Effects of the Differences in Driving Behavior on Fuel Economy and Emission Characteristics during Vehicle Simulator Execution
Fuel economy and exhaust gas regulations around the world have become increasingly stringent year by year. In Europe, the real driving emission (RDE) system was introduced for evaluating the exhaust gas emitted from the road-going vehicles produced after September 2017. There are many cases where each automobile manufacturer has executed exhaust gas tests using actual vehicles on development vehicles. However, the “hardware in the loop simulator” (HILS) was developed recently for improving vehicle development efficiency. The HILS, combined with an actual engine, which is called the extended HILS, has been applied recently for the evaluation of compliance with emission standards. However, if the driver model used in the vehicle simulation does not correctly simulate actual human driving operations, some performance aspects in the development will differ from those in the actual vehicle evaluation, and these aspects must be readjusted.