MPFi V/S CRDi. V/S. in petrol engine for gaining more uniform Air Fuel blending fuel is injected at various point in the path of air. but in case of DTSI(digital twin. Know everything about Multi Point Fuel Injection (MPFI) system on CarTrade Blog. Fi EFi MPFi GDi. EFi stands for Electronic Fuel injection (EFi) whereas MPFi or MPi stands for Read more: How CRDi technology works?>>.

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In common-rail system; the fuel pressure is implemented by a very strong pump instead of fuel injectors. Abstract Common-rail technology is intended to improve the pulverization process. It is connected to the injection nozzles injectors at the end of which are rapid solenoid valves to take care of the timing and amount of the injection.

The powerful microcomputer makes the whole system more perfect and doubles vrdi torque at lower engine speeds. This site uses Akismet to reduce spam. The common rail upstream of the cylinders acts as an accumulator, distributing the fuel to the injectors at a constant pressure of up to bar. In the CRDI system developed jointly by Mercedes-Benz and Bosch, the electronic engine management system continually adjusts the peak fuel pressure according to engine speed and throttle position.

Learn how your comment data is processed. To improve pulverization, the fuel must be injected at a very high pressure, so high that normal fuel injectors cannot achieve it. In other words, pressure generation and fuel injection are independent of each other. This technique allows fuel to be crdii as needed, saving fuel and lowering emissions.

The high-pressure injectors are available with different nozzles for different spray configurations. There is no glow plug since the injection pressure is high. In short, “post-combustion” ccrdi pollutants. More accurately measured and timed mixture spray in the combustion chamber significantly reducing unburned fuel gives CRDI the potential to meet future emission guidelines such as Euro V.

Newer CRDI engines feature maximum pressures of bar.

Working of MPFI vs CRDI Engines – Dummies Guide

The system realizes high output and torque, superb fuel economy, emissions low enough to achieve Euro Stage IV designation and anx levels the same as a gasoline engines. When the timing shuts the solenoid valves, fuel injection ends immediately. Expensive to maintain in case of repairs.


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By using this system there is reduction of noise and Pollutants. As a result, not only pulverization is improved by the higher fuel pressure, but the duration of fuel injection can be shortened and the timing can be more precisely controlled. They lead to dark smoke and smog which is very crucial to air quality of urban area, if not to the ecology system of our planet. Common-rail technology is intended to improve the pulverization process. Particulates of exhaust are reduced. Sorry, your blog cannot share posts by email.

CRDI principle not only lowers fuel consumption and emissions possible; it also offers improved comfort and is quieter than modern pre- combustion engines. A major drawback if Crci have to pinpoint one is if the distributor fuel rail fails, the engine comes to a grounding halt which is in turn overcome by a new technology in place called unit injectors, which intakes fuel from the high pressure fuel pump and has the distinct advantage of operating even when one or two unit injectors fail.

The electronic control unit ECU modifies injection pressure precisely and as needed, based on data obtained from sensors on the cam and crankshafts. This division of labor necessitates a special chamber to maintain the high injection pressure of up to 1, bar. Leave a Reply Cancel reply Your email address will not be published. Uniform air-fuel mixture and higher fuel efficiency. Conventional ans Mechanical indirect injection engines are very sluggish and noisy to operate, in which the pump pressure forces the injectors to open to spray the fuel and hence abnormal spray abd resulting in rich black smoke from the exhaust.

EFi vs MPFi vs GDi: How Electronic Fuel Injection Technology Works? – CarBikeTech

Particle emission is always the biggest problem of diesel engines. The process is called regeneration. CRDI — many must have come across seeing it behind cars boot and wondering what is it.


It also brings a significant reduction in the noise and vibrations crvi conventional diesel engines. MPFI came into play as a means to meet emission norms set by various countries and in addition it also helps in deriving out good vehicle performance and minimum quantity of fuel. The PF unit needs to be cleaned up every 80, km by high-pressure water, to get rid of the deposits m;fi from the additive.

Conventional direct injection diesel engines must repeatedly generate fuel pressure for each injection. These days, even cc powered engine bikes are equipped with fuel injectors for improving performance and fuel efficiency but with increase in cost. Fuel rail is an accumulator which stores the high pressure fuel and releases it to the injector nozzle based on inputs from ECU. Remember me on this computer.

Notify me of new posts by email. More pulverization of fuel is obtained in this system. Skip to main content. Common Rail Direct Injection Features: However, the main problem is: Drawback of MPFI over carburetor is. This further eliminates the m;fi particles and also increases the exhaust flow temperature thus reducing the pre-heat time of the catalytic converter.

The microcomputer regulates the amount of time the valves stay open and thus the amount of fuel injected, depending on operating conditions and how much output is needed. The new common-rail injection technology helps solving this problem. Your email address will not be published. The liquid-state additive is store in a small tank and added to the fuel by pump.

Enter the email address you signed up with and we’ll email you a reset link. Common rail refers to the single fuel injection line on the CRDI engines. By its high- pressure, precise injection during a very short period, the common-rail system can introduce a “post- combustion” by injecting small amount of fuel during expansion phase.