OIL SYSTEM FOR DIESEL ENGINES THAT OPERATE IN COLD ENVIRONMENTS

摘要

An aftermarket modification for diesel engines that operate in cold environments particularly those using a liquid-to-air oil cooler. Engine oil can be routed to a bypass module having a thermostatic element that directs the oil to bypass the oil cooler and return to the engine if the engine oil is below the desired temperature. Once the desired oil temperature is reached, the thermostatic element moves toward a closed position to direct oil through the oil cooler. A pressure bypass element can be incorporated into the bypass module. If the pressure differential between the inlet and outlet of the cooler exceeds a set point, the bypass element moves toward an open position to direct a portion of the oil to bypass the oil cooler.

主权项

1. A method of modifying a diesel engine for cold weather operation, said diesel engine having first and second engine oil ports comprising an engine oil outlet port and an engine oil return oil port, said method comprising:
providing a tee fitting; connecting the first engine oil port to the tee fitting; providing an oil cooler having first and second fluid ports for transmitting a flow of oil; providing a bypass module having first, second and third fluid ports; connecting a first branch of the tee fitting to the first fluid port of the oil cooler; connecting a second branch of the tee fitting to the first fluid port of the bypass module; connecting the second fluid port of the oil cooler to the second fluid port of the bypass module, the second fluid port of the bypass module communicating via an internal passageway with the third fluid port of the bypass module; connecting the third fluid port of the bypass module to the second engine oil port; and installing a thermostatic element in the bypass module that moves toward a first position to allow a flow of oil between the first fluid port of the bypass module and the third fluid port of the bypass module if the oil temperature is below a preset level and moves toward a second position to allow a flow of oil between the second fluid port of the bypass module and the third fluid port of the bypass module, whereby a flow of oil is directed to the oil cooler if the oil temperature is above a predetermined level.