| 摘要 |
Simple and low cost limited slip differential that operates by using the gears (3, 4, 5 and 6) of the differential. These gears are enclosed in a casing 10, whose sides are shaped according to the outer surface of the teeth of each one of said gears. Said casing encloses said gears in a way that the tolerance 20 between the inner surface of said casing and the outer surface of the teeth of each gear is very small. All areas between the inner surface of said casing 10 and the teeth of above mentioned gears 3, 4, 5 and 6 are filled with oil. When the two output shafts of the differential do not rotate with the same speed, the spider gears 3 and 4 of the differential rotate around their axles in respect to the side gears 5 and 6. During this rotation, each pair of co¬ operating gears operates as a hydraulic pump, pumping the oil out from the pressurization area 11 to the suction area 17, via slots / holes 15 that - for this reason - exist in the casing 10. By determining / adjusting suitably the size of the said slots / holes 15 and the said tolerance 20, the hydraulic resistance of the system is designated. Pressure of oil is remarkably increased due to said hydraulic resistance and therefore, restraining toque is developed to said differential gears, limiting their free rotation. In this way, the two output shafts of the differential operate as been partially engaged, meaning that when one of them is allowed to rotate without transferring any torque, the torque that is transferred to the other shaft is not almost zero, but remarkably high.
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