development of maruti suzuki cng/lpg bifuel vehicle in india
TRANSCRIPT
(16)
1. ç·èš
ãã€ã³ãã§ã¯ 2000 幎以éïŒç°å¢ä¿è·ã®ãã倩ç¶ã¬ã¹ (CNG) ã¿ã¯ã·ãŒåã³ãã¹ãæ®åããŠããŠããïŒãŸãäœã³ã¹ãçæãšãã£ã芳ç¹ããä¹çšè»ã«ãããŠã CNG ããã³ LPG è»ãæ®åããŠããŠããïŒãã¹ãºãã®ã€ã³ãã«ãããèªåè»çç£åäŒç€Ÿã§ãããã«ãã¹ãºãã§ã¯ïŒãããŸã§ãããµãŒã¿ã€ãã®ããããåãä»ãã CNG ããã³ LPG è»ã販売ããŠããŠãããïŒ2010 幎 8 æã«ç¬èªéçºã®ã€ã³ãžã§ã¯ã·ã§ã³ã·ã¹ãã ãåãããã€ãã¥ãšã« CNG è» 5 æ©çš®ãçºè¡šãïŒåªããçæã³ã¹ããšç°å¢æ§èœïŒèµ°è¡æ§èœïŒå®å šæ§ã調åãã CNG è»ãã€ã³ãåžå Žã«æå ¥ããïŒãŸã 2011 幎 2 æã«ã¯å ±éã®ã·ã¹ãã ã«ãã LPG è»ãã©ã€ã³ãããã«å ãããªãšãŒã·ã§ã³ã®å å®ãå³ã£ãŠããŠããïŒä»åã€ã³ãã«ããã CNG ããã³ LPG è»ãåãå·»ãç¶æ³ãšïŒã¹ãºããšãã«ãã¹ãºãã«ãŠå ±åéçºãã CNGïŒLPG è»ã«æèŒããŠãããã€ãã¥ãšã«ã·ã¹ãã ïŒãšã³ãžã³åºåããã³ææ°ã¬ã¹æ§èœãªã©ã«ã€ããŠçŽ¹ä»ããïŒ
2. ã€ã³ãã® CNG è»æ®åç¶æ³
ãå³ 1 ã«äžçã® CNG è»ã®æ®åå°æ°ç¶æ³ãïŒå³ 2 ã« CNG è»ã®æ®åçã瀺ãïŒã€ã³ãã¯ããã¹ã¿ã³ïŒã€ã©ã³ïŒã¢ã«ãŒã³ãã³ïŒãã©ãžã«ã«æ¬¡ãã§äžç㧠5 çªç®ã®æ®åå°æ°ã§ããïŒ
* Corresponding author. E-mail: [email protected]
æ¥æ¬ççŒåŠäŒèªã第 54å·» 168å·ïŒ2012幎ïŒ76-81 Journal of the Combustion Society of JapanVol.54 No.168 (2012) 76-81
â ç¹éïŒFEATUREâ
âè² è·å€åã»çææ§ç¶å€åã»ç°å¢èŠå¶ã«å¿ããããã®ççŒæ©é¢çæäŸçµŠè£ 眮ãšãã®å¶åŸ¡ïŒ Fuel Supply and Control System of Combustion Engine for Load Change, Flex Fuel and Environment Regulation â
ã€ã³ã ãã«ãã¹ãºã CNG/LPG Bifuel è»ã®éçºDevelopment of Maruti Suzuki CNG/LPG Bifuel Vehicle in India
ç°äžãå°ç§*
TANAKA, Masahide*
ã¹ãºã (æ ª)ãã432-8611 æµæŸåžååºé«å¡çº 300Suzuki Motor Corp. 300 Takatsuka-Cho, Minami-Ku, Hamamatsu City, 432-8611 Japan
Abstract : Maruti Suzuki developed CNG /LPG Bifuel vehicle that has cost effective, good performance, high reliability system with sophisticate multi-point gas injection technologies. Optimized engine setting show comparable engine power in CNG and LPG operation compared with petrol operation. Using with same emission system with base petrol vehicle, BS4 emission standard was achieved in each fuel operation by adjusting dedicated ECU software.
