A Test Study of Cylinder Head Temperature Field for off-Road Horizontal Diesel Engine

In order to analyze and evaluate the heat-load of the cylinder head in a new generation of off-road horizontal diesel engine under the rated power conditions,which has been designed and developed independently by the authors and their affiliations,the operating-temperature of the critical-point in the cylinder head fire-surface and the underside face of the cooling water jacket of cylinder head are tested respectively by the hardness plug thermometry method and thermal resistance thermometry,and the water pressure and temperature values of the critical-point in the cooling water jacket of cylinder head are tested respectively by Pressure sensors and platinum resistance temperature sensor.The results indicate that the cooling effect in cylinder head is better,and the design of the overall structure is reasonable.The heat-load of the cylinder head is not high,and the maximum temperature of the test critical-point in the cylinder head fire-surface is 339℃,which is in the central area and close to the side of the exhaust valve of the second cylinder combustion chamber,and the maximum temperature of the underside face of the cooling water jacket of cylinder head is 211.8℃,which is in the bridge of the nose between the inlet and exhaust valve of he second cylinder.