1.前言为了使内燃机能以正常的状态运转,涉及的因素是很多的。例如,需要不断地监视燃油供给量、进排气压力、进排气温度、冷却水温度、机油压力、机油温度等参数,而且还需要正确地维持这些参量。但是,不断地计量这许多应该测定的参数值,即使其值是处在所规定的范围内,也未必能保证发动机以正常的状态 1. Introduction There are many factors involved in the normal operation of the internal combustion engine. For example, constant monitoring of fuel supply, intake and exhaust pressure, intake and exhaust air temperature, cooling water temperature, oil pressure, oil temperature and other parameters is required, and these parameters need to be properly maintained. However, it is not always possible to constantly measure the value of many of the parameters that should be measured, even if the value is within the prescribed range,