US 10,890,165 B2
Controller and system for utility vehicle
David Mark Heathcoat, Greenville, TN (US); Kirk Ayres Lola, Rutherfordton, NC (US); Roger Paul Gray, II, Greenville, TN (US); Kerry Brock, Forest City, NC (US); and Michael T. Crosby, Jonesborough, TN (US)
Assigned to Parker-Hannifin Corporation, Cleveland, OH (US)
Filed by Parker-Hannifin Corporation, Cleveland, OH (US)
Filed on Nov. 30, 2016, as Appl. No. 15/364,656.
Application 15/364,656 is a continuation of application No. 14/699,245, filed on Apr. 29, 2015, abandoned.
Claims priority of provisional application 61/985,604, filed on Apr. 29, 2014.
Prior Publication US 2017/0082093 A1, Mar. 23, 2017
Int. Cl. F04B 1/295 (2020.01); B62D 3/14 (2006.01); B62D 6/02 (2006.01); F16H 63/50 (2006.01); F16H 61/47 (2010.01); F16H 61/431 (2010.01); B60T 13/16 (2006.01); F04B 1/146 (2020.01)
CPC F04B 1/295 (2013.01) [B60T 13/16 (2013.01); B62D 3/14 (2013.01); B62D 6/02 (2013.01); F04B 1/146 (2013.01); F16H 61/431 (2013.01); F16H 61/47 (2013.01); F16H 63/50 (2013.01); B60Y 2200/223 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A vehicle, comprising:
a pump including a swashplate tiltable about a swashplate tilt axis, wherein rotation of the swashplate changes a title angle of the swashplate and effects a change in volumetric displacement of the pump;
a controller operatively coupled to the swashplate to effect rotation of the swashplate, the controller comprising
a processor and memory;
a first input for receiving a user-controlled speed control signal;
a second input for receiving user-selected operating modes of the vehicle;
an output for providing a vehicle speed setpoint to effect rotation of the swashplate in order to control a speed of the vehicle; and
logic stored in the memory and executable by the processor, the logic configured to generate the vehicle speed setpoint based on the user-selected speed control signal, and change at least one of the user-controlled speed control signal or the vehicle speed setpoint based on the user-selected operating modes of the vehicle;
the vehicle further comprising:
a first driven wheel arranged on a first side of the vehicle;
a second driven wheel arranged on a second side of the vehicle;
at least one steerable wheel;
at least one steering attitude sensor coupled to the at least one steerable wheel and to the controller, the attitude sensor operative to communicate a steering attitude of the at least one wheel to the controller; and
at least one steering actuator operatively coupled to the at least one steerable wheel and to the controller,
logic configured to command the at least one steering actuator to turn the at least one steerable wheel based on a speed differential between the at least two driven wheels and data provided by the steering attitude sensor.