Engine power test method: steady dynamometer (dynamometer with load or dynamometer with external load); Dynamic dynamometer (no-load dynamometer or no-load dynamometer); According to the principle of dynamometer, no-load dynamometer can be divided into two categories: 1. Measuring instantaneous power by measuring instantaneous angular acceleration; 2. Measure the average power by measuring the acceleration time.

Instantaneous acceleration measurement scheme is an instrument scheme to obtain instantaneous power by measuring the acceleration of a certain speed during acceleration. The instrument designed in this project consists of sensor, pulse shaper, time signal generator, acceleration calculator and control device, conversion analyzer, conversion switch, power indicator, tachometer and power supply.

Working principle: The electromagnetic induction sensor is installed in a special processing hole on the clutch housing, and keeps a gap of 2~4mm with the tooth tip of the flywheel gear ring, so it is a non-contact sensor. When the flywheel rotates, the sensor generates a pulse signal. The frequency of the pulse is the number of teeth of the flywheel gear ring multiplied by the number of revolutions per second of the flywheel, that is, the number of teeth of the flywheel gear ring, which is the speed signal of the engine. The pulse signal from the sensor is shaped and amplified by the pulse shaping device to become a rectangular trigger pulse signal. The frequency of the pulse signal is usually amplified by 2-4 times.

Million car purchase subsidy