| 摘要 |
PCT No. PCT/SE88/00235 Sec. 371 Date Oct. 23, 1989 Sec. 102(e) Date Oct. 23, 1989 PCT Filed May 5, 1988 PCT Pub. No. WO88/08926 PCT Pub. Date Nov. 17, 1988.An arrangement in combustion chamber surfaces of an internal combustion engine, wherein these surfaces exhibit at least partially a thin surface layer (2) which will influence the octane/cetane rating requirement of the engine in a manner to limit the knocking tendency of the engine. The surface layer (2) comprises a material of low reflectivity and high absorptivity in respect of electromagnetic waves having a wavelength of up to at least 7 mu m. The surace layer (2) has located therebeneath a layer (3) which functions as a transient heat buffer and alternately absorbs heat from and emits heat to the surface layer (2). |
