward smaller vehicle speed side than the corresponding on-off switching lines in said first on-off pattern.
Claim 12
Dependent Claim
188 words
A method according to claim 1, wherein said gear mechanism comprises a first gear mechanism which provides two speed stages and a second gear mechanism which provides three speed stages, said first and second gear mechanisms being connected in series to one another, said gear mechanism providing a 1st speed stage when said first gear mechanism is in a lower speed stage thereof and said second gear mechanism is in a low speed stage thereof, a 2nd speed stage when said first gear mechanism is in a higher speed stage thereof and said 2nd gear mechanism is in said low speed stage thereof, a 3rd speed stage when said first gear mechanism is in said lower speed stage thereof and said second gear mechanism is in an intermediate speed stage thereof, a 4th speed stage when said first gear mechanism is in said lower speed stage thereof and said second gear mechanism is in a high speed stage thereof, and a 5th speed stage when said first gear mechanism is in said higher speed stage thereof and said second gear mechanism is in said high speed stage thereof.
Claim 13
Dependent Claim
19 words
A method according to claim 11, wherein said intermediate speed stage of said transmission is said 2nd speed stage.
Claim 14
Dependent Claim
216 words
A method according to claim 1, wherein said gear mechanism comprises a first gear mechanism which provides two speed stages and a second gear mechanism which provides three speed stages, said first and second gear mechanisms being connected in series to one another, said gear mechanism providing a 1st speed stage when said first gear mechanism is in a lower speed stage thereof and said second gear mechanism is in a low speed stage thereof, a 2nd speed stage when said first gear mechanism is in a higher speed stage thereof and said second gear mechanism is in said low speed stage thereof, a 3rd speed stage when said first gear mechanism is in said lower speed stage thereof and said second gear mechanism is in an intermediate speed stage thereof, a 4th speed stage when said first gear mechanism is in said higher speed stage thereof and said second gear mechanism is in said intermediate speed stage thereof, a 5th speed stage when said first gear mechanism is in said lower speed stage thereof and said second gear mechanism is in a high speed stage thereof, and a 6th speed stage when said first gear mechanism is in said higher speed stage thereof and said second gear mechanism is in said high speed stage thereof.
Claim 15
Dependent Claim
24 words
A method according to claim 13, wherein said intermediate speed stages of said transmission are said 2nd speed stage and said 4th speed stage.
Claim 16
Dependent Claim
141 words
A method according to claim 1, wherein the selection of said second shift pattern is automatically changed to the selection of said first shift pattern when any one of such conditions is met that load carried by the vehicle is equal to or larger than a predetermined weight value, a two wheel/four wheel drive mode switching over system is switched over to a four wheel drive mode, rate of increase of throttle opening on time base is equal to or larger than a predetermined value, altitude at which the vehicle is operated is equal to or larger than a predetermined height value, engine of the vehicle is operated in partial cylinder operation mode, engine temperature is equal to or lower than a predetermined warmed up temperature value, and battery charge condition is equal to or worse than a predetermined good condition.
Claim 17
Dependent Claim
24 words
A method according to claim 1,wherein the selection between said first and second modes is made by manual operation of a shift pattern switch.
Claim 18
Dependent Claim
34 words
A method according to claim 1,wherein said intermediate speed stage is a speed stage at which engine brake is effected when either "S" range or "L" range is manually selected as a shift schedule.
References Cited (Backward Citations)
No citation records indexed.
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