GreenBooks

CAI combustion in a 4-stroke Spark Ignition Direct Injection Engine



PDF, ebook, epub (ePub, fb2, mobi)

A single cylinder, air-assisted gasoline direct injection engine was used to investigate the factors affecting CAI combustion. CAI was achieved by residual gas trapping using low-lift short duration camshafts and early closing of the exhaust valves. The effects of EVC (Exhaust Valve Closure) and IVO (Inlet Valve opening) timings, spark timing, single and split injection timings, coolant temperature, compression ratio, cam lift and duration on emissions and CAI operation were investigated experimentally. Results show that EVC timing, compression ratio, cam lift and duration had significant influence on CAI combustion and emissions. Coolant temperature was revealed to have substantial impact on CAI combustion at coolant temperature below 65 degrees. Results also showed the importance of injection timing and especially split injection that enabled the extension of CAI range in both stoichiometric and lean conditions. Furthermore, CAI operation range was extended via fuel injection during recompression. All the above clearly suggest that optimising injection timing and using split injection is an effective way to control and extend CAI operation in a direct injection gasoline engine.






A single cylinder, air-assisted gasoline direct injection engine was used to investigate the factors affecting CAI combustion. CAI was achieved by residual gas trapping using low-lift short duration camshafts and early closing of the exhaust valves. The effects of EVC (Exhaust Valve Closure) and IVO (Inlet Valve opening) timings, spark timing, single and split injection timings, coolant temperature, compression ratio, cam lift and duration on emissions and CAI operation were investigated experimentally. Results show that EVC timing, compression ratio, cam lift and duration had significant influence on CAI combustion and emissions. Coolant temperature was revealed to have substantial impact on CAI combustion at coolant temperature below 65 degrees. Results also showed the importance of injection timing and especially split injection that enabled the extension of CAI range in both stoichiometric and lean conditions. Furthermore, CAI operation range was extended via fuel injection during recompression. All the above clearly suggest that optimising injection timing and using split injection is an effective way to control and extend CAI operation in a direct injection gasoline engine.


and can switch back to conventional spark ignition operation when necessary. SPARK IGNITION. Keywords Four stroke Gasoline Direct injection Spark ignition Engine ECU. by X Li Cited by 2 Poppetvalve twostroke gasoline engines can increase specific power of . Experimental Studies on Controlled Autoignition CAI Combustion of Gasoline in a 4Stroke. Cycles of Spark Ignition and Controlled AutoIgnition Combustion .


Direct Injection

AbstractControlled autoignition CAI combustion also known as . DI Direct Injection. Gasoline direct injection GDI engines have widely penetrated the United States . A directinjection sparkignition fourstroke internalcombustion engine comprising a combustion chamber including a piston a cylinder with a cylinder head an intake pipe an intake valve for controlling flow from said intake pipe into said cylinder an exhaust pipe an exhaust valve for controlling flow from said cylinder into said exhaust pipe a first ignition means positioned close to said intake valve and a . In order to minimise the air shortcircuiting rate the intake and exhaust valve timings were varied and optimised. Effects of injection and ignition timing of a large direct injection spark ignition engine fuelled with a hydrogenCNG mixture on its operating The simulations were performed in a KIVA3Vsoftware which is intended to carry out a 3D simulations of engines processes. investigation on DME assisted gasoline CAIHCCI combustion with . Various intake pressures were applied ranging from atmospheric aspiration to The main advantage of controlled autoignition CAI combustion systems versus spark ignition and Diesel engines is substantial reduction of. In this paper the 24 stroke switchable single cylinder direct injection gasoline engine and its instrumentation will be presented. Direct Injection 4Stroke Single Cylinder Engine System P. Scientific Contact Alessio Dulbecco. Read chapter 4 SparkIgnition Gasoline Engines Various combinations of commercially available Variable mixturemotion devices which may throttle one inlet port in a fourvalve engine to increase The most recent development of direct injection spark ignition DISI also known as GDI systems. spark ignition SI and Controlled Autoignition CAI combustion in both .


Książki na forum PDF CAI combustion in a 4-stroke Spark Ignition Direct Injection Engine PDF. Elektroniczna baza książek cz .



GreenBooks Links


Contact Email