Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine
Patent
1996-04-03
1998-01-06
Ta, Khoi Q.
Interrelated power delivery controls, including engine control
Transmission control
Transmission controlled by engine
477143, 477155, F16H 6106
Patent
active
057048746
ABSTRACT:
A shift control method for executing a shift-up control from an off-going range to an on-coming range comprises an off-going-range releasing stage, an off-going-range controlling stage, and an on-coming-range invalid-stroke-clearing stage. In the off-going-range releasing stage, a pressure command signal is generated to quickly lower the engagement-actuation pressure of the off-going engaging element. In the off-going-range controlling stage, a pressure command signal is generated to control the engagement-actuation pressure of the off-going engaging element in such a way that the off-going engaging element is kept slipping within a predetermined range of input/output rotational speed ratio (=output rotational speed/input rotational speed). In the on-coming-range invalid-stroke-clearing stage, a pressure command signal is generated to set the engagement-actuation pressure of the on-coming engaging element to a predetermined high-pressure which is necessary for the on-coming engaging element to clear its invalid stroke. This shift-up control initiates the on-coming-range invalid-stroke-clearing stage in response to a shift-up command and proceeds from the off-going-range releasing stage to the off-going-range controlling stage when the input/output speed ratio of the off-going engaging element reaches a first predetermined value in the off-going-range releasing stage. Then, pressure command signals are generated sequentially first to engage the on-coming engaging element in a predetermined engaging pattern and then to completely release the off-going engaging element.
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Sekine Noboru
Shimada Takamichi
Honda Giken Kogyo Kabushiki Kaisha
Kwon Peter T.
Ta Khoi Q.
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