英语翻译The Reading MaterialHigh compression for starting and lo

英语翻译
The Reading Material
High compression for starting and lower compression under load is highly desirable for diesel engines .One method of attaining this goal is the variable compression ratio (VCR)piston.
One form of VCR piston has been developed that provides improved starting ,better isling and improved output per cubic inch of displacement .Comparisons were made of a VCR piston engine and a conventional engine of the same displacement and same general design.Tests indicated a gross brake horsepower (bhp) for the conventional engine of 550.the engine with VCR pistons produced 1475 bhp .
Other variable compression ratio components include the connecting rod ,which is modified to allow engine oil to transfer from the connecting rod bearing through a slipper to the inner piston .The outer piston corresponds to the normal piston in that it contains the combustion chamber and oil rings .The inner piston is an aluminum forging and contains the valves and hydraulic sealing rings .It is connected to its rod by the piston pin in the conventional manner .
The entire assembly of inner and outer pistons is limited in travel by the piston retaining ring ,which provides a mechanical stop for upward motion of the piston .