| 摘要 |
<p>A vehicle power transmission (2) and a vehicle powertrain (30) capable of being continuously controlled over a predetermined range of operation. The powertrain (30) includes two power units (32, 34), the power transmission unit (2) and a control device (58) for receiving command input and determining performance parameters associated with the operation of the powertrain (30). The power transmission unit (2) includes an outer transmission (8, 10, 16) and an inner differential gear assembly (8, 20, 22). The main transmission (2) has two rotatable inputs (8, 10), each operably connected to one power unit (32, 34) for receiving rotational power and operably connected to a rotatable output (16) so that the rotational speed of the output (16) can vary in proportion to the algebraic mean of the speeds of rotation of the two inputs (8, 10). The differential gear assembly (18, 20, 22) is arranged internally of the main transmission (8, 10, 16) and has a rotatable input (18) operably connected to two differentially rotatable outputs (24, 26). The output (16) of the main transmission is operably connected to the input (18) of the differential gear assembly (18, 20, 22). The performance parameters determined by the control device (58) include the load on each of the two para units (32, 34). The rotational speeds of each of the inputs (8, 10) of the main transmission (8, 10, 16), the load on each of the two outputs (24, 26) and the rotational speeds of each of the two outputs (24, 26) of the differential gear assembly (2). A closed loop feedback control continuously monitors, analyses and adjusts the performance parameters in response to command input, to maintain the efficiency of the power units (32, 34) within peak ranges while simultaneously continuously monitoring and adjusting the load sharing to synergically control the final output speed and power of the power transmission unit (2) to meet operational requirements.</p> |
