Kodi ntchito ya sensa ya camshaft ya galimoto ndi yotani?
Chojambulira malo a camshaft ndi chipangizo chozindikira, chomwe chimadziwikanso kuti chojambulira chizindikiro cholumikizira. Ndi chipangizo chojambulira malo cha silinda chomwe chimalowetsa chizindikiro cha malo a camshaft ku ECU ndipo chimagwira ntchito ngati chizindikiro chachikulu chowongolera kuyaka.
Makhalidwe a Kapangidwe
Masensa a photoelectric crankshaft ndi camshaft position sensors opangidwa ndi Nissan ndi mitundu yabwino kwambiri ya ogulitsa. Makamaka amakhala ndi diski ya chizindikiro (monga, chozungulira chizindikiro), jenereta ya chizindikiro, chogawa, nyumba ya sensor, ndi cholumikizira cha waya.
Chimbale cha chizindikiro ndi chozungulira chizindikiro cha sensa ndipo chimakanikizidwa pa shaft ya sensa. M'mphepete mwa chimbale cha chizindikiro, pali mphete ziwiri zozungulira za mabowo otumiza kuwala okhala ndi ma intervals ofanana. Pakati pawo, mphete yakunja ili ndi mabowo 360 otumiza kuwala (缝隙), okhala ndi interval arc ya 1. (Mabowo otumiza kuwala amakhala 0.5, ndipo mabowo a shading amakhala 0.5.) Amagwiritsidwa ntchito popanga ngodya yozungulira ya crankshaft ndi ma speed signals； mphete yamkati ili ndi mabowo 6 otumiza kuwala (mabowo a rectangular), okhala ndi interval arc ya 60, omwe amagwiritsidwa ntchito popanga ma signals apamwamba a pakati a silinda iliyonse. Pakati pawo, bowo limodzi la rectangular lili ndi mbali yayitali pang'ono, lomwe limagwiritsidwa ntchito popanga ma signal apamwamba a pakati a silinda 1.
Jenereta ya chizindikiro imakhazikika pa chipinda cha sensa. Imakhala ndi jenereta ya chizindikiro cha Ne (liwiro ndi ngodya yozungulira), jenereta ya chizindikiro cha G (chizindikiro chapakati chakufa), ndi dera lokonza ma signal. Jenereta zonse za chizindikiro cha Ne ndi G zimapangidwa ndi LED ndi phototransistor (kapena photodiode), ndipo ma LED awiri akuyang'anizana ndi phototransistors awiri motsatana. Mfundo yogwirira ntchito
Chimbale cha chizindikiro chimayikidwa pakati pa diode yotulutsa kuwala (LED) ndi transistor yowunikira zithunzi (kapena photodiode). Bowo lotumiza kuwala pa chimbale cha chizindikiro likazungulira pamalo pakati pa LED ndi transistor yowunikira zithunzi, kuwala komwe kumatuluka ndi LED kudzawala pa transistor yowunikira zithunzi. Panthawiyi, transistor yowunikira zithunzi imayenda ndipo chosonkhanitsa chake chimatulutsa mulingo wotsika (0.1 - 0.3V). Pamene gawo la mthunzi pa chimbale cha chizindikiro likuzungulira pamalo pakati pa LED ndi transistor yowunikira zithunzi, kuwala komwe kumatuluka ndi LED sikungawala pa transistor yowunikira zithunzi. Panthawiyi, transistor yowunikira zithunzi imadulidwa ndipo chosonkhanitsa chake chimatulutsa mulingo wapamwamba (4.8 - 5.2V).
Ngati chimbale cha chizindikiro chizungulira mosalekeza, dzenje lotumiza kuwala ndi gawo lophimba lidzadutsa motsatizana ndi LED kuti likhale lowonekera kapena lokhala ndi mthunzi. Chosonkhanitsa cha transistor yowunikira zithunzi chidzatulutsa motsatizana milingo yapamwamba ndi yotsika. Pamene shaft ya sensa izungulira ndi crankshaft ndi valve timing camshaft, dzenje lotumiza kuwala ndi gawo lophimba pa diski ya chizindikiro lidzadutsa ndi LED. Kuwala komwe kumachokera ku LED kudzawala motsatizana pa transistor yowunikira zithunzi ya jenereta ya chizindikiro chifukwa cha kuwala ndi mthunzi wa diski ya chizindikiro. Chifukwa chake, chizindikiro cha pulse chogwirizana ndi malo a crankshaft ndi valve timing camshaft chidzapangidwa mu sensa ya chizindikiro.
Popeza crankshaft imazungulira kawiri, sensa imayendetsa diski ya chizindikiro kuti izungulire bwalo limodzi lonse. Chifukwa chake, sensa ya chizindikiro cha G ipanga zizindikiro 6 za pulse. Sensa ya chizindikiro cha Ne ipanga zizindikiro 360 za pulse. Chifukwa chakuti arc ya interval ya dzenje lotumiza kuwala la chizindikiro cha G ndi madigiri 60, chizindikiro cha pulse chimapangidwa madigiri 120 aliwonse a crankshaft. Chifukwa chake, chizindikiro cha G nthawi zambiri chimatchedwa chizindikiro cha 120. Kukhazikitsa kapangidwe kake kumatsimikizira kuti chizindikiro cha 120 chimapangidwa madigiri 70 asanafike pakati pa dead (BTDC70). Chizindikiro chomwe chimapangidwa ndi dzenje lotumiza kuwala lomwe lili ndi m'lifupi wokulirapo pang'ono limafanana ndi madigiri 70 asanafike pakati pa dead ya silinda 1 ya injini, kuti ECU izitha kuwongolera ngodya yoyendetsera mafuta ndi ngodya yoyendetsera kuyatsa. Chifukwa interval arc ya dzenje lotumiza kuwala la chizindikiro cha Ne ndi digiri 1 (dzenje lotumiza kuwala limatenga madigiri 0.5 ndipo dzenje lophimba mthunzi limatenga madigiri 0.5), mu pulse cycle iliyonse, milingo yapamwamba ndi yotsika iliyonse imatenga ngodya imodzi ya crankshaft. Zizindikiro 360 zimayimira kuzungulira kwa madigiri 720 a crankshaft. Ma digiri 120 aliwonse a crankshaft, sensa ya chizindikiro cha G imapanga chizindikiro chimodzi ndipo sensa ya chizindikiro cha Ne imapanga zizindikiro 60.
Ngati mukufuna kudziwa zambiri, pitirizani kuwerenga nkhani zina patsamba lino!
Chonde tiimbireni foni ngati mukufuna zinthu zotere.
Malingaliro a kampani Zhuo Meng Shanghai Auto Co., Ltd. yadzipereka kugulitsa MG&MAXUSzida zamagalimoto zalandiridwa kugula.
