engine brake while towing?
OK, so just getting a feel for towing my 5er with the 2013 Ram Cummins. When tow enabled (heavy tow used with appropriate tire pressure) and engine brake on, going downhill after taking foot off gas ...
Forum Discussion
ShinerBock wrote:wilber1 wrote:
No, it does not increase the pressure, it increases the velocity. If you attached another hose to the end of that nozzle and put a pressure gauge immediately downstream, the pressure would be lower. If you blocked that hose, the pressure would be the same on both sides of the nozzle.
At the end of that nozzle you have reduced flow to increase output pressure. Same thing that happens in an automatic transmission. It reduces flow to certain valves in a series of valves to increase pressure and flow going into other valves.
You haven't increased pressure, you have just use the existing pressure to give a greater velocity to a smaller volume of water. The pressure drops as soon as the water leaves the nozzle.
You can increase the mechanical force applied by using hydraulic pressure on a small piston which in turn applies pressure to a larger piston but there is no fluid transfer and every time you double the force, you cut the distance moved in half, like a pulley system. Even then, the maximum amount of force you can apply is limited by the amount of pressure you can apply to the smaller piston.
Brake systems are a good example of this. Up to a point, the strength in your leg is adequate, after that point, you need a booster. ie: more pump.
