Proportioning valve: Difference between revisions
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{{Short description|Vehicle component}} |
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{{Unreferenced|date=October 2006}} |
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{{More footnotes|date=February 2022}} |
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[[ |
[[File:Proportional-Safety Valve.svg|right|thumb|A cross-section of a proportioning safety valve]] |
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A '''proportioning valve''' is a [[valve]] that relies on the laws of [[fluid pressure]] to distribute input [[force]]s to one or more output lines. |
A '''proportioning valve''' is a [[valve]] that relies on the laws of [[fluid pressure]] to distribute input [[force]]s to one or more output lines. |
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A simple example is an input tube with cross-sectional area ''A'' entering a chamber. Leading out of the chamber are two more tubes, one with cross-sectional area 3''A'' and the other with area ''A''/2. If a force ''F'' is applied to the fluid in the input tube, the pressure in that tube will be ''F''/''A''. Utilizing pressure laws, we find that each output tube will see the same pressure. This means the output tube with area 3''A'' will yield a force of 3''F'', and the output tube with area ''A''/2 will yield a force of ''F''/2. Thus, if you apply a 10-[[pound force]] to the input, you will get forces of 30 lbf and 5 lbf, respectively, from the outputs. If you apply a 10-[[Newton (unit)|newton]] force to the input, you will get forces of 30 N and 5 N, respectively, from the outputs |
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Proportioning valves are frequently used in [[automobile|cars]] to reduce the [[brake fluid]] pressure to the rear brakes. |
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Proportioning valves are frequently used in [[automobile|cars]] and other road vehicles to reduce the [[brake fluid]] pressure to the rear brakes. Due to weight distribution during heavy braking, more pressure is needed for front brakes. A proportioning valve reduces the pressure in the hydraulic lines to the rear brakes relative to that supplied to the front brakes during this heavy braking. |
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==See also== |
==See also== |
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* [[Pressure regulator]] |
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* [[ |
* [[Electronic brakeforce distribution]] |
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==References== |
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*''Fundamentals of Automotive Technology: Principles and Practice.'' Jones & Bartlett Publishers, Aug 1, 2013 pg. 1013 |
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{{Reflist}} |
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{{DEFAULTSORT:Proportioning Valve}} |
{{DEFAULTSORT:Proportioning Valve}} |
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[[Category:Valves]] |
[[Category:Valves]] |
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[[Category:Vehicle braking technologies]] |
[[Category:Vehicle braking technologies]] |
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Latest revision as of 19:58, 27 December 2023
 | This article includes a list of general references, but it lacks sufficient corresponding inline citations. (February 2022) |
A proportioning valve is a valve that relies on the laws of fluid pressure to distribute input forces to one or more output lines.
Proportioning valves are frequently used in cars and other road vehicles to reduce the brake fluid pressure to the rear brakes. Due to weight distribution during heavy braking, more pressure is needed for front brakes. A proportioning valve reduces the pressure in the hydraulic lines to the rear brakes relative to that supplied to the front brakes during this heavy braking.
See also
[edit]References
[edit]- Fundamentals of Automotive Technology: Principles and Practice. Jones & Bartlett Publishers, Aug 1, 2013 pg. 1013