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在发展新型发动机的过程中,在Winteithur的Sulzer试验台上,对现有的一台柴油机进行了一系列的试验。试验的目的,是研究现有发动机的换气过程,以便将它们与其新的机型进行比较。试验的结果用实例说明。测量时利用压电式远程控制的小型转换阀,可把大气压力线录入气体压力的变化,以便有可能用压电式感压器测量绝对压力。此外并且叙述了一种自动转换阀,这种阀不仅可以录入大气压力线,而在作为换气过程正常地记录低压时,可用自动闭塞的方法机械地截断发火压力。所有这些非常主要的开关操作(记录示波器的开动,转换阀从大气压力线向压力曲线的转换,回到大气压力线的转换,以及利用静电计放大器接地能随后对大气压力线偏差的修正等),都是由一种程序开关来控制的。
In the development of a new engine, a series of tests were carried out on an existing diesel engine at Winteithur’s Sulzer test rig. The purpose of the test was to study the ventilation of existing engines in order to compare them with their new models. The test results are illustrated by examples. Measurement using piezoelectric remote control of the small conversion valve, atmospheric pressure line can be recorded into the gas pressure changes, so that it is possible to use the piezoelectric pressure sensor to measure absolute pressure. Furthermore, an automatic changeover valve is described, which not only registers the atmospheric pressure line, but also automatically blocks the firing pressure by automatic closing when the low pressure is normally recorded as a scavenging process. All of these very major switching operations (recording oscilloscope start-up, switching of the diverter valve from atmospheric pressure line to pressure curve, switching back to atmospheric pressure line, grounding of the electrometer amplifier and subsequent correction of atmospheric pressure line deviation, etc.) , Are controlled by a program switch.