Key Words : Alternative fuel, Natural gas, Liquefied petroleum gas, Bifuel, India
å³ 1ãäžçã® CNG è»æ®åç¶æ³
å³ 2ãäžçã® CNG è»æ®åç
ç°äžå°ç§ïŒã€ã³ã ãã«ãã¹ãºã CNG/LPG Bifuel è»ã®éçº
(17)
2010 幎ã®éèšå€ã§ã¯ 108 äžå°ãšãªã£ãŠããïŒããããªããïŒæ®åçãšããŠã¯ 17 äœã§ããäœäœãšãªã£ãŠããïŒããã§æ®åçãšã¯å šè»äž¡ã«å¯Ÿãã CNG è»ã®å²åã瀺ãïŒãå³ 3 ã¯ã€ã³ãã«ãããè¿å¹Žã® CNG è»ã®æ®åå°æ°æšç§»ã瀺ãïŒ4 幎éã§çŽ 3 åãšçå®ã«å°æ°ãå¢å ããŠããŠããïŒçµæžçºå±ã«äŒŽãèªåè»ä¿æå°æ°ã®å¢å ãšå ±ã«ä»åŸã® CNG è»æ®åæ¡å€§ã®ããã³ã·ã£ã«ãæã£ãŠãããšèããŠããïŒãå³ 4 ã«ã€ã³ãã® CNG è»ã®æ§ææ¯ã瀺ãïŒåæ°åŒ·ããªãŒããªãã·ã£ãšåŒã°ãã 3 茪ã¿ã¯ã·ãŒã§ 4 å²ãä¹çšè»ïŒæ®ãã® 1 å²ããã¹ïŒåçšè»ãªã©ã§ããïŒ
3. ã€ã³ãã® CNG å ãŠãã€ã³ãã©æŽåç¶æ³
ãçŸåšã€ã³ãã§ã¯å³ 5 ã«ç€ºãããã«è¥¿éšã®ã ã³ãã€ããåéšã®ããªãŒåšèŸºãçµã¶ãšãªã¢ã«å€©ç¶ã¬ã¹ã®ãã€ãã©ã€ã³ãçºéããŠããïŒå³ 5 äžã®ç¹ç·åã³ç Žç·ã§ç€ºãããã«ä»åŸåéšåã³æ±éšæ¹é¢ãžã®ãã€ãã©ã€ã³ã®äŒžé·ãèšç»ãããŠããïŒãCNG ã®å ãŠãã¹ã¿ã³ãããã€ãã©ã€ã³ã®æ·èšãããŠãããšãªã¢ã«åºãã£ãŠããïŒããã 600 ã® CNG ã¹ã¿ã³ãã 20 éœåžïŒ40 ã»ã©ã®çºã«æ®åããŠãã (å³ 6)ïŒä»åŸã®ãã€ãã©ã€ã³ã®å»¶é·ãšå ±ã«ã€ã³ãæ±éšãªãã³ã«åéšã®å°åã§ã® CNG ã¹ã¿ã³ãã®æ®åãèŠèŸŒãŸããïŒãè¡š 1 ã«ã€ã³ãåå·ã® CNG ã¹ã¿ã³ãã®æ®åå²åã瀺ãïŒæãæ®åããŠããããªãŒã§ã¯å šã¹ã¿ã³ãã®ãã¡ã® 1/3 ã»ã©ã CNG ã¹ã¿ã³ããããïŒæ¬¡ãã§ã ã³ãã€ãäžå¿ãšãã西éšã®ãããŒã©ãŒã·ã¥ãã©å·ãšãã®åé£ã«ããã°ãžã£ã©ãŒãå·ã§ CNG ã¹ã¿ã³ããæ®åããŠããïŒæ®ãã® CNG ã¹ã¿ã³ãã®ãã 5 å·ã§ã¯ãŸã æ®åçã 1 % ã«ãéããŠããªãïŒ
77
å³ 3ãã€ã³ãã® CNG è»å¢å (2006â2010)
å³ 4ãã€ã³ãã® CNG è»ã®æ§ææ¯ (åºå žïŒEAI)
