Methods and Results from the Development of a 2600 Bar Diesel Fuel Injection System

Optimization study on exhaust emissions and fuel consumption in a dimethyl ether (DME) fueled diesel engine

“…Furthermore, the NO x formation process during the diesel and DME combustion processes was predicted using a reduced gas research institute (GRI) NO mechanism [32] with the four species (N, NO, N 2 O, NO 2 ) and nine reactions. To predict soot emissions, the two-step phenomenological soot models [33] were applied in this study, including a Hiroyasu soot formation [34] and a Nagle-Strickland-Constable (NSC) oxidation model [35] were applied. In addition, HC and CO emissions can be predicted by the chemical kinetics mechanism of fuel oxidation.…”

Potential for Improving HD Diesel Truck Engine Fuel Consumption Using Exhaust Heat Recovery Techniques

“…The fuel injection system is of great importance for the operation of the diesel engine [3,9,10]. In the present work, the injection rate has been obtained from the following relation:…”

Fluid damping clearance in a control valve of injector

“…According to the design experiences, the fluid thickness between the poppet and the valve guide ranges from 0.08 mm at valve full open to 0.02 mm at valve full closed. The fluid thickness between the poppet and the solenoid ranges from 0.04 mm at valve full open to 0.1 mm at full closed [1][2][3][4][5]. …”

“…With the enhancement of the fuel pressure in the common rail system, the opening and closing properties of a control valve increasingly influence the performance of an injector, however, the bouncing value when the control valve closes is the one of most important factors that determined the injector close delay [1][2][3]. There are two ways to decrease the bouncing value: one is to reduce the quality of the poppet, and decrease the momentum, finally minish the bouncing height; the other is to optimize the damping clearance in the control valve, finally reduce the bouncing height.…”