Orifices

Local flow restrictions of fixed and variable size

Use these blocks to orifices in the hydraulics (isothermal) domain.

Simscape Blocks

Annular Orifice	Hydraulic variable orifice created by circular tube and round insert
Fixed Orifice	Hydraulic orifice with constant cross-sectional area
Fixed Orifice Empirical	Fixed hydraulic orifice based on empirical data
Fixed Orifice with Fluid Inertia	Fixed hydraulic orifice accounting for flow inertia
Journal Bearing Pressure-Fed	Hydraulic portion of pressure-fed journal bearing
Orifice with Variable Area Round Holes	Hydraulic variable orifice shaped as set of round holes drilled in sleeve
Orifice with Variable Area Slot	Hydraulic variable orifice shaped as rectangular slot
Variable Orifice	Generic hydraulic variable orifice
Variable Orifice Between Round Holes	Hydraulic variable orifice at intersection of two holes

Featured Examples

Diesel Engine In-Line Injection System

An in-line multi-element diesel injection system. It contains a cam shaft, lift pump, 4 in-line injector pumps, and 4 injectors.

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ABS Open Loop Test Bench

A simple way of modeling of the anti-lock braking system (ABS) and using it with the manual braking components. The model simulates for the open loop ABS and shows the response of the pressures achieved in the caliper disc brakes. This model can be utilized in sizing of the release valve, apply valve and accumulator for the hydraulic control unit of the ABS.

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