No abstract

No abstract

No abstract

In this paper, heavy-duty commercial diesel vehicles were selected for the actual road, vehicle emission test system (PEMS), C-WTVC and CATC test, and each test was connected to the OBD remote monitoring equipment. Through PEMS test and C-WTVC test, the instantaneous fuel consumption data and carbon balance fuel consumption data of OBD remote monitoring equipment are compared within 10%, which proves that OBD remote monitoring has good accuracy. The fuel consumption of the actual road test normalized to CATC is 10.8%-88.0% higher than that of the ministry of industry and information technology type certification, with an average value of 45.1%. The fuel consumption under the normalized C-WTVC condition is 10.1%∼76.6% higher than that under the type approval of the ministry of industry and information technology, with an average value of 40.0% 23.9%. This difference is relatively smaller than that under the normalized to CATC. It is of great significance to correctly guide the development and calibration of vehicles and promote the research and application of vehicle energy conservation and emission reduction technologies suitable for China’s traffic characteristics and actual use characteristics.

The closed loop control architecture based on event feedback was proposed for airport taxiway head-on conflict prediction and avoidance in A-SMGCS (Advanced Surface Movement Guidance and Control System). Firstly, resource-oriented controlled colored Petri net was proposed and used to model taxiway operation process. Secondly, the controlled taxiing segment concept was proposed, and rules for generating corresponding sub-model were provided. And then, using cycles and cycle chains contained in the sub-model, the sufficient and necessary condition for head-on conflict-free operation of taxiway was provided. The corresponding avoidance control strategies and algorithm for head-on conflict control were proposed. Finally, the example demonstrated the effectiveness of the proposed algorithm.