Assessment of influence of the Common Rail system high-pressure fuel pump design on regularity of fuel supply to a fuel accumulator

BACKGROUND: At the present time all worldwide diesel engine manufacturers have directed their development strategies on way of reduction harmful emissions, fuel efficiency improving and increasing power per liter. Using only accumulator type system is not sufficient for goals achievement. It necessary to use new auxiliary units, such as an exhaust catalyst, recirculation system, injection additional liquids together with fuel, well improve existing units. Increasing accuracy rate a nozzle will make it possible adjust more precisely, that positive effect directions engineering. Injection dependent pressure in inlet control signal timing. Pressure pulsation stable timing cause irregularity nozzle. Possibility decreasing mainly defined by design high-pressure pump, supplies partially. The optimization increase rate, engines promising areas.
 AIMS: Study supply pumps various designs Common Rail accumulation aimed decrease oscillations stability nozzle.
 METHODS: In order assess pump designs, these were simulated specialised software. Theoretical studies carried out.
 RESULTS: Graphs non-uniformity depending are obtained.
 CONCLUSIONS: Based simulations, conclusions about influence made, recommendations given.