å³ 5ãã€ã³ãã®å€©ç¶ã¬ã¹ãã€ãã©ã€ã³
æ¥æ¬ççŒåŠäŒèªã第 54å·» 168å·ïŒ2012幎ïŒ
(18)
4. ã€ã³ãã® CNG/LPG è»äºæ
ãCNG è»ã®æ®åå°æ°ã®å€ãä»åœåæ§ïŒã€ã³ãã® CNG è»ãã¢ãã¿ãŒããŒã±ããã§è£ çãããããããã¬ãããã£ããè»ã倧å€æ°ãå ããŠããïŒã¬ãœãªã³è»ã CNG è»ã«æ¹é ããçç±ã¯ CNG ã®ã©ã³ãã³ã°ã³ã¹ããå®ãããã§ããïŒãã€ã³ãã§ã¯å³ 7 ã«ç€ºãæ§ã«ã¬ãœãªã³ïŒLPGïŒè»œæ²¹ïŒCNG ã®é ã«èµ°è¡è·é¢ãããã®çæè²»ãå®ããªã£ãŠããïŒã¡ãŒã«ãŒçç£ OEM è»ãã€ã³ãã®ãããªã¬ãããã£ããè»ãæ®åããŠããåœã§åãå ¥ããããã«ã¯åžè²©ã®ããããšäŸ¡æ Œç«¶äºåãæããªããã°ãªããªãïŒåžè²©ã®ã¬ãããã£ããçš CNG ãããã¯ãã£ãŒã©ãŒè£ çã®ãã®ãå«ããŠå€ããã¬ã¹ãããµãŒã¿ã€ãã®çæã·ã¹ãã ãçšããŠããïŒãããµãŒã·ã¹ãã ã¯ïŒäŸ¡æ Œãå®ãåé¢å¹Žã 匷åãããŠããæã¬ã¹èŠå¶ã«å¯Ÿå¿ããŠããã«ã¯é床ãããïŒãã®ããïŒåžè²©ã®ãããã«ãããŠãæè¿ã¯ã€ã³ãžã§ã¯ã·ã§ã³ã¿ã€ãã®ãã®ãåŸã ã«å¢ããŠããŠããïŒ
5. ãã«ãã¹ãºãã® CNG/LPG ãã€ãã¥ãšã«è»éçº
5.1. æ©çš®åã³è²©å£²ãšãªã¢ã2011 幎 8 æã«ãã«ãã¹ãºãã¯ææ°ã®ç°å¢æ§èœãšåªããèµ°è¡æ§èœåã³å®å šæ§ãæã¡ïŒãªããã€åžè²©ã®ããããšäŸ¡æ Œç«¶äºåã®ããã€ã³ãžã§ã¯ã·ã§ã³ã·ã¹ãã ïŒi-GPI (ã€ã³ããªãžã§ã³ã ã¬ã¹ ããŒãã€ã³ãžã§ã¯ã·ã§ã³) CNG è»ãéçºãã€ã³ãåžå Žã«æå ¥ããïŒãŸãç¿å¹Ž 2011 幎 2 æã«ã¯ CNG è»ãšå ±éã®åºæ¬ã·ã¹ãã ãçšãã LPG è»ãæå ¥ããïŒãçŸåšãã«ãã¹ãºãã§ã¯ã€ã³ãåœå ã« 5 æ©çš®ã® CNG è» (å³ 8) ãš 3 æ©çš®ã® LPG è»ã販売ããŠããïŒCNG è»ã®è²©å£²ã¯ CNG ã¹ã¿ã³ãã®æ®åãé²ãã éœåžéšã«éå®ããŠãããïŒLPG è»ã¯ LPG ã¹ã¿ã³ããã€ã³ãåœå ã«åºãååžããŠããããïŒåºç¯å²ã§è²©å£²ãããŠããïŒããããã¬ãœãªã³ãš CNG/LPG ã䜵çšãããã€ãã¥ãšã«è»ã§ããïŒãã«ãã¹ãºãã® CNG/LPG è»ã®åªäœæ§ã¯æå 端ã®ã¬ã¹ã€ã³ãžã§ã¯ã·ã§ã³ã·ã¹ãã ãæ¡çšããªããã¬ãããã£ããæ¹é è²»çšäžŠã¿ã®äŸ¡æ ŒãéæããŠããç¹ã«ãããšãããïŒ
