Shift control system for manually shiftable automatic transmission

A shift control system for an automatic transmission, which has a shift unit for selecting by manipulating a shift lever an automatic shift mode, in which a gear stage is determined on the basis of a running stage of a vehicle, and a manual shift mode in which a gear state is determined from an output signal based on the manipulation, wherein said shift unit has a plurality of range positions including a drive range capable of setting a plurality of forward gear stages and includes:

• a first shift path for guiding said shift lever into said range positions;
• and a second shift path intersecting said first shift path for guiding said shift lever into a gear stage for instructing a forward gear stage in the manual shift mode;
• and manual shift instruct means for outputting a signal instructing a gear stage corresponding to said gear stage position when said shift lever is moved to said gear stage position, comprising,
• gear stage set means for setting the gear stage which is instructed by the output signal of said manual shift instruct means,
• wherein said automatic transmission includes engine braking frictional engage means for effecting an engine braking at a predetermined gear stage, and
• wherein said manual shift instruct means includes means for releasing said engine braking frictional engage means when said shift lever comes out of the gear stage position for instructing said predetermined gear stage so that the output of the signal instructing said gear stage is interrupted.

A shift control system for an automatic transmission, which has a shift unit for selecting by manipulating a shift lever an automatic shift mode, in which a gear stage is determined on the basis of a running stage of a vehicle, and a manual shift mode in which a gear state is determined from an output signal based on the manipulation, wherein said shift unit has a plurality of range positions including a drive range capable of setting a plurality of forward gear stages and includes:

• a first shift path for guiding said shift lever into said range positions;
• and a second shift path intersecting said first shift path for guiding said shift lever into a gear stage for instructing a forward gear stage in the manual shift mode;
• and manual shift instruct means for outputting a signal instructing a gear stage corresponding to said gear stage position when said shift lever is moved to said gear stage position, comprising,
• gear stage set means for setting the gear stage which is instructed by the output signal of said manual shift instruct means,
• mode decide means for deciding the shift mode which is selected by said shift unit;
• and
• means for inhibiting the state,
• in which any range in said automatic shift mode is selected, when it is decided that said manual shift mode is set.

A shift control system for an automatic transmission, which has a shift unit for selecting by manipulating a shift lever an automatic shift mode, in which a gear stage is determined on the basis of a running stage of a vehicle, and a manual shift mode in which a gear state is determined from an output signal based on the manipulation, wherein said shift unit has a plurality of range positions including a drive range capable of setting a plurality of forward gear stages and includes:

• a first shift path for guiding said shift lever into said range positions;
• and a second shift path intersecting said first shift path for guiding said shift lever into a gear stage for instructing a forward gear stage in the manual shift mode;
• and manual shift instruct means for outputting a signal instructing a gear stage corresponding to said gear stage position when said shift lever is moved to said gear stage position, comprising,
• gear stage set means for setting the gear stage which is instructed by the output signal of said manual shift instruct means,
• vehicle speed detect means for detecting a vehicle speed;
• maximum speed set means for setting the maximum speed which is allowed for each of said gear stages;
• and
• gear stage inhibit means for inhibiting the selection of the gear stage, at which the allowable maximum speed is no more than the detected vehicle speed, in said manual shift mode by comparing the vehicle speed detected by said vehicle speed detect means and said allowable maximum speed.

A shift control system for an automatic transmission, which has a shift unit for selecting by manipulating a shift lever an automatic shift mode, in which a gear stage is determined on the basis of a running stage of a vehicle, and a manual shift mode in which a gear state is determined from an output signal based on the manipulation, wherein said shift unit has a plurality of range positions including a drive range capable of setting a plurality of forward gear stages and includes:

• a first shift path for guiding said shift lever into said range positions;
• and a second shift path intersecting said first shift path for guiding said shift lever into a gear stage for instructing a forward gear stage in the manual shift mode;
• and manual shift instruct means for outputting a signal instructing a gear stage corresponding to said gear stage position when said shift lever is moved to said gear stage position, comprising,
• gear stage set means for setting the gear stage which is instructed by the output signal of said manual shift instruct means,
• wherein said shift unit further includes an inhibit mechanism for inhibiting the motion of said shift lever from a predetermined range position to another range position and for releasing the inhibiting state by a manual operation.

A shift control system for an automatic transmission, which has a shift unit for selecting by manipulating a shift lever an automatic shift mode, in which a gear stage is determined on the basis of a running stage of a vehicle, and a manual shift mode in which a gear state is determined from an output signal based on the manipulation, wherein said shift unit has a plurality of range positions including a drive range capable of setting a plurality of forward gear stages and includes:

• a first shift path for guiding said shift lever into said range positions;
• and a second shift path intersecting said first shift path for guiding said shift lever into a gear stage for instructing a forward gear stage in the manual shift mode;
• and manual shift instruct means for outputting a signal instructing a gear stage corresponding to said gear stage position when said shift lever is moved to said gear stage position, comprising,
• mode decide means for deciding a shift mode to be selected, and
• means for inhibiting any range except the drive range in the automatic shift mode by blocking the motion of said shift lever to the position, in which a predetermined range is to be set in said automatic shift mode, when said mode decide means decides that said manual shift mode is selected.

A shift control system for an automatic transmission, comprising shift mode select means for selecting an automatic shift mode, in which a gear stage is determined on the basis of a running state of a vehicle, and a manual shift mode in which a gear state is determined from an output signal based on the manipulation, comprising:

• vehicle speed detect means for detecting a vehicle speed;
• maximum speed set means for setting the maximum speed which is allowed for each of said gear stages;
• and
• gear stage inhibit means for inhibiting the select of the gear stage, at which the allowable maximum speed is no more than the detected vehicle speed, in said manual shift mode by comparing the vehicle speed detected by said vehicle speed detect means and said allowable maximum speed.