The new changes specifically address the potential effects of small levels of calcium and magnesium on particulate traps used as part of the diesel exhaust after-treatment systems.

• 新的特殊的改变主要是微量元素钙和镁的潜在的低水平的影响，他们通常会成为柴油机后处理系统中随排气装置排出的微粒。