What Is an Isokinetic Dynamometer?
Constant-speed fuel consumption is the fuel consumption of a vehicle of 100 kilometers obtained by a certain type of vehicle in the fuel consumption test of constant-speed driving specified by the national standard. These types of vehicles include:
- Chinese name
- Constant speed fuel consumption
- Constant-speed fuel consumption is the fuel consumption of a vehicle of 100 kilometers obtained by a certain type of vehicle in the fuel consumption test of constant-speed driving specified by the national standard. These types of vehicles include:
- (1) M1 and N1 compressed natural gas vehicles with a maximum design total mass not exceeding 3.5t; M1 and N1 vehicles with a maximum total design mass not exceeding 3.5t, according to GB / T 12545.1-2008 " Test Method for Fuel Consumption of Used Vehicles ".
- (2) M2, M3, N2, and N3 compressed natural gas vehicles with a maximum design total mass of more than 3.5t; M2, M3, and N-type vehicles with a maximum total mass of 2t or more, in accordance with GB / T 12545.2 -2001 "Test method for commercial vehicle fuel consumption test method".
Definition of constant speed fuel consumption
- Constant-speed fuel consumption is the fuel consumption of a vehicle of 100 kilometers obtained by a certain type of vehicle in the fuel consumption test of constant-speed driving specified by the national standard. These types of vehicles include:
- (1) M1 and N1 compressed natural gas vehicles with a maximum design total mass not exceeding 3.5t; M1 and N1 vehicles with a maximum total design mass not exceeding 3.5t, according to GB / T 12545.1-2008 " Test Method for Fuel Consumption of Used Vehicles ".
- (2) M2, M3, N2, and N3 compressed natural gas vehicles with a maximum design total mass of more than 3.5t; M2, M3, and N-type vehicles with a maximum total mass of 2t or more, in accordance with GB / T 12545.2 -2001 "Test method for commercial vehicle fuel consumption test method".
- M and N motor vehicles are defined in GB / T15089-2001.
Isokinetic fuel consumption test
- The test can be performed on the road or on a chassis dynamometer, and then the fuel consumption of 100 kilometers can be obtained by the "flow meter method" or the "carbon balance method". Passenger car fuel consumption test methods use 90km / h and 120km / h; in commercial vehicle fuel consumption test methods, the vehicle speed starts from 20km / h, and the vehicle speed is uniformly selected at an integral multiple of the vehicle speed of 10km / h until the maximum speed is reached. 90%, determine at least 5 test vehicle speeds. For road tests, the test conditions, test methods, and test road selection standards in the national standard must be followed. The experimental conditions include: the load of the test vehicle, the accuracy of the test equipment, the choice of fuel, tires, ambient temperature, humidity, air pressure, and wind speed. The test method includes the choice of gear and vehicle speed. Test road selection: The "Test Method for Fuel Consumption of Passenger Cars" stipulates closed loop roads or straight roads above 2km; the "Test Method for Fuel Consumption of Commercial Vehicles" stipulates that the test road length is 500m. When testing the chassis dynamometer, the dynamometer characteristics, laboratory conditions, vehicle preparation, and test procedures are also specified. [1]