前言在1971年第九届国际内燃机会议上,英国帕克斯曼公司介绍了一种新设计的高功率“瓦伦特”(Valenta)柴油机。这种柴油机的单位活塞面积功率达0.7马力/厘米~2,同该公司当时生产的“文图拉”(Ventura)柴油机相比,功率提高了50%,而尺寸却增加不多,为了提高“瓦伦特”柴油机的可靠性,其主要零部件都作了重新设计。之后,帕克斯曼公司为了进 Preface At the 9th International Engine Conference in 1971, Parkesmann introduced a newly designed high-power Valenta diesel engine. With a piston power of 0.7 hp / cm², this diesel engine delivers up to 50% more power than the company’s then-produced Ventura diesel engine did, adding only modest increases in size to Improve the reliability of the “Valente” diesel engine, the main components have been redesigned. Afterwards, Parksman Company entered