Measuring the relationship between input torque and resulting gear strain in a large gear box.
In the development of complex gear boxes, such as those used on helicopters to drive the rotor, it is critical to understand the torque on the input shaft, and the resulting strains on the gears within the gearbox. In addition, it is critical that the torque and strain measurements be made simultaneously for the input shaft and each gear, and be measured with a high sample rate to capture the true dynamic loading occurring between the gears. …
Trend towards increased number of gears in automatic transmissions.
In order to keep an engine operating at an rpm range which has the best torque (power) and fuel efficiency, transmission manufacturers are stepping up the number of gears used in their automatic transmissions. Using multiple gears with a smaller ratio between gears results in smoother and quieter acceleration, and can increase fuel economy depending on other drivetrain factors such as vehicle size, engine size, and drive axle ratios. It also results in reduced C02 emissions…