Disclosed are methods for removing engine deposits in a recprocating internal combustion engine by introducing a cleaning composition into an air-intake manifold of a warmed-up and idling reciprocating internal combustion engine and running the engine while the cleaning composition is being introduced. One such cleaning composition suitable for these methods comprises a first solution containing a mixture of: (a) a phenoxy mono- or poly(oxyalkylene) alcohol; (b) at least one solvent selected from (1) an alkoxy mono- or poly(oxyalkylene) alcohol and (2) an aliphatic or aromatic organic solvent; and (c) at least one nitrogen-containing detergent additive; and a second solution containing a mixture of: (d). a phenoxy mono- or poly(oxyalkylene) alcohol; (e) a cyclic carbonate; and (e) water.
本发明公开了清除再循环内燃机中发动机沉积物的方法,方法是将清洁组合物引入预热和怠速的往复式内燃机的进气歧管中,并在引入清洁组合物的同时使发动机运转。一种适用于这些方法的清洗组合物包括第一种溶液,其中含有以下物质的混合物:(a) 苯氧基单烷基或聚氧亚烷基醇;(b) 至少一种选自(1) 烷氧基单烷基或聚氧亚烷基醇和 (2) 脂肪族或芳香族有机溶剂的溶剂;(c) 至少一种含氮清洗剂添加剂;以及第二种溶液,其中含有以下物质的混合物:(d).苯氧基一元醇或聚氧亚烷基醇;(e) 环状
碳酸盐;和 (e)
水。