Alleman Hall McCoy Russell & Tuttle LLP
Methods and systems for assisted direct start control
Methods and systems are provided for pressurizing a transmission hydraulic circuit including a transmission mechanical pump coupled to an engine though a gearbox. One example method comprises, during an engine start, adjusting a speed ratio between the transmission pump and the engine between a first speed ratio and a second speed ratio, the pump rotating faster relative to the engine at the first speed ratio as compared with the second speed ratio. In this way, the pump may be driven at different speed ratios relative to the engine to provide better pressurization in the transmission.
Ford Global Technologies, LLC
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B60W B60W F04B B60W F16H F02N F16H B60W
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Seung-Hoon Gregory Michael Joseph Norman Yuji Alex O'Connor
Lee Pietron Ulrey Fujii Gibson