US 10,895,321 B2Granted

High efficiency, high output transmission

AssigneeEaton Cummins Automated Transmission Technologies, LLC

InventorsPaul Peterson, Graeme Andrew Jackson, Timothy Scott Smith, Paul Wilson, Christian Chimner, Andrzej Wota, Thomas Connolly, Joseph Paul Furner, Sipei Chen, Ian Daniel McKenzie, Christopher DeBoer

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Abstract

A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. A shift control circuit operates a shift actuator using a first opposing pulse command and a first actuating pulse command, and releases pressure with shift actuating and opposing volumes of the shift actuator upon determining a shift completion event.

Claims26

Dependent claims

A transmission, comprising:

an input shaft configured to couple to a prime mover;
a countershaft having a first plurality of gears mounted thereon;
a main shaft having a second plurality of gears mounted thereon;
an output shaft selectively providing a torque output to a driveline;
a shift actuator structured to selectively couple the input shaft to the main shaft by rotatably coupling at least one of the first plurality of gears to the countershaft and the second plurality of gears to the main shaft, wherein the shift actuator is mounted on an exterior wall of a housing, and wherein the countershaft and the main shaft are at least partially positioned within the housing;
an integrated actuator housing, wherein the shift actuator is operationally coupled to the integrated actuator housing, and wherein the integrated actuator housing comprises a single external power access for the shift actuator;
a controller, comprising:
a shift control circuit structured to:
provide a first opposing pulse command, the first opposing pulse command comprising a first predetermined amount of air above an ambient amount of air in a first closed volume, wherein pressure in the first closed volume opposes movement of the shift actuator in a shift direction;
determine a second predetermined amount of air in response to at least one of a speed of at least one of the shafts, an air supply pressure, and a transmission temperature value, the second predetermined amount of air comprising an amount of air above an ambient amount of air in a second closed volume, wherein pressure in the second closed volume promotes movement of the shift actuator in the shift direction;
provide a first actuating pulse command, the first actuating pulse command comprising the second predetermined amount of air;
and
release pressure in the first closed volume and the second closed volume in response to determining a shift completion event;
and
wherein the shift actuator is responsive to the first opposing pulse command and the first actuating pulse command.

12 more elements

A transmission, comprising:

an input shaft configured to couple to a prime mover;
a countershaft having a first plurality of gears mounted thereon;
a main shaft having a second plurality of gears mounted thereon;
an output shaft selectively providing a torque output to a driveline;
a shift actuator structured to selectively couple the input shaft to the main shaft by rotatably coupling at least one of the first plurality of gears to the countershaft and the second plurality of gears to the main shaft, wherein the shift actuator is mounted on an exterior wall of a housing, and wherein the countershaft and the main shaft are at least partially positioned within the housing;
an integrated actuator housing, wherein the shift actuator is operationally coupled to the integrated actuator housing;
a clutch actuator housing, wherein a clutch actuator is positioned at least partially within the clutch actuator housing, and wherein the clutch actuator housing is one of coupled to the integrated actuator housing and comprising a portion of the integrated actuator housing;
a controller, comprising:
a shift control circuit structured to:
provide a first opposing pulse command, the first opposing pulse command comprising a first predetermined amount of air above an ambient amount of air in a first closed volume, wherein pressure in the first closed volume opposes movement of the shift actuator in a shift direction;
determine a second predetermined amount of air in response to at least one of a speed of at least one of the shafts, an air supply pressure, and a transmission temperature value, the second predetermined amount of air comprising an amount of air above an ambient amount of air in a second closed volume, wherein pressure in the second closed volume promotes movement of the shift actuator in the shift direction;
provide a first actuating pulse command, the first actuating pulse command comprising the second predetermined amount of air;
and
release pressure in the first closed volume and the second closed volume in response to determining a shift completion event;
and
wherein the shift actuator is responsive to the first opposing pulse command and the first actuating pulse command.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/663,144Filed 28 Jul 2017 · us provisional application
Priority: 22 Dec 2016
Published: US 2018/0180166 A128 Jun 2018
Granted: 19 Jan 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification61 codes

F16H 59/0204
Selector apparatus: for automatic transmissions with means for range selection and manual shifting, e.g. range selector with tiptronic
F16H 61/30
With at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted: hydraulic or pneumatic…
B60W 10/02
Conjoint control of vehicle sub-units of different type or different function: including control of driveline clutches
B60W 10/11
Including control of change-speed gearings: stepped gearings