5.2. ãã€ãã¥ãšã«ã·ã¹ãã ãCNG ã·ã¹ãã ã¯ããŒã¹ãšãªãã¬ãœãªã³è»ã®ã¬ã€ã¢ãŠã段éãã CNG éšåã®ã¬ã€ã¢ãŠããèæ ®ããŠèšèšããŠããããïŒæ¹é ããããªã©ã«èŒã¹æé©ã¬ã€ã¢ãŠããããããšã
å³ 6ãã€ã³ãã®äž»ãª CNG ã¹ã¿ã³ãæ®åéœåž
è¡š 1ãã€ã³ãåå·ã® CNG ã¹ã¿ã³ãæ®åå²å (åºå žïŒMOPNG Websites)
å³ 7ãã€ã³ãã«ãããçæå¥ã©ã³ãã³ã°ã³ã¹ãæ¯èŒ (ãã«ãã¹ãºããŸãšã)
å³ 8ããã«ãã¹ãºãããã€ãã¥ãšã« CNG è»
78
ç°äžå°ç§ïŒã€ã³ã ãã«ãã¹ãºã CNG/LPG Bifuel è»ã®éçº
(19)
79
å¯èœãšãªã£ãŠãã (å³ 9)ïŒãšã³ãžã³ãžçææ··åæ°ãå°å ¥ããã€ã³ããŒã¯ããããŒã«ãã«ã¯åæ°çãžåŽå°ã¬ã¹ãå°å ¥ããããã®ããºã«ãåããå°çšåãèšãïŒã¬ã¹çæé 管åã³ã¬ã¹ã€ã³ãžã§ã¯ã¿ãªã©ã®ã¬ã€ã¢ãŠããçµä»ãæ§ã¯ãã¡ããè¡çªå®å šæ§ãèæ ®ããã¬ã€ã¢ãŠããšãªã£ãŠããïŒãä»åïŒæ°ãã«éçºãã CNG ã·ã¹ãã ã¯ïŒã·ã¹ãã å šäœ
ãã³ã³ãããŒã«ããããã¹ãºã/ãã«ãã§èªç€Ÿéçºããå°çšã®ã¬ã¹ã³ã³ãããŒã© (ECU) ã䜿çšããŠãã (å³ 9, 10, 11)ïŒãã®ã¬ã¹ã³ã³ãããŒã©ãšããŒã¹ãšã³ãžã³ã³ã³ãããŒã©ãçžäºã«å調ãïŒã€ã³ãã® CNG æ§ç¶ (è¡š 2) ã«åãããæé©ãª CNG åŽå°éïŒç¹ç«ææãªãã³ã«äž»æ¢åŒãªã©ã®è£æ©éšåã®å¶åŸ¡ïŒçæåæ¿ãå«ãã CNG ãšã³ãžã³ã®å¶åŸ¡ãè¡ãªã£ãŠããïŒãLPG ã·ã¹ãã ã®åºæ¬æ§æ㯠CNG ãšå ±éã§ããïŒçæã¿ã³ã¯ïŒçææ®éã»ã³ãµïŒã€ã³ãžã§ã¯ã¿åŽå°å§ã®éããªã©ããããèšå®ã®éãã«å¯ŸããŠå¶åŸ¡äžã®ä¿®æ£ãå ããããŠãããïŒã¬ã¹åŽå°ã«ããããå¶åŸ¡ã¯å ±éãšãªã£ãŠããïŒãè¡š 2 ã«ç€ºãããã€ã³ãã® CNG ã®æ§ç¶ã«ã€ããŠã¯æ¥æ¬ã§éœåžã¬ã¹ãšããŠäŸçµŠãããŠãã 13A ã«å¯ŸãïŒãšã¿ã³ïŒãã¿ã³ïŒãããã³ãªã©ã®ã«ãŒãã³æ°ã®å€ãçåæ°ŽçŽ ãå°ãªãããšãšïŒCO2 ãªã©ã®äžçã¬ã¹åãå€ãããšããçºç±éãçŽ 1 å²äœããªã£ãŠããïŒçµæçã«ã¬ã¹ã®åŽå°éæ¯ã§ 7 % ã»ã©ã®å¢éãå¿ èŠã«ãªã£ãŠããïŒ
