Injection Characteristics of Palm Methyl Ester Blended with Diesel Using Zuech’s Chamber

A Study on the Injection Rate Characteristics of the Solenoid Common-Rail Injector Under Using a High-Pressure Fuel System

“…This reducing trend is similar to that demonstrated by Tomasz Knefel's study [31]. On the other hand, Prathan Srichhai et al [30] attributed that as the injection pressure rises with a high elasticity coefficient, the fuel compression capacity in the control chamber of the injector decreases, leading to speed up the needle closing process. In addition, according to Plamondon and Seers [35], high fuel viscosity will limit the probability of leaking because the needle will close faster through the return oil hole as the power signal is off.…”

“…Figure 6 displays the effect of injection pressure on the injection rate curve of diesel fuel with the injector energizing time (ET) kept at 1.5 ms, the back pressure (Po) of 45 bar and the injection pressure (P) varies from 400 bar to 1600 bar. The results show that the injection rate increases when increasing injection pressure owing to the higher flow capacity [30]. More specifically, at the injection pressure from 400 bar to 1200 bar, the average injection rate in the quasi-steady phase reached from 22.42 mg/ms to 49.35 mg/ms.…”

“…The injection quantity is affected by the properties of the fuel as well. In case fuel has a high viscosity, the pressure loss produced by friction in the pipeline must be considered in a reduction of the amount of fuel injected [30]. The measurement of fuel injection quantity has directly impacted the control of mixture equivalence ratio, which might timely intervene in emissions formation, improving power output and better fuel economy.…”