Patent ID: 7194985
Filing Date: 2007-03-27
Classification: F01P

Abstract:
1. An engine provided with a cooling structure, the engine comprising: a casting having a water jacket formed therein and surrounding a portion of the engine; a radiator; a water pump for pumping coolant to the water jacket of the engine; a main circulation channel for returning the coolant which has passed through the water jacket to the water pump through the radiator; a bypass channel for returning the coolant which has passed through the water jacket to the water pump not through the radiator; and a thermostat which is operable to switch the operative channel for returning the coolant to the water pump, between the main circulation channel and the bypass channel according to coolant temperature, the thermostat being provided at a position close to the water pump, and a cover member installed on an outside of the engine crankcase, the cover member having a coolant passage formed therein which communicates with the water jacket through the water pump; wherein the water pump and the thermostat are operatively attached to the cover member, and; wherein the cover member is configured such that coolant discharged from the water pump is pumped to the water jacket through the coolant passage of the cover member without passing external to the engine.