Caterpillar Inc.

Caterpillar Sarl

Peter O'Brien

Stephen Thompson

Adam J Adeeb

Biagio Ciarla

Barry E James

Darshan C Patel

A system and method for detecting a pre-charge pressure of a hydraulic braking system are disclosed. A controller receives pressure readings from a pressure sensor indicative of the pressure of a hydraulic brake accumulator or the lower pressure of more than one accumulator. In response to fluid being provided to the hydraulic accumulator, the controller determines a first rate of pressure change, a second rate of pressure change different than the first rate, and a transition pressure between the first and second rates. The controller determines an approximate pre-charge pressure of the hydraulic brake accumulator based on the transition pressure. A warning can be provided to the operator or another when the determined pre-charge pressure is lower than a reference pressure.

Hydraulic accumulator pre-charge pressure detection for hydraulic braking system

A method of controlling the temperature of a brake arrangement for a machine is disclosed. The method includes providing a flow of pressurized fluid to the brake arrangement and sensing a first temperature of the fluid downstream of the brake arrangement. The method also includes determining a first temperature range for the brake arrangement and determining if the first sensed temperature falls in the first temperature range. The method also includes requesting an adjustment of at least one fluid parameter of the flow of pressurized fluid in response to determining that the first sensed temperature does not fall within the first temperature range such that the sensed temperature moves to the first temperature range.

Method and arrangement for machine cooling

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Sunderland, United Kingdom

Peter O'Brien