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US 5,509,867 AGranted
Engine flywheel torque determination method/system
AssigneeEaton Corporation
InventorThomas A. Genise
Life of this patent
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AssigneeEaton Corporation
InventorThomas A. Genise
Estimating the term…
An adaptive control system/method for an at least partially automated vehicular mechanical transmission system (10) is provided for determining the current value of a control parameter (T.sub.FW) indicative of engine flywheel torque. Engine flywheel torque (T.sub.FW) is determined as a function of the expression gross engine torque (T.sub.EG) is equal to the sum of flywheel torque (T.sub.FW), base engine friction torque (T.sub.BEF), acceleration torque (T.sub.ACCEL) and accessory torque (T.sub.ACCES). Accessory torque (T.sub.ACCES) is determined, when the vehicle is in motion, as a function of engine deceleration rate (dES/dt rate). Flywheel torque (T.sub.FW), or drivewheel torque (T.sub.DW) determined as a function of flywheel torque (T.sub.FW) and drivetrain parameters such as engaged gear ratio (GR), is utilized as a control parameter for controlling shifting of the transmission system.
A method for controlling a vehicular automated system including determining a value of a control parameter (T.sub.FW) indicative of engine flywheel torque of a vehicular internal combustion engine (E) in a vehicular automated mechanical tranmission system comprising a fuel throttle-controlled internal combustion engine (E), a multiple-speed change-gear mechanical transmission (10) having an input shaft (16) and an output shaft (90) adapted to drive vehicular drivewheels, said input shaft drivingly connected to said engine by a master friction clutch (C) and a control unit (106) for receiving input signals, including an input signal (ES, IS) indicative of input shaft or engine rotational speed, and for processing said signals in accordance with predetermined logic rules to determine control parameters and to issue command output signals to transmission system actuators, including means for controlling fueling of the engine and means (70) for controlling shifting of the transmission, said method characterized by:
A method for determining a value of a control parameter (T.sub.FW) indicative of the engine flywheel torque of a vehicular internal combustion engine (E) in a vehicular automated mechanical tranmission system comprising a fuel throttle-controlled internal combustion engine (E), a multiple-speed change-gear mechanical transmission (10) having an input shaft (16) and an output shaft (90) adapted to drive vehicular drivewheels, said input shaft drivingly connected to said engine by a master friction clutch (C) and a control unit (106) for receiving input signals, including an input signal (ES, IS) indicative of input shaft or engine rotational speed, an input signal (T.sub.GE) indicative of gross engine torque and an input signal (T.sub.BEF) indicative of base engine friction torque, and for processing said signals in accordance with predetermined logic rules to determine control parameters and to issue command output signals to transmission system actuators, including means for controlling fueling of the engine and means (70) for controlling shifting of the transmission, said method characterized by:
A control system for determining a value of a control parameter (T.sub.FW) indicative of the engine flywheel torque of a vehicular internal combustion engine (E) in a vehicular automated mechanical tranmission system comprising a fuel throttle-controlled internal combustion engine (E), a multiple-speed change-gear mechanical transmission (10) having an input shaft (16) and an output shaft (90) adapted to drive vehicular drivewheels, said input shaft drivingly connected to said engine by a master friction clutch (C) and a control unit (106) for receiving input signals, including an input signal (ES, IS) indicative of input shaft or engine rotational speed, and for processing said signals in accordance with predetermined logic rules to determine control parameters and to issue command output signals to transmission system actuators, including means for controlling fueling of the engine and means (70) for controlling shifting of the transmission, said system characterized by:
A control system for determining a value of a control parameter (T.sub.FW) indicative of the engine flywheel torque of a vehicular internal combustion engine (E) in a vehicular automated mechanical tranmission system comprising a fuel throttle-controlled internal combustion engine (E), a multiple-speed change-gear mechanical transmission (10) having an input shaft (16) and an output shaft (90) adapted to drive vehicular drivewheels, said input shaft drivingly connected to said engine by a master friction clutch (C) and a control unit (106) for receiving input signals, including an input signal (ES, IS) indicative of input shaft or engine rotational speed, an input signal (T.sub.GE) indicative of gross engine torque and an input signal (T.sub.BEF) indicative of base engine friction torque, and for processing said signals in accordance with predetermined logic rules to determine control parameters and to issue command output signals to transmission system actuators, including means for controlling fueling of the engine and means (70) for controlling shifting of the transmission, said control system characterized by:
Dependencies are inferred from the claim text.