| 摘要 |
PCT No. PCT/GB89/01094 Sec. 371 Date May 17, 1990 Sec. 102(e) Date May 17, 1990 PCT Filed Sep. 19, 1989 PCT Pub. No. WO90/03558 PCT Pub. Date Apr. 5, 1990.The apparatus for measuring the comparative output power of each cylinder of a multi-cylinder engine comprises a digital signal processor 1 and a phase locked loop detector 2. By inputting instantaneous current measurements from (e.g.) a current transformer attached to an alternator output of an engine under test and analysing same in the processor 1, instantaneous engine speed may be measured. This measurement may be processed to determine comparative measurements of compression and power output of each of the cylinders.
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