common rail diesel fuel injection system pdf

2. Type of injection Timing Amount injected Number of injections DPC Mechanically set Mechanically set 1 parison between the computed and the measured fuel injection parameters, showed good agreement.

The Common Rail System is modular in design. These systems where well known in a particular type of engine famously called the “Doxford” engines or opposed piston engines.

injection systems, the common rail system provides a flexibility of operation that enables in jection flow, timing advance, rate of introduction and injection pressure to be accurately adjusted to engine requirements for all operating conditions. The common rail system of fuel injection was used in marine diesel engines during the early and mid-19th century.

Modern diesel common-rail injection systems supply fuel from a high-pressure vessel.

Common rail is a fuel injection system found in modern diesel engines. ‘Common Rail Direct Injection’ is a type of advanced technology used in engine fuel systems. In Common Rail Direct Injection, commencement of combustion takes place directly into the main combustion chamber located in a cavity on the top of the piston crown. An investigation was conducted on a 0.42 liter single cylinder diesel engine equipped with a common rail fuel injection system to evaluate the influence of the swirl motion on JP-8 fuel combustion. Common rail systems provide a level of flexibility which can be exploited for class leading emission control, power and fuel consumption. The term ‘CRDi’ is most commonly referred to diesel engines. Introduction. It stores the compressed fuel …

The high-pressure rail gives its name to the common-rail system and binds the pump and injectors together as the central hydraulic component. In practice, many modern common rail injection systems will use both a pressure control valve on the rail and one of the forms of high pressure pump metering to control rail pressure.

Figure 8 shows one example from an engine equipped with both a PCV and a FMV [2521] .

The injection event causes an instantaneous drop in the rail pressure, as the stored mass is diminished. The fuel is constantly available at the pressure required for injection. The right combination of high-pressure pump, injectors, rail and electronic control unit results in systems for all types of engine.