Quantcast Secondary Throttle Operation

Order this information in Print

Order this information on CD-ROM

Download in PDF Format

     

Click here to make tpub.com your Home Page

Page Title: Secondary Throttle Operation
Back | Up | Next

Click here for a printable version

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Combat
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
USMC
   
Products
  Educational CD-ROM's
Printed Manuals
Downloadable Books
   

 

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Back
Deceleration  Throttle  Modulator  System  -  1973  California and 1974 thru 1980 Federal Vehicles Over 6000 Lbs.  GVW
Up
TM-5-4210-230-14P-1 Aerial Ladder Fire Fighting Truck Manual
Next
Governor (Distributor Spinner Controlled)
TRUCK GROUP SERVICE MANUAL TM 5-4210-230-14&P-1 GENERAL Figure 18  Deceleration Throttle Modulator System (Typical) 1.  To Intake Manifold 2.  Engine Speed Sensor Unit 3.  From Ignition Switch 4.  Solenoid Vacuum Valve 5.  Throttle Modulator Secondary Throttle Operation The  secondary  throttle  plates  are  operated  by  a  spring- loaded diaphragm which is controlled by vacuum from the right primary  venturi  (Fig.  19  and  20).    The  secondary  diaphragm spring tends to hold the secondary throttle plates closed. When engine   air   requirements   approach   the   capacity   of   the   two primary   venturis,   increased   vacuum   from   the   right   primary venturi   moves   the   secondary   diaphragm,   compressing   the diaphragm   spring   and   opening   the   secondary   throttle   plates (Fig. 20).  As the secondary throttle plates open, the secondary fuel system begins to discharge fuel and the engine is supplied by all four carburetor venturis.  When engine speed is reduced, primary  venturi  vacuum  acting  upon  the  secondary  diaphragm is    lessened,    and    the    diaphragm    spring    starts    closing    the secondary throttle plates.  When the primary throttle plates are fully   closed,   the   secondary   throttle   plates   are   held   closed mechanically by design of the secondary connecting rod. Governor (Distributor Spinner Controlled) Internal Vacuum Type 4150G A  vacuum  operated  engine  speed  governor  (Figures  21 and  22)  is  incorporated  on  the  carburetor  as  a  positive  means of  controlling  engine  speed.    The  governor  contains  a  throttle- actuating  mechanism  attached  to  the  primary  throttle  of  the carburetor  through  an  overriding  clutch.    The  throttle-actuating mechanism consists Figure 19  Secondary Throttle Operation (Low Speed or Light Load) 1.  Secondary Diaphragm 3.  Secondary Throttle Chamber Plate 2.  Diaphragm Spring Holds Throttle Plate Closed Figure 20  Secondary Throttle Operation (High Speed or Heavy Load) 1.  Increased Vacuum Moves Diaphragm Opening Secondary Throttle Plates 2.  Secondary Throttle Plate of  a  diaphragm  assembly,  governor  spring  and  governor  lever assembly.    Below  governing  speeds  the  operator,  through  a simple    clutch    arrangement    on    the    throttle    body    of    the carburetor,   controls   the   throttle   body   of   the   carburetor   and throttle  plates  in  the  usual  manner.    When  governing  speed  is reached, a combination of venturi and manifold vacuum acts on the governor diaphragm to close the throttle plates. CGES-125-T  Page 12 PRINTED IN UNITED STATES OF AMERICA

Privacy Statement - Press Release - Copyright Information. - Contact Us - Support Integrated Publishing

Integrated Publishing, Inc.