The limited amount of drive cycle analysis that I have seen did seem to overstate the benefits of the hybrid. Only velocity info was used and the effects of coasting, cornering and hills were not included. Might not be back of the envelop work but still it left a lot of room for error. I think...
Nice find on the Tucker “Flowing power” advertisement, I enjoyed it. It also makes a good point. The torque converter was applied to autos as early as 1947 but did not come into wide use until it was “properly implemented”, i.e. placed between the engine and transmission and a stator mounted on...
Good question and good comments. When the EPA/UPS truck first came out I remember reading an article containing component info but I can’t find it now. Relying on my less than perfect memory I think the main engine driven pump has a capacity of 130cc/rev and the three pump/motors on the...
BrianPetersen and tbuelna are right. The gears have a fixed torque ratio that cannot be changed and is determined by the force balance on the planet gear. Excluding acceleration and gear losses, the contact force between the ring gear and the planet must be equal and in the same direction as the...
