Shift control device and ratio control method for automatic transmission
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsNaoto Moriya, Masaharu Tanaka, Yoshio Hasegawa, Tomohiro Asami
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Abstract
In a shift control device and a shift control method for an automatic transmission, when the shift range is switched from a non-travel range to a travel range, a squat control of temporarily forming a high-speed step that is smaller in speed change ratio than the first speed change step by engaging a first engagement element and a second engagement element, and then forming the first speed change step by releasing the second engagement element. In the case of standing-start of the vehicle in the high-speed step, the squat control is ended before the first speed change step is formed by releasing the second engagement element.
Claims4
A shift control device for an automatic transmission, comprising:
- a squat control device that, when a shift range is switched from a non-travel range to a travel range, performs a squat control of temporarily forming a high-speed step that is smaller in speed change ratio than a first speed change step by engaging a first engagement element and a second engagement element, and then forming the first speed change step by releasing the second engagement element;
- and
- a squat control end device that, in a case of standing-start of a vehicle in the high-speed step, ends the squat control performed by the squat control device, before the first speed change step is formed by releasing the second engagement element.
Dependencies are inferred from the claim text.