Fuel Consumption Norms
Fuel consumption norms determine the procedures for the (metrological) determination of the fuel consumption. For the vehicle buyer they provide a basis for comparing different vehicle models.
Based on the driving style, road and traffic conditions, environment and vehicle condition and fitment, in practice, fuel consumption values that vary from the values determined by the standards will arise.
Until 1996 the usual manufacturer's data of the fuel consumption of passenger cars corresponded to the DIN standard 70030 part 1. The inspection contained the following points:
Related to Vehicle:
Vehicle in serial production
Engine run-in (min. 3,000 km (1,864 miles))
Service temperature
Related to Inspection:
Standard drive with driving cycle according to ECE-R 15 ("ECE-cycle")
Constant drive at 90 km/h (56 mph)
Constant drive at 120 km/h (75 mph) (if vmax>130 km/h (81 mph))
Additional conditions:
Fuel according to DIN 51600 (Otto, leaded)
DIN 51607 (Otto, unleaded)
DIN 51601 (diesel)
Environmental conditions P0 = 1 bar; T0 = 293 K
(air density may deviate by +/- 7.5% from this condition)
Wind speed vW<3m/s
The fuel consumption values are then presented as follows:
City cycle : 11.5l/100 km
90 km/h : 7.0l/100km
120 km/h : 9.2l/100 km
or according to the standards:
Consumption DIN 70030-1 - 11.5 x 7.0 x 9.2.
Fig. 3-17 presents the driving cycle which is applicable to city traffic.
The driving cycle consists of 22 phases (idling, acceleration, constant drive, deceleration). Driving through this cycle four times results in a cycle length of 3.052 km (2.519 miles), a test duration of 13 minutes, and an average speed of 18.7 km/h (11.6 mph).