5.3. ãã€ãã¥ãšã«åã«äŒŽãã¬ãœãªã³è»ãšã®ãã®ä»ã®å·®ç°ãCNG åã«äŒŽããã®ä»ã®ç¹åŸŽãšããŠïŒãšã³ãžã³ã«ãããŠã¯ãã«ãåã³ãã«ãã·ãŒãæ質ãªã©ãããŒã¹ã®ã¬ãœãªã³ãšã³ãžã³ããå€æŽãèä¹ æ§ã確ä¿ããŠããïŒãµã¹ãã³ã·ã§ã³ã¯ CNG ã·ãªã³ãæèŒã«ããééã¢ãããªãã³ã«ééãã©ã³ã¹å€åã«å¯Ÿå¿ããã¥ãŒãã³ã°ãè¡ãªã£ãŠããïŒè»äœã«ã€ããŠã CNG ã·ãªã³ãæèŒã«äŒŽãééã¢ãããšè¡çªå®å šæ§ã確ä¿ããããè£åŒ·æ¿ãè¿œå ãããªã©ããŒã¹ã¬ãœãªã³è»ããæ¹è¯ãå ããå°çšèšèšãšããŠããïŒããã«ã¬ã¹ãå ãŠãããã¬ã»ãã¿ã¯ã«ã¯çµŠæ²¹ãªããå ã®ã¬ãœãªã³çµŠæ²¹å£ã®é£ã«é 眮ãå©äŸ¿æ§ã確ä¿ããŠããïŒ
5.4. çç£äžã®ç¹åŸŽããã«ãã¹ãºãã® CNG/LPG è»ã¯å·¥å Žã§ã®çç£ã«ãããŠã¯ã¬ãœãªã³è»ãšåäžã®çç£ã©ã€ã³ã§çµç«ãŠãè¡ã£ãŠããïŒãŸãçç£ã©ã€ã³å·¥çšäžã§çæé«å§é 管ã®ãªãŒã¯ãã§ãã¯ãè¡ãïŒãã®åŸå®æè»æ€æ»å·¥çšã«ãŠè»äž¡ããŒã¿ã«ã§æçµçãª
å³ 9ããã€ãã¥ãšã« CNG ã·ã¹ãã ã¬ã€ã¢ãŠã
å³ 10ããã€ãã¥ãšã« CNG ã·ã¹ãã å³
å³ 11ããã€ãã¥ãšã« LPG ã·ã¹ãã å³
è¡š 2ãã€ã³ãã®ä»£è¡šç CNG æ§ç¶ (vol%)
æ¥æ¬ççŒåŠäŒèªã第 54å·» 168å·ïŒ2012幎ïŒ
(20)
ãªãŒã¯ãã§ãã¯ãè¡ã£ãŠããïŒå ããŠã·ã¹ãã åäœãªãã³ã«æã¬ã¹ãã§ãã¯ãèªåæ€æ»æ©åšã§è¡ãïŒã¬ãœãªã³è»ãšåäžã®é«ã補é å質ã確ä¿ããŠããïŒOEM çç£ã®ã¡ãªãããšãªã£ãŠããïŒ
6. ã¬ã¹ã€ã³ãžã§ã¯ã¿æèŒäœçœ®ã«ããæ§èœãžã®åœ±é¿
ããã€ãã¥ãšã«è»ã§ã¯ã¬ãœãªã³ãšã¬ã¹åã ã®çæãåå¥ã«ãšã³ãžã³ã«äŸçµŠããå¿ èŠãããïŒç¹ã«ããŒãåŽå°ã®å ŽåïŒã¬ãœãªã³ã€ã³ãžã§ã¯ã¿ã®åä»äœçœ®ã¯ããŒãå ãžã®ã¬ãœãªã³åŽé§ã®å£é¢ä»çãäœæžããããã«åªå çã«ã€ã³ããŒã¯ããŒãã«è¿ãäœçœ®ã«ã¬ã€ã¢ãŠãããå¿ èŠãããïŒãã®çµæïŒã¬ã¹ã€ã³ãžã§ã¯ã¿ã¯ã¬ãœãªã³ã€ã³ãžã§ã¯ã¿åšèŸºéšåãšã®ã¯ãªã¢ã©ã³ã¹ã確ä¿ããããã€ã³ããŒã¯ããŒãããé¢ããäœçœ®ã«ã¬ã€ã¢ãŠãããããåŸãªããªãïŒå¹žãã«ããŠã¬ã¹ã®å