Device for supplying lubricant to a lubrication point in a machine

A device for supplying lubricant to a lubrication point in a machine, the device comprising:

• a lubricant pump configured to supply a quantity of lubricant to the lubrication point;
• a sensor unit including:
• a first pressure sensor located outside a region of the lubrication point, the first pressure sensor being configured to measure an external environmental pressure outside the region of the lubrication point and to generate a first sensor measurement signal based upon the measured external environmental pressure, and
• a second pressure sensor located within the region of the lubrication point, the second pressure sensor being configured to measure a pressure of the lubricant at the lubrication point and to generate a second sensor measurement signal based upon the measured pressure of the lubricant,
• a temperature sensor located in the region of the lubrication point for measuring a temperature of the lubricant at the lubrication point, the temperature sensor being configured to generate a third sensor measurement signal, and
• a control unit operably coupled to the first and second pressure sensors and configured to regulate the lubricant pump to vary the quantity of lubricant supplied to the lubricant point based at least in part on the first and second sensor measurement signals,
• wherein the control unit is configured to regulate the lubricant pump to vary the quantity of lubricant based at least in part on a differential signal of the first sensor measurement signal and the second measurement signal,
• wherein the control unit is configured to regulate the lubricant pump to vary the quantity of lubricant based at least in part on a sum signal of the third sensor measurement signal and the differential signal.