Shift control device of automatic transmission
AssigneesToyota Jidosha Kabushiki Kaisha, Aisin Aw Co., Ltd.
InventorsMasami Kondo, Tooru Matsubara, Yoshikazu Tanaka, Yasushi Sato, Satoshi Yoshida, Akira Fukatsu, Kiyoshi Watanabe
Life of this patent
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Abstract
A shift control device of an automatic transmission comprising detection means for detecting a shift from a non-drive to a drive position; output means for outputting a command to execute an engine output lowering; detection means for detecting a transmission input revolution number and control means for engaging the friction engagement element by direct pressure control in response to a detection of said transmission input revolution number having been decreased to a predetermined value.
Claims20
A shift control device of an automatic transmission transmitting power from an engine, said automatic transmission including a friction engagement element that is engaged in a drive position and disengaged in a non-drive position, an engagement pressure of said friction engagement element being controllable by direct pressure, comprising:
- detection means for detecting a shift from said non-drive position to said drive position;
- output means for outputting a command to execute an output lowering process of said engine to an engine control device in response to detection of the shift to said drive position;
- detection means for detecting an input revolution number to said automatic transmission;
- and
- control means for starting engagement of said friction engagement element by direct pressure control in response to detection of said input revolution number having been decreased to a predetermined revolution number by said output lowering process.
A shift control device of an automatic transmission transmitting power from an engine, said automatic transmission including a friction engagement element that is engaged in a drive position and disengaged in a non-drive position, an engagement pressure of said friction engagement element being controllable by direct pressure, comprising:
- detection means for detecting a shift from said non-drive position to said drive position;
- output means for outputting a command to execute an output lowering process of said engine to an engine control device in response to detection of the shift to said drive position;
- and
- control means for starting engagement of said friction engagement element (310) by direct pressure control after a lapse of a predetermined period of time following initiation of said output lowering process.
A shift control device of an automatic transmission transmitting power from an engine, said automatic transmission including a friction engagement element that is engaged in a drive position and disengaged in a non-drive position, an engagement pressure of said friction engagement element being controllable by direct pressure, comprising:
- a detection unit detecting a shift from said non-drive position to said drive position;
- an output unit outputting a command to execute an output lowering process of said engine to an engine control device in response to detection of the shift to said drive position;
- a detection unit detecting an input revolution number to said automatic transmission;
- and
- a control circuit starting engagement of said friction engagement element by direct pressure control in response to detection of said input revolution number having been decreased to a predetermined revolution number by said output lowering process.
A shift control device of an automatic transmission transmitting power from an engine, said automatic transmission including a friction engagement element that is engaged in a drive position and disengaged in a non-drive position, an engagement pressure of said friction engagement element being controllable by direct pressure, comprising:
- a detection unit detecting a shift from said non-drive position to said drive position;
- an output unit outputting a command to execute an output lowering process of said engine to an engine control device in response to detection of the shift to said drive position;
- and
- a control circuit starting engagement of said friction engagement element by direct pressure control after a lapse of a predetermined period of time following initiation of said output lowering process.
Dependencies are inferred from the claim text.