Cooled water pump performance testing system of vehicle engine

The utility model relates to a cooled water pump performance testing system of vehicle engine, comprising an industrial controlling machine (computer) system, an observing and controlling system, a test desk frame and an operation desk. The key technology is that an impulse counter interface card (2), an I/O interface card (3), A/D and D/A multiple function interface cards (4) are inserted into the industrial controlling machine (1) for realizing data acquisition and sending forth control commands; a differential pressure transducer (18) detects the pressure difference of the inlet and outlet of the tested water pump (19); the flow quantity detection and control device is composed of a flow quantity transducer (25), a gear (26), a stepping motor (27), a flow quantity adjusting valve (28), a position switch (29), a pulse generator (10) and a stepping motor driver (11); an asynchronous motor (22) drives the tested water pump (19), and the frequency speed control mode is realized by a frequency converter (7). The utility model has high degree of automation and reliability and easy operation.