Automatic Shift Control System for a Powertrain and Method
First Claim
1. A machine, comprising an implement being liftable at a height and tiltable at an orientation, a transmission arranged to interconnect a prime mover of the machine with ground engaging members of the machine at a selectively variable ratio such that the machine can travel along a travel surface at a ground speed, the machine comprising:
- a control device associated with the transmission and responsive to selectively vary the selectively variable ratio in response to a shift signal;
a lift sensor associated with the implement, the lift sensor configured to monitor a parameter indicative of a position of the implement with respect to the travel surface and provide a lift signal indicative of the position;
a ground speed sensor configured to monitor the ground speed of the machine and provide a ground speed signal indicative of the ground speed;
a controller associated with the control device, the lift sensor, and the ground speed sensor, the controller disposed to;
monitor the lift signal and the ground speed signal;
compare the lift signal to a predetermined position range;
compare the ground speed signal to a predetermined ground speed range; and
when the ground speed signal is within the predetermined ground speed range and the lift signal is within the predetermined position range, provide a shift signal to the control device, which shift signal causes the selectively variable ratio of the transmission to change.
1 Assignment
0 Petitions
Accused Products
Abstract
A machine powertrain having a transmission includes a control device responsive to selectively vary the transmission ratio in response to a shift signal. A lift sensor associated with a machine implement monitors an implement position and provides a lift signal. A ground speed sensor monitors the ground speed and provides a ground speed signal. A controller monitors the lift and ground speed signals, compares the lift signal to a predetermined position range, compares the ground speed signal to a predetermined ground speed range and, when the ground speed signal is within the predetermined ground speed range and the lift signal is within the predetermined position range, provides the shift signal causing the selectively variable ratio of the transmission to change.
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Citations
20 Claims
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1. A machine, comprising an implement being liftable at a height and tiltable at an orientation, a transmission arranged to interconnect a prime mover of the machine with ground engaging members of the machine at a selectively variable ratio such that the machine can travel along a travel surface at a ground speed, the machine comprising:
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a control device associated with the transmission and responsive to selectively vary the selectively variable ratio in response to a shift signal; a lift sensor associated with the implement, the lift sensor configured to monitor a parameter indicative of a position of the implement with respect to the travel surface and provide a lift signal indicative of the position; a ground speed sensor configured to monitor the ground speed of the machine and provide a ground speed signal indicative of the ground speed; a controller associated with the control device, the lift sensor, and the ground speed sensor, the controller disposed to; monitor the lift signal and the ground speed signal; compare the lift signal to a predetermined position range; compare the ground speed signal to a predetermined ground speed range; and when the ground speed signal is within the predetermined ground speed range and the lift signal is within the predetermined position range, provide a shift signal to the control device, which shift signal causes the selectively variable ratio of the transmission to change. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for predicting and managing a change in torque in a machine powertrain that includes a prime mover driving ground engaging members via a transmission having a selectively variable power transmission ratio, the method comprising:
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monitoring at least one of a position and an orientation of a work implement of a machine; monitoring a ground speed of the machine; determining whether the at least one of the position and orientation of the work implement is within a respective predetermined range; determining whether the ground speed is below a threshold value; and when the at least one of the position and orientation of the work implement is determined to be within the respective predetermined range, and the ground speed is below the threshold value, causing the transmission to downshift. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An automatic shift control system for a powertrain of a machine, the machine having an implement being liftable at a height and tiltable at an orientation, the powertrain including a transmission arranged to interconnect a prime mover of the machine with ground engaging members of the machine at a selectively variable ratio such that the machine can travel along a travel surface at a ground speed, the automatic shift control system further comprising:
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a control device associated with the transmission and responsive to selectively vary the selectively variable ratio in response to a shift signal; a lift sensor associated with the implement, the lift sensor configured to monitor a parameter indicative of a position of the implement with respect to the travel surface and provide a lift signal indicative of the position; a ground speed sensor configured to monitor the ground speed of the machine and provide a ground speed signal indicative of the ground speed; a controller associated with the control device, the lift sensor, and the ground speed sensor, the controller disposed to; monitor the lift signal and the ground speed signal; compare the lift signal to a predetermined position range; compare the ground speed signal to a predetermined ground speed range; and when the ground speed signal is within the predetermined ground speed range and the lift signal is within the predetermined position range, provide a shift signal to the control device, thus causing the selectively variable ratio of the transmission to change. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification