| 摘要 |
1,031,014. Engine running-in processes. BRITISH PETROLEUM CO. Ltd. April 30, 1963 [May 25, 1962], No. 16931/63. Heading F1M. In a method of running-in an engine in which a running-in additive is introduced into the cylinders, the engine is operated without external load during the running-in process. The additive, which is an abrasive material or a material which is converted to an abrasive in the cylinders, may be introduced into the air intake or into the fuel; a fuel containing such an additive is described in Specification 897,672. A running-in cycle comprises an initial phase, in which the speed is increased to 60-90% of maximum speed, a middle phase in which the speed is reduced to 40-60% of maximum speed, and a final phase in which the speed is increased to at least 70% of maximum. Each cycle may be of ¢ to 3 hours duration and the cycle may be repeated one or more times. |
