US 7,430,936 B2Granted

Method for the control of operational sequencing in an automatic transmission of auxiliary construction

AssigneeZF Friedrichshafen AG

InventorsRainer Petzold, Mario Steinborn, Stefan Veittinger

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Abstract

A method for controlling operational sequencing of gears in an automatic transmission (102) which has been built in an auxiliary mode. In the case of such a shifting transmission it is possible that during the engagement of its transmission gear stage, impact noises or contact noises are present in the shifting procedure. This can occur by the generation of a tooth-on-tooth positioning between the toothing of a sliding collar (126) and the come-along toothing of an idler gear (130, 132). Provision is made for the control of the activation movement of the sliding collar (126) carried out in such a manner that an activation condition impact of the transmission parts, which are partakers in the shifting associated transmission part onto other transmission parts with the least possible impact force and/or with a least possible impact noise level.

Claims20

Dependent claims

A method for controlling operational sequencing in an automatic transmission (102) of an auxiliary design, with at least one input drive shaft (110) and at least one output drive shaft (112), and including on the input and the output drive shafts (110, 112) rotationally supported idler gears (130, 132) and fixed gears which serve for formation of gear stages when meshed with one another in tooth engagement, with at least one sliding collar (126) which is axially slidable and fixed to a transmission shaft (128), adjacent at least one idler gear (130, 132) and can be axially movable toward the idler gear (130, 132) by an actuator apparatus (118, 120, 122) so that a toothing engagement of the sliding collar (126) with a come-along toothing of the idler gear (130, 132) meshes, control of the actuator apparatus (118, 120, 122) for moving the sliding collar (126) is effected by a regulating component of a control center (136), control action being based on data from sensor information regarding an operational state of the transmission (102), and by which tooth-to-tooth positioning between toothing of the sliding collar (126) and the come-along toothing of the idler (130, 132) is thereby released, so that the toothing of the sliding collar (126) and the come-along toothing of the idler (130, 132) reference one another, the method comprising the steps of:

providing the transmission (102) with a piston distance instrument (3) for determining a position of a shifting piston (2), during a shifting procedure, and coupling the piston distance instrument (3) to the control center (136) for providing sensed information thereto;
providing the transmission (102) with at least one other sensor (15, 16, 17, 18) and coupling the at least one other sensor (15, 16, 17, 18) to the control center (136)) for providing sensed information thereto, wherein the at least one other sensor (15, 16, 17, 18) is one of an air noise sensor and a bodily noise sensor;
and
controlling an activation motion of the actuator apparatus (118, 120, 122), during the operational sequencing of the automatic transmission (102), based upon sensed information received from both the piston distance instrument (3) and the at least one sensor (15, 16, 17, 18) so as to minimize an impact force and impact noise of transmission parts, involved in the shifting procedure, upon other transmission parts, whereby shifting noise and mechanical stressing of the transmission parts involved during the shifting procedure are minimized.

1 more element

A method for controlling an operational sequencing of an automatic transmission (102) of an auxiliary design having at least one input drive shaft (110) and at least one output drive shaft (112) and having at least two rotationally supported idler gears (130, 132) and fixed gears on the input and the output drive shafts (110, 112) which serve for formation of gear stages upon meshing engagement with one another, at least one sliding collar (126) being axially slidable and fixed to a transmission shaft (128), adjacent at least one idler gear (130, 132) and being axially movable toward the idler gear (130, 132) by an actuator apparatus (118, 120, 122) so that a toothing of the sliding collar (126) engages a mating toothing of the idler gear (130, 132), and control of the actuator apparatus (118, 120, 122) being effected by a regulating component of a control center (136) and being based on data from sensor information regarding an operational state of the transmission (102), and by which tooth-to-tooth positioning between the sliding collar (126) and the idler gear (130, 132) is released, so that the toothing of the sliding collar (126) and the toothing of the idler gear (130, 132) reference one another, the method comprising the steps of:

providing the transmission (102) with a piston distance instrument (3) for determining a position of a shifting piston (2), during a shifting procedure, and coupling the piston distance instrument (3) to the control center (136) for supplying sensed information thereto;
providing the transmission (102) with at least a first sensor (15, 16) and coupling the at least first sensor (15, 16) to the control center (136)) for supplying sensed information thereto, wherein the at least first sensor (15, 16) is one of an air noise sensor and a bodily noise sensor;
providing the transmission (102) with at least a second sensor (17, 18) and coupling the at least second sensor (17, 18) to the control center (136)) for supplying sensed information thereto, wherein the at least second sensor (15, 16, 17, 18) is a pressure sensor for sensing an actuation pressure;
and
controlling of an activation motion of the actuator apparatuses (118, 120, 122) during the operational sequencing of the automatic transmission (102) based upon the sensed information received from the piston distance instrument (3) and the at least first and second sensors (15, 16, 17, 18), so as to minimize an impact force and impact noise of transmission parts, involved in the shifting procedure, upon other transmission parts whereby shifting noise and mechanical stressing of the transmission parts involved during the shifting procedure are minimized.

2 more elements

providing the transmission (102) with a piston distance instrument (3) for determining a position of a shifting piston (2), during a shifting procedure, and coupling the piston distance instrument (3) to the control center (136) for supplying sensed information thereto;
providing the transmission (102) with a first sensor (15) and coupling the first sensor (15) to the control center (136)) for supplying sensed information thereto, wherein the first sensor (15) is an air noise sensor;
providing the transmission (102) with a second sensor (16) and coupling the second sensor (16) to the control center (136)) for supplying sensed information thereto, wherein the second sensor (16) is a bodily noise sensor;
providing the transmission (102) with a third sensor (17) and coupling the third sensor (17) to the control center (136)) for supplying sensed information thereto, wherein the third sensor (17) is a first pressure sensor for sensing an actuation pressure being supplied to the shifting piston (2);
and
providing the transmission (102) with a fourth sensor (18) and coupling the fourth sensor (15) to the control center (136)) for supplying sensed information thereto, wherein the fourth sensor (18) is a second pressure sensor for sensing an actuation pressure being discharged from the shifting piston (2);
controlling of an activation motion of the actuator apparatuses (118, 120, 122) during the operational sequencing of the automatic transmission (102) based upon the sensed information received from the piston distance instrument (3) and the first, the second, the third and the fourth sensors (15, 16, 17, 18), so as to minimize an impact force and impact noise of transmission parts, involved in the shifting procedure, upon other transmission parts whereby shifting noise and mechanical stressing of the transmission parts involved during the shifting procedure are minimized.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/370,070Filed 7 Mar 2006
Priority: DE 10 2005 011 27311 Mar 2005
Published: US 2006/0213300 A128 Sep 2006
Granted: 7 Oct 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

F16H 61/28
Generation or transmission of movements for final actuating mechanisms: with at least one movement of the final actuating mechanism being caused…
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…
F16H 63/3023
Constructional features of the final output mechanisms: the final output mechanisms comprising elements moved by fluid pressure
F16H 2061/2823
With at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted: controlling actuator…