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Crdi ppt

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Crdi technology is more efficient and advance technology in the field of automobile engineering. This technology is using at a large scale by a number of car companies. In this presentation you will find the basic principle, working, and component description of crdi technology.

Publicada em: Engenharia
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Crdi ppt

  1. 1. A SEMINARA SEMINAR ONON CRDI SYSTEMCRDI SYSTEM Submit to Made bySubmit to Made by Rahul Sharma Sir Yogendra SinghRahul Sharma Sir Yogendra Singh
  2. 2. INDEXINDEX  IntroductionIntroduction  PrinciplePrinciple  WorkingWorking  HistoryHistory  FeaturesFeatures  Scope for further developmentScope for further development  AdvantagesAdvantages  ConclusionConclusion  ReferenceReference
  3. 3. IntroductionIntroduction  On diesel engines, it features a high-On diesel engines, it features a high-pressurepressure (over 1,000 (over 1,000 barbar), as opposed to a low-pressure), as opposed to a low-pressure fuel pumpfuel pump feedingfeeding unit injectorsunit injectors..  Third-generation common rail diesels nowThird-generation common rail diesels now feature piezoelectric injectors for increasedfeature piezoelectric injectors for increased precision, with fuel pressures up to 3,000 bar.precision, with fuel pressures up to 3,000 bar.  The Diesel engines have also undergone a seaThe Diesel engines have also undergone a sea change from the time Rudolf Diesel invented itchange from the time Rudolf Diesel invented it way back in 1892.way back in 1892.  Today Common Rail Direct Injection (CRDI) isToday Common Rail Direct Injection (CRDI) is
  4. 4. CRDI SystemCRDI System
  5. 5. PRINCIPLEPRINCIPLE  Unlike in conventional diesel engines, theUnlike in conventional diesel engines, the fuel is fed into the common tube or rail andfuel is fed into the common tube or rail and high pressure is maintained.high pressure is maintained.  This allows fuel to combine with air muchThis allows fuel to combine with air much more efficiently.more efficiently.  It features high-pressure fuel rail feedingIt features high-pressure fuel rail feeding individual solenoid valves as opposed toindividual solenoid valves as opposed to low-pressure fuel pump feeding injectors.low-pressure fuel pump feeding injectors.
  6. 6. CRDI with ECUCRDI with ECU
  7. 7. CRDI with ECUCRDI with ECU  Solenoid or piezoelectric valves make possible fineSolenoid or piezoelectric valves make possible fine electronic control over the fuel injection time andelectronic control over the fuel injection time and quantity.quantity.  Higher pressure that the common rail technologyHigher pressure that the common rail technology makes available provides better fuel atomisation.makes available provides better fuel atomisation.  To lower engine noise, the engine's electronic controlTo lower engine noise, the engine's electronic control unit can inject a small amount of diesel just before theunit can inject a small amount of diesel just before the main injection event ("pilot" injection).main injection event ("pilot" injection).  Reducing its explosiveness and vibration, as well asReducing its explosiveness and vibration, as well as optimising injection timing and quantity for variations inoptimising injection timing and quantity for variations in fuel quality, cold starting.fuel quality, cold starting.
  8. 8.  Direct injectorDirect injector  Spiral-shaped intake portSpiral-shaped intake port  Integrated portIntegrated port  Air flow meteringAir flow metering  Multiple Pilot injection and Post injectionMultiple Pilot injection and Post injection  Powerful MicrocomputerPowerful Microcomputer  Newly-developed catalytic convertersNewly-developed catalytic converters  Reduced noise levelsReduced noise levels FeaturesFeatures
  9. 9. Direct InjectorDirect Injector  The fuel injectors are typically ECU-controlledThe fuel injectors are typically ECU-controlled  A fuel injector is nothing but an electronically controlledA fuel injector is nothing but an electronically controlled valve.valve.  When the fuel injectors areWhen the fuel injectors are electrically activated, a hydraulicelectrically activated, a hydraulic valve (consisting of a nozzle andvalve (consisting of a nozzle and plunger) is mechanically orplunger) is mechanically or hydraulically opened and fuelhydraulically opened and fuel is sprayed into the cylinders at theis sprayed into the cylinders at the desired pressuredesired pressure
  10. 10. Spiral Shaped Intake PortSpiral Shaped Intake Port It provides –It provides –  Optimum swirlOptimum swirl  and even distributionand even distribution of fuel.of fuel.
