By H. Zhao
Direct injection permits special keep an eye on of the fuel/air blend in order that engines should be tuned for stronger strength and gasoline financial system. This needs to be balanced opposed to elevated gear expenses and emissions, offering ongoing learn demanding situations in bettering the expertise for advertisement functions. this significant booklet reports the technological know-how and expertise of alternative varieties of DI combustion engines and their fuels. 5 major sections offer an outline of the cutting-edge, masking gas DI engines; either light-duty and heavy-duty DI diesel engines; replacement fuels and aftertreatment units; and complicated modeling and experimental techniques.
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Extra resources for Advanced Direct Injection Combustion Engine Technologies and Development: Gasoline and Gas Engines, Volume 1
With spray-guided combustion systems and stratified charging, onto the market in 2006 and 2007. , 2006). 5 litre displacement volume, four-valve technology with two camshafts per cylinder bank, and piezo injectors with outward-opening nozzles (A-nozzles), positioned centrally in the cylinder head. The spark plug has been slightly displaced from the centre position in the direction of the exhaust valves, and tilted so that the electrodes are positioned at the edge of the injected fuel plume. Fuel is introduced to the combustion chamber using up to three individual fuel injection sequences at a pressure of up to 200 bar.
When compared to the swirl injector, the outward-opening nozzle (A-nozzle) has the distinct advantage of being able to produce a uniform hollow cone without generating a pre-spray. The spray angle is more or less unaffected by the back pressure in this case. Using this injector type in conjunction with a piezo control, it is possible to inject several times at extremely short intervals. Furthermore, using this type of control system, it is possible to control droplet size and injection mass separately, which makes it far superior to the conventional solenoid-actuated system.
11 Cylinder head BMW (source: BMW). strokes, in addition to multiple injection operations, possible. A three-cylinder axial-piston pump with integrated delivery control valve with a combined pressure and delivery control function compresses the fuel up to a maximum pressure of 200 bar. The fuel arrives at the injectors via short separate lines and a common rail with integrated pressure sensor. 1. The stratified charge range of an engine with gasoline direct injection and spray-guided combustion system is shown in Fig.