公开(公告)号：US3777559A

公开(公告)日：1973-12-11

申请号：US3777559D

申请日：1972-04-21

Applicant: NORTHROP CORP

Inventor： MITCHAEL W ,  WEISS R ,  RENNICK L ,  SHORE J ,  ALMICH C

IPC: F02P17/02 ,  G01M15/05 ,  G01M15/00

CPC classification number: F02P17/02 ,  G01M15/05

Abstract: A first counter is driven by pulses from a signal generator. A second counter is driven by the output of the signal generator divider by a factor in accordance with the number of cylinders in the engine under test. The output of the second counter is shifted to a register in response to a pulse which is phase synchronized with a predetermined point in the rotation cycle of the engine. The output of the register and the output of the first counter are compared for coincidence, a coincidence signal being generated which corresponds to a predetermined point in the cycle of each of the engine cylinders. These coincidence signals are used to generate window signals which provide gating signals to sensor circuits. The sensor circuits receive the outputs of sensors which provide electrical signals in accordance with various engine parameters. The outputs of the sensor circuits are gated to an indicator by the window signals so that the sensed parameters can be observed at predetermined identifiable portions of each engine rotation cycle.

Abstract translation: 第一计数器由来自信号发生器的脉冲驱动。 第二计数器由信号发生器分压器的输出根据被测引擎中的气缸数量的因数驱动。 响应于与发动机的旋转周期中的预定点相位同步的脉冲，第二计数器的输出被移位到寄存器。 将寄存器的输出和第一计数器的输出进行比较，以便一致，产生与每个发动机气缸的循环中的预定点对应的一致信号。 这些重合信号用于产生向传感器电路提供门控信号的窗口信号。 传感器电路接收根据各种发动机参数提供电信号的传感器的输出。 传感器电路的输出通过窗口信号门控到指示器，使得可以在每个发动机旋转周期的预定可识别部分处观察感测的参数。