Manuals through 2025 now available!
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LEMON is the spiritual successor to CHARM, I recommend you try it!
Link:
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Vacuum Restrictor: Description and Operation
This orifice-type flow restrictor (Fig. 1) is used in several emission calibrations to control the flow rate and/or timing inactions to the following emission component systems:
a.
EGR valve timing-opening and closing.
b. Part throttle spark advance
c. Purge system
d. Thermactor system
