Eaton Corporation

John E Stainton

Michael W Dunkley

Richard A Nellums

Anthony Stasik

Thomas A Genise

Ronald K Markyvech

Keith Wright

Ian Richard Bates

John Dresden, Iii

Simon Hornby

Kwok W Chan

Robert Stanley Wheeler

Paul Martin Fowler

Philip A Morris

John Slater Tuson

John E Dunne

Barry D Thomas

A system and method for decreasing the time required to complete a ratio change in an electronically enhanced powertrain system is provided. The powertrain system includes a number of devices for providing a retarding torque to engine rotation to increase the decay rate of the engine speed during an upshift. These devices include an engine brake and an input shaft brake. A retarding torque is also provided by increasing engine accessory load by controlling various engine accessories such as a cooling fan, an air compressor, a hydraulic pump, an air conditioning compressor, and an alternator.

System and method for decreasing ratio changing time in electronically enhanced powertrain systems

System and method for decreasing ratio changing time by actuating

A control and control method for a semi-automatic mechanical transmission system (10) is provided for sensing operator request for a direct downshift into an optimum pull-away ratio and for automatically determining and engaging the optimum pull-away ratio. The optimum pull-away ratio (GR.sub.PULL-AWAY) is adaptively selected as a function of throttle position (THL&gt;REF.sub.THL).

Adaptive pull-away ratio selection

A control system and method for a vehicular semi-automatic mechanical transmission system (10) is provided for continuously informing the operator of available ratios and for permitting selection of a desired shift (GR.sub.T(2)), which will be immediately implemented, regardless of the previous selection or ongoing shift implementation, of engagement of a previously selected target ratio (GR.sub.T(2)). During a shift transient to engage a selected target ratio (GR.sub.T(1)), the display will show the maximum available upshifts and downshifts from the target ratio, and shift requests will be interpreted as requests for upshifts and downshifts from the initial target ratio (GR.sub.T(1)) into a new target ratio (GR.sub.T(1)).

Continuous selection control for semi-automatic mechanical transmission

A control system and method for a semi-automatic mechanical transmission system (10) is provided for sensing rolling start conditions (OS&gt;REF, GR=N, (CLUTCH MANUAL DISENGAGED=TRUE)) and upon sensing such conditions, allowing operator request for a direct shift into an appropriate rolling start gear ratio (GR.sub.RS) determined as a function of current and/or expected output shaft speed (GR.sub.RS .gtoreq.ES.sub.IDLE /OS).

Rolling start control system/method for semi-automated mechanical

System and method for decreasing ratio changing time in electronically

A control system and method for a vehicular semi-automatic mechanical transmission system (10) is provided for allowing operator request, immediately after bringing a vehicle to rest, for both a direct shift into a preselected start ratio and a direct shift into neutral, under certain predefined conditions, by a single movement of the shift selection lever (1).

Start ratio selection system and method

A three-position actuator assembly for selectively shifting a three-speed splitter type auxiliary transmission section (14) is provided. The actuator assembly includes a piston portion (160) for axially moving a selected one of two shift forks (142/148) and a pneumatic control circuit (162) comprising three three-way, two-position solenoid controlled valves (202/204/206) and two three-way shuttle valves (214/216). Only one solenoid is energized for each selectable actuator position and a failure of the pneumatic (200) or electrical power sources to the control circuit will not cause the actuator to shift out of an engaged ratio.

Three-position shift actuator

A control system and method for a semi-automatic mechanical transmission system (10) is provided for allowing operator request for a scrolling display of allowable ratios in either the upshift or downshift direction, and for a direct shift into the selected one of the displayed ratios. In one embodiment, retaining the control (1) lever in a displaced position for one or two seconds will initiate the scrolling display, while retaining the transmission engaged in the initial ratio, and subsequently release of the control lever to its centered position will cause a direct shift into the then displayed ratio.

Scrolling gear ratio selection control system and method

A control system and method for a semi-automatic mechanical transmission system (10) is provided for allowing operator request for a direct upshift and/or downshift into a preselected start ratio, under certain predefined conditions, by a single movement, or two movements, of the shift lever (1).

Start ratio selection control system and method

A method and control for controlling an AMT system (10) having input shaft (IS) and output shaft (OS) speed sensors is provided including sensing faulty determinations of transmission engagement in a known gear ratio (GR).

Control and method for controlling AMT system including in-gear fault

An emergency device (2) for allowing manual limp home/get off road shifting of an automatic/semiautomatic mechnical transmisssion of the type having an electrically controlled shifter (30) including a plurality of electrically initialed shifting drivers (solenoids S1-S6) is provided.

Transmission with a detachable emergency ratio selector

An improved control method and control system for controlling the upshifting of an AMT (10) system including a compound splitter type semi-blocked transmission (12) is provided. In particular, different control logic is utilized to implement simple and compound upshifts of the transmissions.

Method for upshifting a compound semi-blocked splitter type automatic

A control system and method for a semi-automatic mechanical transmission system (10) is provided for sensing high resistance to vehicle forward movement and allowing engagement of a gear ratio lower than the lowest engageable ratio at substantially constant vehicle speed.

Semi-automatic mechanical transmission control and control method

A control system and method for a semi-automatic mechanical transmission system (10) is provided for allowing operator request for a direct downshift into transmission neutral, under certain predefined conditioned, by a single movement of the shift lever (1).

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Chorley, United Kingdom

John E Stainton