Measuring device for measuring the lift of spring-loaded inlet and outlet valves of internal combustion engines

摘要

The invention relates to a measuring device for measuring the lift (2) of spring-loaded valves (1) of internal combustion engines, having an inductive or capacitive position pickup (position encoder, displacement sensor) which has sensor parts (10, 11) respectively fixed to the housing and to the valve. In order to reduce the outlay on measurements (2) of valve lift, it is proposed that the two sensor parts (10, 11), which are arranged concentrically relative to the valve shaft (1'), are arranged inside the spring chamber (9) bounded by the valve spring (5). The sensor part (10) fixed to the housing is mounted on a fixed spring cup (spring retainer) (6), and the sensor part (11) fixed to the valve is mounted on a spring cup (7) which moves together with the valve shaft (1'). <IMAGE>