Žåã¯æ¶²äœçæã®ããã«å£é¢ä»çãªã©ã®åœ±é¿ã¯ãªãããåŽå°ããºã«ã®æ¹åã«èªç±åºŠã¯æãŠããïŒã€ã³ããŒã¯ããŒãåã³ã€ã³ããŒã¯ãããã©ãŒã«ããžã®å°å ¥é·ãé·ããªããšã¬ã¹ãã³ã¹ã®æªåãªã©ãæãæããããïŒãä»åã¬ã¹ã€ã³ãžã§ã¯ã¿ã®ã¬ã€ã¢ãŠãæ€èšãããéã«ã¬ã¹ã€ã³ãžã§ã¯ã¿ãšã€ã³ããŒã¯ãããã©ãŒã«ããç¹ãã¬ã¹ããŒã¹é· (å³ 12) ã®ãšã³ãžã³æ§èœã«äžãã圱é¿ã調æ»ããçµæããããã玹ä»ããïŒãè¡š 3 ã®â ïœâ€ã¯åæ°çã®ã¬ã¹ã€ã³ãžã§ã¯ã¿ãšã€ã³ããŒã¯
ãããã©ãŒã«ãã®ã¬ã¹ããºã«éã®ããŒã¹é·ïŒ5 çš®é¡ã®çµåãã瀺ãïŒãå éæã®ç©ºçæ¯æåïŒãã©ã€ãããªãã£ïŒã¬ãœãªã³âCNG éã§çæãåãæ¿ãããšãã®ãã£ãŒãªã³ã°ïŒå§åæ§ã«ã€ããŠæ¯èŒãããšããïŒããŒã¹é·ãé·ãå Žåãšåæ°çã®ããŒã¹é·ã®å·®ã倧ããæã«å§åæ§ãæªåããåŸåãèŠãããïŒããã®çµæããïŒå¯èœãªç¯å²ã§ããŒã¹é·ã®æ°çéå·®ãå°ããããããšãšããŒã¹é·ãçãããããšãæå¹ã§ããããšïŒç¹ã«â¡ãšâ¢ïŒâ£ãšâ€ã®æ¯èŒããæ°çéå·®ãå°ããããããšãããæå©ã§ããããšãåãã£ãïŒ
7. ã¬ã¹çæãšã³ãžã³æ§èœ
ãã¬ãœãªã³ãšã³ãžã³ã«å¯Ÿãã¬ã¹çæãšã³ãžã³ã§ã¯å ãŠãå¹çãäœäžããããäžè¬ã«åºåãäœäžããŠããŸãïŒç¹ã« CNG ã¯ã¬ã¹æ¯éãå°ããããã«å ãŠãå¹çäœäžã倧ããïŒçµæåºåäœäžéã倧ãããªãïŒããã«å¯Ÿã LPG ã¯ã¬ã¹æ¯éã倧ããããåºåäœäžé㯠CNG ã«æ¯ã¹å°ããïŒãŸãäžæ¹ã§ã¬ã¹çæã¯ã¬ãœãªã³ã«å¯Ÿããªã¯ã¿ã³äŸ¡ãé«ãïŒç¹ã«äœå転åã§ã®èããã¯æ§ã«åªããããïŒäœå転åã®åºåäœäžéã¯é«å転ã«èŒã¹çžå¯Ÿçã«å°ãããªãïŒã倧éæã«èŠãŠã¬ãœãªã³ïŒLPGïŒCNG åçæ䜿çšæã®åºåã¯ã¬ãœãªã³â§LPG>CNG ã®æ§ã«ãªã£ãŠããïŒãå³ 13 ã¯ãã«ãã¹ãºãã®ä»£è¡šæ©çš®ã§ããã¯ãŽã³ R (1000 cc, DOHC, ε = 10.0) ã®åçæä»æ§ã§ã®åºåæ¯èŒã瀺ãïŒãåçææ¯ã«ç©ºçæ¯ïŒç¹ç«ææãªã©ãæé©åããŠã¬ã¹çæåã«äŒŽãåºåäœäžãæå°éã«ãšã©ãïŒã¬ãœãªã³ãšã³ãžã³ãšéè²ã®ç¡ãèµ°è¡æ§èœã確ä¿ããŠããïŒãè¡š 4 ã«ã¯ãŽã³ R ã«ãããã¬ãœãªã³ïŒLPGïŒCNG ã§ã®
