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Due to the presence of fuel lines, the unit pump system can be classified as a variant of the P-L-N injection system.

These employ an electromagnetically operated spill valve for fuel control. With the introduction of electronics to diesel engines, electronic unit injector EUI and electronic unit pump EUP systems were developed. In one common mechanical system design, fuel control was typically achieved by rotation of the pumping element plunger in the same way as is done in P-L-N systems. Combining the pumping element and the injector into one assembly as in unit injector UI systems, allows these lines to be eliminated altogether.īoth the UI and UP systems are driven from the engine camshaft. Unit pump UP systems enable short high pressure fuel lines by locating the pump close to the injector. In unit injector UI and unit pump UP systems, each engine cylinder is served by a separate injection pumping element or injection pump in close proximity to the cylinder. Please log in to view the complete version of this paper. Electronic engine control unit for commercial vehicles

Full access requires DieselNet subscription. Subscribe to: Post Comments Atom.Revision This is a preview of the paper, limited to some initial content. Please suggest your Comment if any study materials you want. With neat sketch explain the working principles of variousTurbo chargers. With neat sketch explain about common rail direct injection system with its advantages and disadvantages. Explain about unit injector ssystem with advantages and disadvantages. Bts master creationsīriefly explain about rotary distributor injection system. Explain with neat sketch about an electronically controlled gasoline injection system for SI engines. Write about the emission norms for 4 wheelers. State the working principle of fuel injector. What are the functions of Turbo chargers? State the working principle of catalytic converter.

What are the important components of an electronic fuel injection system? What is CRDI? What are the difference between battery coil ignition and magneto ignition system? What are the advantages of electronic fuel injection system over conventional injection? Name the components of battery coil ignition system used in vehicle. This will be very useful for the examinations.