干式离合器半联动滑磨热载荷控制

Slipping Friction Load Control of Dry Clutch on Semi linkage Manipulation

摘要:

离合器半联动是汽车在拥堵路况下的常用操纵方式，频繁的半联动产生大量热易使干式离合器失效.首先分析了离合器半联动过程中的热载荷，建立了干式离合器接合模型、发动机模型和滑摩阻力模型.提出了通过使离合器的接合程度在单次跟进的过程中保持不变并刚好可以克服行驶阻力的控制策略，以降低频繁的半联动操作次数.分别在水平良好和2%以及5%坡度路面上，对控制前后的离合器滑摩功进行了比较，结果显示采用该控制策略将半联动跟进10m产生的滑摩功分别降低了3.72 %，36.00%和71.35%.

Abstract:

Dry clutch semi linkage manipulation is often resorted to on congested roads, but frequent semi linkage may generate a lot of heat and cause the clutch failure. An analysis was made of the heat load of the clutch during semi linkage process. A dry clutch engagement model, an engine model and a resistance model were established respectively. A control strategy was proposed, which overcame the running resistance by controlling the degree of engagement of the clutch with a single semi linkage manipulation so as to avoid the frequent semi linkage operations. A comparative study was made of the slipping friction power before and after semi linkage control on the pavement of 2% and 5% slope as well as the pavement in good condition. Results show that the slipping friction power was reduced by 3.72 %, 36.00% and 71.35% respectively.