å³ 12ãã¬ã¹ã€ã³ãžã§ã¯ã¿æèŒã¬ã€ã¢ãŠãäŸ
è¡š 3ãããŒã¹é·éãã«ãããšã³ãžã³æ§èœãžã®åœ±é¿
å³ 13ãã¬ãœãªã³/CNG/LPG åºåæ§èœæ¯èŒ (ã¯ãŽã³ R)
80
ç°äžå°ç§ïŒã€ã³ã ãã«ãã¹ãºã CNG/LPG Bifuel è»ã®éçº
(21)
81
CO2 æåºéæ¯èŒã瀺ãïŒã¬ãœãªã³äœ¿çšæã«å¯Ÿã LPG åã³ CNG 䜿çšæã¯åã çŽ 10%ïŒ20% ã® CO2 æåºéã®äœæžãå¯èœãšãªãã¬ã¹çæãšã³ãžã³ã®ç°å¢æ§èœã®åªäœæ§ã瀺ããŠããïŒãè¡š 5 ã«ã¯ãŽã³ R ã«ãããã¬ãœãªã³ïŒLPGïŒCNG ã§ææ°ã¬ã¹æåºæ§èœã«ã€ããŠæ¯èŒããçµæã瀺ãïŒãããã®çæ
ã§ã欧å·ã® Euro4 èŠå¶ã«çžåœããã€ã³ãã® BS4 èŠå¶ã«å¯Ÿå¿ããŠã¯ãªãŒã³ãªæã¬ã¹æ§èœãéæããŠããïŒããããªãã 3 å 觊åªãçšããåäžã®æµåã·ã¹ãã ãçšããæã«ïŒçæçš®ã«ããææ°ã¬ã¹ã®æåºåŸåã«å·®ãèŠãããïŒæåºã¬ã¹éã«ã€ããŠã¯çæåŽå°éãªã©ã®ãã¥ãŒãã³ã°ã®ä»æ¹ã«ãã£ãŠã CO, HC, NOx ã®åæã¬ã¹æåã®æåºåŸåãå€ãã£ãŠããŸãããåçŽæ¯èŒã¯é£ãããïŒåŸåãšããŠã¯ LPG, CNG 㯠NOx ãã¬ãœãªã³ãããå€ãåŸåã§ããïŒCNG 㯠HC ãå€ãåŸåã§ããã CO ã¯å°ãªãåŸåã§ãããšãããïŒã¡ã¿ã³ã®åå¿æ§ã LPG åã³ã¬ãœãªã³äžã«å«ãŸããä»ã®çåæ°ŽçŽ ãããçžå¯Ÿçã«äœãããšããã®ãããªçµæã«ãªããšèå¯ããïŒ
8. çµèš
ãCNG ã¯åœå ã§éœåžã¬ã¹ã® 13AïŒ12AïŒ6AïŒ5C ãªã©ã®ã¬ã¹ã®çš®é¡ãããããã«ïŒæµ·å€ã§ãå°åã«ãã£ãŠã¯ CNG ã®äž»æåã§ããã¡ã¿ã³ã®å«æéããŸã¡ãŸã¡ã§ïŒCO2ïŒN2 ãªã©ã®äžçã¬ã¹åïŒçºç±éã«å·®ç°ãããïŒãšã³ãžã³äŸçµŠã¬ã¹éã®é©åã«å°é£ãªã±ãŒã¹ããããšèããŸãïŒä»åã€ã³ãã¯æ¯èŒçå®å®ããæ§ç¶ã® CNG ãæµéããŠããããïŒã€ã³ãåããã€ãã¥ãšã«è»ã®éçºéäžã§çææ§ç¶ã«ããåé¡ã¯ãããŸããã§ãããïŒä»åŸæ°ããªåžå Žã« CNG è»ãå±éããæ©äŒãããã°ã¬ã¹æ§ç¶ã®éãã«æ³šæãå¿ èŠãšæããŠããŸãïŒ
è¡š 4ãçæå¥ CO2 æåºéæ¯èŒ (ã¯ãŽã³ R)
è¡š 5ãçæå¥ ææ°ã¬ã¹æåºéæ¯èŒ (ã¯ãŽã³ R)