6 Speed Auto Gearbox Tester
CNC Design has designed, manufactured and installed a dyno tester for Drive Systems International in Australia for full load testing of 6 speed automatic transmissions.
Drive Systems International is Australia's automotive gearbox transmission manufacturer. Over the last several year CNC Design has upgraded the dyno testers used by DSI for 5 speed rear wheel drive gearboxes. DSI has developed a range of 6 speed automatic transmissions and asked CNC Design to manufacture a completely dynanometer to both fill the transmission with oil and load test the trasnsmission. The machine is a fully automated modular system designed to be adapted to both front wheel and rear wheel transmissions. The fill station accurately fills the pre-heated transmission oil and circulated this thought the transmission. The part is then transferred to the dyno station for full load testing and simulation in each gear range. At the dyno station the input shaft and the two output shafts are automatically coupled to AC servo motors which are used to both drive and load the transmission. Various test sequences have been developed together with DSI to check the transmissions conformance to specification. The machine is controlled by a Siemens Sinumerik 840D which controls Sinamic AC servo drives and motors. All together there are 12 servo axes used for transferring the part and testing the transmission. As with all of our dynanometers we drive with one or more motors and apply the load with one or more motors operating in regenerating mode. This offers major energy savings with only 10% of the applied power required to be drawn from the mains. The control system also talks to the Transmission Control Unit (TCU) via Device Net for transferring information on gear selection and for recording data from the TCU during the test. While running the dynanometer records oil temperature and pressures, input and output shaft speeds and torques, gear selection and noise and vibration monitoring. Results are logged and for each trasnmission the data is logged and transferred to DSI's central computer. The machine is in production and has a production capability of one transmission each 2 minutes.
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