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tính toán thiết kế động cơ đốt trong (dm4-0112)
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[...]... tin: m = mpt + m1 13 n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) Trong ú: m - Khi lng chuyn ng tnh tin (kg) mpt = 0,8(kg) - Khi lng nhúm piston m1- Khi lng thanh truyn qui v tõm cht piston (kg) Theo cụng thc kinh nghim: m1 = (0,275 ữ 0,350).mtt Ly m1 = 0,32.1 = 0,32 (kg) Vi mtt = 0,6 (kg) - Khi lng nhúm thanh truyn => m = 0,8 + 0,32= 1,12 (kg) n gin hn trong tớnh toỏn v v th ta ly khi lng trờn mt n... n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) 2.2.8. th ph ti tỏc dng lờn u to thanh truyn: Da trờn nguyờn lý lc v phn lc tỏc dng ti mt im bt k trờn cht khuyu v õu to thanh truy n s chuyn ng tng i gia chỳng ta cú th xõy dng c th ph ti tỏc dng lờn trc kh khi v c th ph ti tỏc dng lờn cht khuyu ta cn c vo ú v th ph ti ca trt thanh truyn 18 24 n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) Cỏch v nh sau... cu phõn phi khớ gm 2 trc cam c dn 380 dõy ai rng. õy chỳng ta s kho sỏt mt s h thng mang c im chung nht v ni tri ca n 370 Z 28 n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) Hỡnh 2.1.1 Mt ct ngang ng c c 2JZ - GTE 29 n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) Hỡnh 2.1.2 Mt ct dc ng c c 2JZ - GTE ng c c 2JZ - GTE l ng c 6 xy lanh thng hng cú h thng cam kộp (DOHC) gm b cho mi xylanh hai xupap np v hai... EF= 159773,11 Ni CF v FD, ng phõn nh hng CF thnh 8 phõn bng nhau v ỏnh s th t 0;1;2ng phõn nh FD thnh 8 phõn bng nhau v ỏnh s th t 0;1;2v cỏc ng bao trong tip tuyn 11;22;33Ta cú ng cong biu din quan h j = f ( x ) 12 n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) j ệTHậ GIA TC à j = 159,733 m/s2.mm C j(s) 1' F 2' 1 3' A E B F S 2 4' F 1 2 Hỡnh 1-5: th gia tc J = f ( x ) 3 4 D 1.2.2 Tớnh toỏn ng lc hc... -19,97 -0,76 22,87 4,23 0,81 -28,20 -0,60 21,16 3,38 0,91 -37,37 -0,42 17,20 1,77 0,98 -41,55 -0,21 9,13 0 1,00 -43,00 0,00 0,00 Bng 1-2: Bng giỏ tr T, N, Z- 18 n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) + V h trc ta Decac trong ú trc honh biu th giỏ tr gúc quay trc khuyu, trc tung biu din g T,N,Z T bng 2 ta xỏc nh c ta cỏc im trờn h trc, ni cỏc im li bng cỏc ng co hp cho ta th biu din: T = f ( ) Z =... 0,22 n 0,34mm s 2 0,45 n 0,57mm dõu 0,1 n 0,4mm 2.2.2 THANH TRUYN Thanh truyn c ỳc bng thộp hp kim 31 n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) Hỡnh 2.1.4 Kt cu thanh truyn 1-Thõn thanh truyn; 2-Bu lụng thanh truyn; 3-Np õu to 2.2.3 TRC KHUU Trc khuyu cú kt cu khỏ c bit, bờn trong cú ng dõu i bụi trn cỏc bc lút v c trc Hỡnh 2.1.5 Kt cu trc khuu 2.2.3.1 u trc : Trờn õu trc cú lp ai c khi ng, puly,bm... 2-Cũ m C cu iu chnh khe h thy lc duy trỡ khe h xu pỏp luụn bng 0 nh ỏp lc ca dõu v l 34 n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) Hỡnh 2.1.7 Kt cu con i thy lc 1-Piston y; 2-Bung ỏp sut thp; 3-ng dõu; 4-Lũ xo; 5-Bung dõu ỏp sut cao; 6-Lũ xo van bi; 7-Van bi Cam quay s nộn b pitton y v du trong bung ỏp sut cao Khi ú cũ m s ộp ti xu cỏch dựng b iu chnh khe h thy lc lm im ta Lũ xo y piston y i lờn, van... 0,94 0,98 1 0,98 0,94 0,87 0,77 0,64 0,12 0,15 0,18 0,21 0,23 0,24 0,24 0,24 0,23 0,21 0,18 0,15 0,16 0,19 0,21 0,23 0,24 0,25 0,24 0,23 0,21 0,19 0,16 0,12 0,08 0,04 0 17 n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) 510 520 530 540 550 8,90 9,08 9,25 9,42 9,60 560 9,77 570 9,95 580 10,1 2 10,3 0 10,4 7 10,6 5 10,8 2 11,0 0 11,1 7 11,3 4 11,5 2 11,6 9 11,8 7 12,0 4 12,2 2 12,3 9 12,5 7 590 600 610 620... n Tớnh Toỏn Thit K ng C t Trong (DM4-0112) ệTHậ CHUYN Vậ VN TC = 2 õọỹ/mm = 0.240 m/s.mm V v 0 Vmax 20 S( 40 V( S 60 80 100 120 140 160 180 0 1 2 1'' 3 2'' 3'' 4 4'' 5 5'' 6 6'' 7 7'' 8 9 10 3' 4' 5' 6' 7' 2' 8'' 1' 8' 9' 9''... tỏc: Ta tớnh T trong 1 chu k gúc cụng tỏc: ct = 180 180 4 = = 180 0 i 4 + Khi trc khuyu ca xylanh th nht nm v trớ 1 = 0 0 thỡ trc khuyu ca xylanh th hai nm v trớ 2 = 180 0 0 trc khuyu ca xylanh th ba nm v trớ 3 = 540 0 trc khuyu ca xylanh th t nm v trớ 4 = 360 Tớnh momen tng : T = T1 + T2 + T3 + T4 Tớnh giỏ tr ca Ttb bng cụng thc: 30.N i 10 3 Ttb = ( MN / m 2 ) R.FP n Trong ú : N i