The testing technique outlined in this SAE Recommended Practice was developed as part of an overall program for testing and evaluation fuel consumption of heavy-duty trucks and buses. The technique outlined in this recommended practice provides a general description of the type of equipment and facility which is necessary to determine the power consumption of these engine-driven components. It is recommended that the specific operating conditions suggested be carefully reviewed on the basis of actual data obtained on the specific vehicle operation. Because of the variation in size@ shape@ configuration@ and mountings available in cooling fans and fan drive systems@ specific test devices have not been included. Using known power/speed relationships for a given fan as developed by SAE J1339@ Test Method for Measuring Power Consumption of Cooling Fans for Trucks and Buses@ this procedure can be used to calculate the fan power requirements for truck and bus cooling systems using fixed-ratio@ speed-modulating@ and on-off fan drive control. Purpose-The purpose of the SAE Recommended Practice is to provide a recommended test procedure for measuring and comparing the power consumption of fan drives used on a truck or bus over a variety of operating conditions. The resulting power consumption data is useful in predicting the fuel consumption of trucks and buses using these fan drives and in comparing one fan drive against another on the basis of power consumption.
SAE J1342-1981 history
2022SAE J1342-2022 Test Method for Determining Power Consumption of Cooling Fan Drive Systems
2017SAE J1342-2017 Test Method for Determining Power Consumption of Engine Cooling Fan Drive Systems
2012SAE J1342-2012 Test Method for Determining Power Consumption of Engine Cooling Fan Drive Systems
2007SAE J1342-2007 Test Method for Determining Power Consumption of Engine Cooling Fan Drive Systems
2001SAE J1342-2001 Test Method for Determining Power Consumption of Engine Cooling Fan-Drive Systems
1994SAE J1342-1994 METHOD FOR DETERMINING POWER CONSUMPTION OF ENGINE COOLING FAN-DRIVE SYSTEMS
1989SAE J1342-1989 Method for Determining Power Consumption of Engine Cooling Fan-Drive Systems
1981SAE J1342-1981 Test Method for Measuring Power Consumption of Fan Drive Systems for Trucks and Buses