Hydraulic circuit for an adaptive park braking system and method of operation thereof

Patent metadata

Field	Value
Publication number	US-11649608-B2
Application number	US-201816604650-A
Country	US
Kind code	B2
Filing date	Apr 10, 2018
Priority date	Apr 11, 2017
Publication date	May 16, 2023
Grant date	May 16, 2023

Abstract

A hydraulic circuit for an adaptive park braking system and method of operation thereof. The method of operating an adaptive park braking system includes providing a vehicle having a motor, a front axle system, a rear axle system, wherein the front axle system has one or more front axle braking systems and the rear axle system has one or more rear axle braking systems. Identifying when the vehicle is engaged in a digging operation. Disconnecting the front axle system or the rear axle system from driving engagement with the motor of the vehicle. Activating the one or more braking systems of the disconnect axle system to apply an amount of force to the disconnected axle system of the vehicle. Then applying an amount of torque with the motor to the axle system in driving engagement with the motor.

First claim

What is claimed is:

1. A method of operating an adaptive park braking system, comprising:
providing a vehicle having a motor, a front axle system, a rear axle system, wherein said front axle system has one or more front axle braking systems and said rear axle system has one or more rear axle braking systems;
identifying when said vehicle is engaged in a digging operation;
disconnecting said front axle system or said rear axle system from driving engagement with said motor of said vehicle;
activating said one or more braking systems of said disconnect axle system to apply an amount of force to said disconnected axle system of said vehicle; and
determining an amount of torque needed to reduce, minimize cancel out and/or eliminate the movement experienced by said vehicle when engaged in said digging operation identified;
applying the amount of torque with said motor to said axle system in driving engagement with said motor.

2. The method of operating an adaptive park braking system of claim 1 , further comprising the step of identifying whether or not said vehicle is moving when engaged in said digging operation identified.

3. The method of operating an adaptive park braking system of claim 2 , further comprising the steps of:
determining said speed in which said vehicle is moving when engaged in said digging identified; and/or
determining said direction in which said vehicle is moving when engaged in said digging operation identified.

4. The method of operating an adaptive park braking system of claim 2 , further comprising the steps of:
monitoring and determining continuously said speed in which said vehicle is moving and/or said direction in which said vehicle is moving when engaged in said digging operation identified;
updating continuously an amount of torque needed to reduce, minimize cancel out and/or eliminate said movement experienced by said vehicle when engaged in said digging operation identified; and
changing continuously said amount of torque applied to said axle system in driving engagement with said motor based on said updated amount of torque determined to reduce, minimize cancel out and/or eliminate the movement experienced by said vehicle when engaged in said digging operation identified.

5. The method of operating an adaptive park braking system of claim 2 , further comprising the steps of:
reducing and/or eliminating one or more pits generated under one or more wheels of said vehicle when engaged in said digging operation identified.

6. An adaptive park braking hydraulic circuit, comprising:
one or more service brake hydraulic lines in fluid communication with at least a portion of said one or more service brake hydraulic lines by one or more brake pressure sensor hydraulic lines;
the one or more service brake assemblies in fluid communication with at least a portion of said one or more service brake hydraulic lines;
one or more adaptive park brake (APB) supply hydraulic lines;
one or more power supply hydraulic lines in fluid communication with at least a portion of a motor or pump having a line A and a Line B;
one or more parking brake hydraulic lines;
at least a portion of a first valve in fluid communication with at least a portion of said one or more parking brake hydraulic lines and at least a portion of said one or more APB supply hydraulic lines; and
at least a portion of one or more parking brake assemblies in fluid communication with at least a portion of said one or more parking brake hydraulic lines;
at least a portion of a second valve in fluid communication with at least a portion of said one or more service brake hydraulic lines and at least a portion of said one or more APB supply hydraulic lines;
a fourth valve in fluid communication with at least a portion of said one or more power supply hydraulic lines, at least a portion of said Line A and at least a portion of said line B.

