Interrelated power delivery controls – including engine control – Transmission control – Engine controlled by transmission
Reexamination Certificate
2005-06-28
2005-06-28
Ho, Ha (Department: 3681)
Interrelated power delivery controls, including engine control
Transmission control
Engine controlled by transmission
Reexamination Certificate
active
06910990
ABSTRACT:
An engine control system controls engine torque to transition through the transmission and driveline's lash zone. The transmission and driveline's lash zone is indicated using information of the speed ratio across the torque converter. This information is then supplemented with information of the driver's request and vehicle speed so that engine torque is adjusted at various predetermined rates based on current operating conditions. As such, the system can reduce undesired drive feel that otherwise may occur as the system passes through the transmission and driveline's lash zone. By limiting the change of torque in this way, driveability, while at the same time maintaining acceptable performance response.
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Ciarrocchi Rob
Cullen Michael J.
Doering Jeffrey A.
Alleman Hall McCoy Russell & Tuttle LLP
Ford Global Technologies LLC
Ho Ha
Lippa Allan J.
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