On-engine fluid monitoring system

An engine, comprising:

• a pump;
• a cooler bypass in fluid communication with, and downstream of, the pump, the cooler bypass including a bypass valve and being in fluid communication with a bypass conduit and a cooler flow conduit;
• an oil cooler in fluid communication with, and downstream of, the cooler bypass;
• and
• a monitoring system fluidly coupling a first location upstream of the cooler bypass to a second location downstream of the oil cooler, the monitoring system including a flow restrictor configured to provide a predetermined pressure and flow of a fluid to flow through the monitoring system from the first location to the second location,
• wherein the monitoring system is configured to measure a characteristic of the fluid flowing through the monitoring system,
• wherein the cooler bypass and the oil cooler are in a first flow path for the fluid, and
• wherein the monitoring system is in a second flow path for the fluid distinct from the first flow path.

A lubrication system for an engine, comprising:

• an oil cooler including a cooler inlet and a cooler outlet, the cooler inlet upstream of the cooler outlet;
• a cooler bypass having a bypass valve and being in fluid communication with a bypass conduit and a cooler flow conduit to the oil cooler;
• a first location upstream of the cooler inlet and the cooler bypass;
• a second location downstream of the cooler outlet;
• and
• a monitoring device including an input conduit and an output conduit, the input conduit in fluid communication with the first location, the output conduit in fluid communication with the second location, one of the input conduit and the output conduit including a flow restrictor configured to provide a predetermined pressure and flow of a fluid to the monitoring device via the input conduit,
• wherein the monitoring device is configured to measure a characteristic of the fluid flowing to the monitoring device via the input conduit, and
• wherein the input conduit and the output conduit are distinct from the bypass conduit and the cooler flow conduit.