  11. 11. Integrated PortIntegrated Port Integrated port is used for exhaust gasIntegrated port is used for exhaust gas recycling. There are three advantages torecycling. There are three advantages to this systemthis system • eliminates external pipes which areeliminates external pipes which are subject to vibrationsubject to vibration • quicker engine warm-upquicker engine warm-up • better combustion.better combustion.
  12. 12. Air Flow MeteringAir Flow Metering  It givesIt gives exact analysis of the air-mass thatexact analysis of the air-mass that is being taken in.is being taken in.  Due to this metering system, theDue to this metering system, the microcomputer that controls engine timingmicrocomputer that controls engine timing receives precise data.receives precise data.
  13. 13. Multiple Pilot Injection and PostMultiple Pilot Injection and Post InjectionInjection  Pilot injections is small doses of fuel madePilot injections is small doses of fuel made prior to the main injection which help toprior to the main injection which help to smoothen the sharp combustionsmoothen the sharp combustion character.character.  Post injection is a similarly small dose ofPost injection is a similarly small dose of fuel injected after the main injection tofuel injected after the main injection to reduce particulates.reduce particulates.
  14. 14. Powerful MicrocomputerPowerful Microcomputer  The microcomputer regulates the amountThe microcomputer regulates the amount of time the valves stay open and thus theof time the valves stay open and thus the amount of fuel injected, depending onamount of fuel injected, depending on operating conditions and how much outputoperating conditions and how much output is needed.is needed.
  15. 15. Newly Developed Catalytic ConvertersNewly Developed Catalytic Converters  Besides electronically-controlled exhaust-Besides electronically-controlled exhaust- gas recycling which contributes to lowergas recycling which contributes to lower nitrous oxidenitrous oxide emissions, CRDI engines areemissions, CRDI engines are equipped with catalytic converters nearequipped with catalytic converters near the motor and emission control devices onthe motor and emission control devices on the underbody. These vouch for a highthe underbody. These vouch for a high degree of efficiency.degree of efficiency.
  16. 16. Reduced Noise LevelReduced Noise Level  There is no mechanical device is using inThere is no mechanical device is using in this technology so the noise and vibrationthis technology so the noise and vibration produced byproduced by the system is comparatively low.the system is comparatively low.  The Electronic control and multipleThe Electronic control and multiple injections reduced noise to a great extent.injections reduced noise to a great extent.
  17. 17. Scope For Further DevelopmentScope For Further Development  Use of different fuels for zero emissions andUse of different fuels for zero emissions and better engine performancebetter engine performance  By using different fuels and cetane improvers,By using different fuels and cetane improvers, maximum torque can be obtainedmaximum torque can be obtained  Lowering the costLowering the cost  Closed-loop control injection with ion sensingClosed-loop control injection with ion sensing technologytechnology
  18. 18. AdvantagesAdvantages  More power is developedMore power is developed  Increased fuel efficiencyIncreased fuel efficiency  More stabilityMore stability  Pollutants are reducedPollutants are reduced  Particulates of exhaust are reducedParticulates of exhaust are reduced  Exhaust gas recirculation is enhancedExhaust gas recirculation is enhanced  Precise injection timing is obtainedPrecise injection timing is obtained  Pilot and post injection increase thePilot and post injection increase the combustion qualitycombustion quality  The powerful microcomputer makes theThe powerful microcomputer makes the whole system more perfectwhole system more perfect
  19. 19. Manufacturers of CRDI EnginesManufacturers of CRDI Engines  The car makers refer to their common railThe car makers refer to their common rail engines by their own brand names. Someengines by their own brand names. Some of them areof them are BMW's D-enginesBMW's D-engines Mahindra's CRDeMahindra's CRDe Tata's DICORTata's DICOR Honda's i-CTDiHonda's i-CTDi Hyundai-Kia's CRDi etcHyundai-Kia's CRDi etc
  20. 20. ConclusionConclusion CRDI technology revolutionized dieselCRDI technology revolutionized diesel engines. It has changed the way oneengines. It has changed the way one looks as diesel cars by providing thelooks as diesel cars by providing the above said advantages.above said advantages.
  21. 21. Thank YouThank You
  22. 22. A Power Point Presentation byA Power Point Presentation by Yogendra Singh ShekhawatYogendra Singh Shekhawat For more VisitFor more Visit www.studyhubz.comwww.studyhubz.com

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