装有 PA4-185柴油机的54台机车在泰国的运用经验表明,通过改进油环的设计和采用球墨铸铁活塞,有可能将气缸盖的检查周期延长到2万公里。机油消耗率已经降低,换油期由六个月延长到十二个月。PA4系列的下一步发展可能包括采用变几何参数预燃室,结合采用压比为4:1的单级涡轮增压。此种增压器拟于今年晚些时候投入试用。 The experience of using 54 locomotives equipped with PA4-185 diesel engines in Thailand has shown that it is possible to extend the inspection cycle of the cylinder head to 20,000 kilometers by improving the design of the oil rings and using ductile iron pistons. Oil consumption rate has been reduced, the oil change period from six months to 12 months. Further development of the PA4 series may include the use of a variable geometry pre-combustion chamber in combination with a single-stage turbocharger with a 4: 1 pressure ratio. This turbocharger will be put into trial later this year.