變搖臂比對凸輪軸下置式配氣機構動力學、運動學的影響-無錫油泵油嘴研究所

1、 ExciteTiming AVL EXCITE TIMING z im y/yi ExciteTiming AVL EXCITE TIMING z im y/yiRsin sin( rsin Rsin sin( rsin sin( zrsinsin( )，yRsinsin(，im y/z Rcos( arcsin(sin y/R) arcsin(sin z/r)，i / rcos( 2.2 配 Excite Timing Drive 2（如 1 2 3 4 6 7 5 計算結3的氣門升程較小， 而在其它位置，定搖臂比的氣門升程較大；表現(xiàn)出與圖 3 中定搖臂比及 兩者的差別達正負 5%左右，但

2、 valve lift_i0mm 86420 valve lift_i0mmequiv.follower9 valve valvelift_i0mmequiv.follower 3 valve valvevalve 計算結3的氣門升程較小， 而在其它位置，定搖臂比的氣門升程較大；表現(xiàn)出與圖 3 中定搖臂比及 兩者的差別達正負 5%左右，但 valve lift_i0mm 86420 valve lift_i0mmequiv.follower9 valve valvelift_i0mmequiv.follower 3 valve valvevalve 0valve valve velocity_

3、i0mm/degfollower valve followervelocity_imm/deg valve velocity_i0mm/degfollower valve followervelocity_imm/deg valve velocity_i0mm/degfollower 5valve followeracceleration_imm/deg2 valveacceleration_i0mm/deg2follower 0valvevalve 0valve valve velocity_i0mm/degfollower valve followervelocity_imm/deg va

4、lve velocity_i0mm/degfollower valve followervelocity_imm/deg valve velocity_i0mm/degfollower 5valve followeracceleration_imm/deg2 valveacceleration_i0mm/deg2follower 0valvevalve 0valve follower圖 6 定搖臂比與變搖臂比氣門加速度比contact stress r_iMPa contact stress 0_iMPa contactstressr_i0MPa contact stress contact

5、stress r_iMPa contact stress 0_iMPa contactstressr_i0MPa contact stress 7脫，而定搖臂比出現(xiàn)了 6 次。 搖臂比的最大落座力較變搖臂比的大10高速時定搖臂比的最大氣門落座力反而較小顯大于變搖臂比的限于篇幅，其它方面動力學比較不再贅述 valve 0valve follower圖 6 定搖臂比與變搖臂比氣門加速度比contact stress r_iMPa contact stress 0_iMPa contactstressr_i0MPa contact stress contact stress r_iMPa conta

6、ct stress 0_iMPa contactstressr_i0MPa contact stress 7脫，而定搖臂比出現(xiàn)了 6 次。 搖臂比的最大落座力較變搖臂比的大10高速時定搖臂比的最大氣門落座力反而較小顯大于變搖臂比的限于篇幅，其它方面動力學比較不再贅述 valve re at Cam_iPa 0equiv.cam8Max Seat Force_i MaxSeatForce_i0Engine 圖9變搖臂比與定搖臂比最大落座力比 Contact veloc 4 0.0 ofthevalvesforFixRock time cam angle s deg 195 040 525.946

7、 -929 531.719 -961 535.349 -71 537.960 - tveloc fthevalvesforVarRock me cam angle s deg 47 62 525.088 -37 530.644 -72 534.022 -i4對rat Seat re at Cam_iPa 0equiv.cam8Max Seat Force_i MaxSeatForce_i0Engine 圖9變搖臂比與定搖臂比最大落座力比 Contact veloc 4 0.0 ofthevalvesforFixRock time cam angle s deg 195 040 525.946 -929 531.719 -961 535.349 -71 537.960 - tveloc fthevalvesforVarRock me cam angle s deg 47 62 525.088 -37 530.644 -72 534.022 -i4對rat S