螺伞滑动珩磨网纹参数

But honing has moved forward in the meantime and along with it the surface structures together with the corresponding roughness parameter have been further refined for an even lower oil consumption and thus emission of combustion engines. The latest honing specification proven by Nagel and recommended for low oil consumptions is as follows:

（这几年来，为了追求更低的油耗和满足更高的排放标准，我们NAGEL也和一些厂家合作，致力于开发更好的珩磨网纹参数。以下是我们NAGEL经过大量试验证明的能进一步降低机油消耗的最新网纹参数：）

Rpk ≤ 0,2 µm

Rk = 0,2 – 0,6 µm

Rvk = 1,0 – 2,0 µm

Mr1 ≤ 10%

Mr2 = 60 – 80%

This specification has been proven in vast and extensive trials by Nagel with and without partners in the car industry. It provides at present the highest level of quality for piston bores of combustion engines for low emissions and high life times. Thus this specification was adopted by lots of engine manufacturers as well as engineering companies like FEV and AVL.

（上述网纹参数已经通过NAGEL及一些合作的汽车生产商的大量和广泛的试验得到了证实。目前这种网纹参数的内燃机缸孔，可以说在机油消耗量和缸孔寿命上的表现是最优秀的。所以它已经被许多发动机生产商以及研发机构如FEV和AVL所采纳。）

With this specification the Rpk value is further reduced leading to less friction during the running in period of engines. This also minimises mutual wear of piston rings and piston bores. Furthermore the Rk-value was cut down leading to a higher wear resistance of the surface structure as well as a reduction of oil volume (oil film) on the piston bore surface. Both phenomena lead to lower oil consumption.

（这种网纹参数中Rpk值更小，这样发动机磨合期间缸孔和活塞环之间的摩擦力会更小，这要就进一步减少了缸孔和活塞环的磨损。另外，这个参数中的Rk值也更小，这也同样进一步降低了缸孔和活塞环间摩擦力，同时也减少了运行中缸孔和活塞环之间润滑油膜量。通过这两点，使得发动机的机油消耗进一步减少。）

The Rvk-value should be fixed according to the demand of the whole system and the piston ring quality. It should be as small as possible to reduce the oil volume sticking on the piston bore but still big enough to guarantee for a good lubrication of the piston rings. Rvk-values of 1,0 –2,0 µm have been proven well as good compromise.

（而Rvk值由于系统和活塞环质量的原因，和原来滑动珩磨参数相比是一个没有变化的值。Rvk1.0-2.0的数值被证实是能刚好满足活塞环运动润滑需要的最理想的参数。超过这个范围油耗将增加，小于这个范围润滑将不够充分。）

The Mr1 and Mr2-values are not so important and pretty much overestimated by the market. They are calculated values and depend strongly on the R-values.

（Mr1和Mr2两个数值相比上述三项指标已经不是很重要了。原因是这两个数值是计算的数值且随着上述

Rpk/Rk/Rvk值的确定而确定。）

Last but not least the honing angle becomes more and more decisive in the slide honing technology. It has been proven in recent trials that honing angles of 130-140° lead to a further reduction of friction and thus also oil consumption of combustion engines. The corresponding honing technology has been developed by Nagel and is called helical slide honing. It is being introduced into mass production of cylinder blocks at the moment.

（最后，珩磨角度现在对于滑动珩磨来说也起到了相当的作用。在最近的试验中我们证实当珩磨角度增加到130-140度的时候能进一步降低发动机缸孔和活塞环间摩擦阻力，从而进一步降低油耗，我们把这种珩磨技术称之为螺伞滑动珩磨。目前，我们也正在将这种珩磨技术推广到量产的发动上。）