Patent ID: 9581074
Date: 2017-02-28
CPC Classifications: B01D,F01P

Claim:
1. A thermostat assembly configured for use with an engine cooling system, the thermostat assembly comprising: a thermostat having thermostatic valve that moves between a closed position and an open position; a frame that supports the thermostat and is positioned upstream of the thermostatic valve, the frame defining a primary coolant passage; a bypass valve disposed on the frame that selectively defines a bypass coolant passage and that moves between (i) a normally closed position wherein coolant is inhibited from passing through the bypass valve and (ii) an open position wherein coolant is free to pass through the bypass coolant passage and to the thermostat; and an integrated filter positioned on the frame upstream of the thermostat and configured to filter coolant flowing through the primary coolant passage to the thermostat; wherein the bypass valve moves from the normally closed position to the open position upon being subjected to a pressure above a predetermined pressure threshold caused by a reduction in a coolant flow rate through the filter and the primary coolant passage so as to provide the bypass coolant passage bypassing the filter.