7. The adaptive park braking hydraulic circuit of claim 6 , further comprising:
an adaptive park braking system supply circuit comprising a second motor or pump, a hydraulic output line, one or more intermediate hydraulic lines, one or more check valves, one or more accumulators, one or more hydraulic pilot lines, one or more hydraulic supply lines, a fifth valve and a seventh valve;
wherein at least a portion of said second motor or pump is in fluid communication with at least a portion of said hydraulic output line;
wherein at least a portion of said hydraulic output line of said second motor or pump is in fluid communication with at least a portion of said one or more power supply hydraulic lines;
wherein said one or more accumulators are in fluid communication with at least a portion of said one or more hydraulic supply lines and at least a portion of said hydraulic output line by said one or more intermediate hydraulic lines having said one or more check valves;
wherein at least a portion of said one or more hydraulic pilot lines are in fluid communication with at least a portion of said one or more hydraulic supply lines, at least a portion of said one or more intermediate hydraulic lines and said one or more accumulators;
wherein said fifth valve is in fluid communication with at least a portion of said one or more hydraulic pilot lines;
wherein at least a portion of said seventh valve is in fluid communication with at least a portion of said one or more APB supply hydraulic lines; and
wherein at least a portion of said one or more APB supply hydraulic lines are in fluid communication with at least a portion of said one or more hydraulic supply lines.

8. The adaptive park braking hydraulic circuit of claim 7 , wherein said an adaptive park braking system supply circuit further comprises:
a sixth valve; and
wherein at least a portion of said sixth valve is in fluid communication with at least a portion of said one or more parking brake hydraulic lines and at least a portion of said one or more hydraulic supply lines.

9. The adaptive park braking hydraulic circuit of claim 6 , further comprising:
a ninth valve;
wherein at least a portion of said ninth valve is in fluid communication with at least a portion of said one or more power supply hydraulic lines by a first ninth valve hydraulic line;

an eighth valve;
wherein at least a portion of said eighth valve is in fluid communication with at least a portion of said one or more service brake hydraulic lines and at least a portion of said one or more APB supply hydraulic lines;
wherein at least a portion of said eighth valve is in fluid communication with at least a portion of said ninth valve by a second ninth valve hydraulic line;

a tenth valve;
wherein at least a portion of said tenth valve is in fluid communication with at least a portion of said one or more power supply hydraulic lines;
wherein at least a portion of said tenth valve is in fluid communication with at least a portion of said second ninth valve hydraulic line by a first tenth valve hydraulic line;
wherein at least a portion of said tenth valve is in fluid communication with at least a portion of said eighth valve by a second tenth valve hydraulic line;

an eleventh valve;
wherein at least a portion of said eleventh valve is in fluid communication with at least a portion of said one or more power supply hydraulic lines, said line A of said motor or pump and said line B of said motor or pump;

a third valve; and
wherein said third valve is in fluid communication with at least a portion of said one or more power supply hydraulic lines and is interposed between said tenth valve and said eleventh valve on said one or more power supply hydraulic lines.

10. The adaptive park braking hydraulic circuit of claim 6 , further comprising

Assignees

• Dana Italia Srl

Inventors

• Cosoli Ettore
• Grott Matteo
• Moser Davide
• Ornella Giulio
• Schneider Mark M
• Serrao Lorenzo
• Vecchioni Bernhard
• Zendri Fabrizio

Classifications

• E02F3/32

  working downwardly and towards the machine, e.g. with backhoes · CPC title

• E02F9/2083 Primary

  Control of vehicle braking systems · CPC title

• B60T7/12 Primary

  for automatic initiation; for initiation not subject to will of driver or passenger {(limiting speed of vehicles other than rail vehicles B60K31/00)} · CPC title

• B60T13/16

  using pumps directly, i.e. without interposition of accumulators or reservoirs · CPC title

• E02F9/2062

  Control of propulsion units (for control of the prime mover depending on the load in a hydraulic or pneumatic drive E02F9/2246) · CPC title