Shift control apparatus in vehicle automatic transmission
AssigneeAisin Seiki Kabushiki Kaisha
InventorsFuyumi Kimura, Yutaka Ito, Nobuyuki Okada, Hiroyuki Nishizawa
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Abstract
In a shift control apparatus in a vehicle automatic transmission, up-shift is carried out from a low velocity step to a high velocity step. When a rotational blow is generated, a controlling device controls the releasing side element of frictional engaging elements in such a target that the releasing side element of frictional engaging elements slips on the mating member with the engaging side element of frictional engaging elements moving for engagement.
Claims8
A shift control apparatus in a vehicle automatic transmission, wherein an engaging side element of frictional engaging elements is engaged to become a high velocity step, while a releasing side element of frictional engaging elements engaged in a low velocity step is released from a mating member, during up-shift, and said apparatus comprising:
- controlling means for controlling said releasing side element of frictional engaging elements in such a target that said releasing side element of frictional engaging elements continues to slip on said mating member with said engaging side element of frictional engaging elements moving for engagement when a rotational blow is generated;
- said engaging side element of frictional engaging elements having a condition to be engaged;
- until said engaging side element of frictional engaging elements reaches said condition to be engaged,
- said releasing side element of frictional engaging elements continues to slip so as to be kept in a semi-engaged and semi-released condition with respect to said mating member of said releasing side element.
A shift control apparatus for up-shifting a vehicle automatic transmission comprising:
- an engaging side element of frictional engaging elements to be engaged with a high velocity step;
- a releasing side element of frictional engaging elements to be engaged with a low velocity step;
- first controlling means for controlling said releasing side element to prevent rotational blow from being generated;
- and
- second controlling means for engaging said engaging side element.
Dependencies are inferred from the claim text.