2results about How to "Improve vehicle efficiency" patented technology

A CVT speed ratio optimization control method and system includes the following steps: Step 1) Using the current speed ratio of the vehicle as a benchmark, calculate the corresponding comprehensive efficiency based on the speed ratio under different search directions, compare the comprehensive efficiency under different search directions, and determine the optimal search direction; Step 2) In the optimal search direction, continue to adjust the current speed ratio according to different search step sizes, and calculate the corresponding comprehensive efficiency value respectively. The speed ratio corresponding to the maximum comprehensive efficiency value is the target optimized speed ratio; Step 3) Determine whether using the target optimized speed ratio affects the vehicle's backup driving force. If it does not affect it, control the current CVT speed ratio to become the target optimized speed ratio; if it does affect it, do not optimize the current speed ratio. This invention can improve the overall efficiency of the vehicle without complex offline calibration, improving energy economy while ensuring the user's driving experience.

The pure electric 80-ton shovel-type support transport vehicle of the present invention belongs to the technical field of design and manufacturing of auxiliary transportation equipment for coal mines; it comprises a shovel, a front frame, a middle frame, a rear frame, a battery lifting frame and a battery rack, the shovel is arranged in front of the front frame, the front frame is connected to the middle frame through a hinged part, the middle frame is connected to the rear frame through a slewing bearing, the rear frame is connected to the battery rack through a battery lifting frame, batteries are installed on the battery rack, the slewing bearing is a double-row slewing bearing, the battery rack is also connected to the rear frame through a battery tilting mechanism, under the action of the battery tilting mechanism, the tail of the battery rack is tilted up or laid flat to adapt to different ground slopes; the present invention adopts a dual-motor single-bridge input time-sharing drive mode to solve the shortcomings of large power and large volume of a single motor, separates motors of the same power to reduce the volume, and can be applied to vehicles with thin coal seams, and the time-sharing drive can improve the efficiency of the whole vehicle and extend the cruising range of the battery shovel truck.