US 11,685,374 B2
Inching system for a construction vehicle
Gianpiero Negri, Mercato San Severino (IT); Antonio Oddo, Turin (IT); Alessandro Benevelli, Reggio nell″Emilia (IT); Adriano Garramone, Lecce (IT); Mario Girardi, Lecce (IT); Giovanni Notarnicola, Putignano (IT); and Andrea Gravili, Lecce (IT)
Assigned to CNH Industrial America LLC, New Holland, PA (US)
Appl. No. 16/630,777
Filed by CNH Industrial America LLC, New Holland, PA (US)
PCT Filed Jul. 12, 2018, PCT No. PCT/EP2018/068881
§ 371(c)(1), (2) Date Jan. 13, 2020,
PCT Pub. No. WO2019/012023, PCT Pub. Date Jan. 17, 2019.
Claims priority of application No. 102017000078668 (IT), filed on Jul. 13, 2017.
Prior Publication US 2021/0078579 A1, Mar. 18, 2021
Int. Cl. B60W 10/103 (2012.01); B60W 30/18 (2012.01); B60W 10/184 (2012.01)
CPC B60W 30/18063 (2013.01) [B60W 10/103 (2013.01); B60W 10/184 (2013.01); B60W 2300/17 (2013.01); B60W 2510/0638 (2013.01); B60W 2510/18 (2013.01); B60W 2540/12 (2013.01); B60W 2710/1083 (2013.01); B60W 2710/18 (2013.01); B60Y 2200/415 (2013.01); B60Y 2300/18058 (2013.01); F16H 2312/06 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An inching system for a loading vehicle having ground engaging devices, a hydrostatic transmission, brakes, and an engine, the hydrostatic transmission having hydraulic fluid, the engine configured for driving a hydraulic pump that supplies the hydraulic fluid within the hydrostatic transmission, the hydrostatic transmission configured for providing rotational power to the ground engaging devices, the hydrostatic transmission further having a pilot pressure port with a pressure of the hydraulic fluid at the pilot pressure port controlling a level of the rotational power from the hydrostatic transmission, a beginning of draining of the hydraulic fluid from the pilot pressure port defining an inching starting point, the inching system comprising:
a brake pedal operable by an operator to activate the brakes of the loading vehicle;
an electrohydraulic valve hydraulically coupled to the pilot pressure port of the hydrostatic transmission, the electrohydraulic valve being configured to drain the hydraulic fluid at the pilot pressure port;
a sensor coupled to the brake pedal to detect an input from the operator, the sensor configured to produce a signal indicative of the input from the operator; and
a controller configured to receive the signal and an engine speed of the engine, the controller being further configured to control an electric current to control the electrohydraulic valve based upon the signal and the engine speed so that the inching starting point and an inching ending point do not change as the engine speed changes, the inching ending point being defined by an ending of the draining of the hydraulic fluid from the pilot pressure port.