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Post by wimfournier on Apr 12, 2019 16:17:16 GMT
I've always wondered how AP made it that you should have high oil pressure in the box when choosing reverse.
There must be something that effects the oil pressure rises as twice as high.
Is there 'something' in the labirinth?
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Post by richard1 on Apr 21, 2019 21:22:36 GMT
Tarija and Santa Cruz, Bolivia
I think the best explanation, as I understand it, is: Oil pressure is determined by the resistance at the end of the line, or wherever it has to flow. So due to the Reverse ratios, the resistance is higher. A good pump will be putting out 175 psi in Reverse, but only about 120 psi in forward gears.
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Post by wimfournier on Apr 22, 2019 10:40:45 GMT
I agree with you that in 'hydraulics' it is the resistance that dictates the pressure that the pump is gaining.
And now I'm looking where I could find the device that is giving this resistance. "Somewhere in the labyrinth" perhaps?
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Post by richard1 on Apr 23, 2019 12:08:38 GMT
Tarija and Santa Cruz, Bolivia
That resistance is the transmission. that is what drives the car backwards, and less for forwards. Then there is the bypass valve that lets a reduced amount go to the engine.
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