Quantcast Governor (Distributor Spinner Controlled)

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: Governor (Distributor Spinner Controlled)
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
Secondary Throttle Operation
Up
TM-5-4210-230-14P-1 Aerial Ladder Fire Fighting Truck Manual
Next
Figure 21  Governor Operation Below Governed Speed
TRUCK GROUP SERVICE MANUAL TM 5-4210-230-14&P-1 GENERAL Two   calibrated   bypass   jets   in   the   vacuum   passages meter the vacuum from the venturi and the manifold to provide the  correct  balance  for  proper  operation  of  the  governor.    At speeds  below  governing  RPM  this  vacuum  is  weakened  by  air bleeding through the governor valve in the governor spinner so that no premature governing action will occur. Filtered   air   from   the   carburetor   air   cleaner   enters   the governor system through a passage in the main body and then into the governor vent tube.  The air flows through an air line to the   housing   enclosing   the   governor   rotor   or   spinner   valve, located in the distributor. A   combination   of   low   pressure   from   the   venturi   and manifold   transmitted   through   the   governor   system   passages draws  the  air  past  the  governor  valve  and  through  another  air line to the throttle actuating unit on the carburetor. In the controlling unit centrifugal force acting on the rotor, which has kept pace with engine speed, overcomes the tension of the valve spring and tends to close the governor valve when governing  speed  is  reached.    This  greatly  restricts  the  amount of air bleeding through to the diaphragm on the carburetor, thus allowing the combined venturi and manifold pressure differential to  operate  the  diaphragm.    As  the  pressure  differential  across the  diaphragm  increases,  the  diaphragm  moves  the  governor lever  against  the  tension  of  the  governor  spring  to  close  the throttle plates. The     governed     engine     speed     is     held     constant     by centrifugal  force  on  the  valve  balanced  against  the  tension  of the valve spring.  Any slight change in engine speed due to load variation  will  cause  the  governor  valve  to  react  immediately, either   increasing   or   decreasing   the   amount   of   air   bleeding through the governor valve orifice.  A change in the amount of air   bleed   will,   in   turn,   cause   an   instant   response   from   the diaphragm to increase or decrease the throttle plate opening. When  the  accelerator  is  released,  control  is  taken  from the governor by the external throttle lever and the return spring in  the  accelerator  pedal  linkage  closes  the  throttle  plates  to bring the engine to any desired lower speed. A secondary control valve is used in conjunction with the governor.  The purpose of the secondary control valve (Figures 23   and   24)   is   to   close   the   secondary   throttle   plates   when governed   speed   is   reached,   so   that   the   engine   cruises   at governed   speed   operating   only   the   primary   venturis.      The secondary control valve is operated by governor vacuum acting upon  the  control  valve  diaphragm.    Below  governed  speed  air flow    through    the    governor    ("spinner")    valve    weakens    the vacuum    acting    upon    the    control    valve    diaphragm.        The diaphragm   spring   holds   the   valve   closed   against   its   seat. Primary  venturi  vacuum  acting  on  the  secondary  diaphragm controls    position    of    the    secondary    throttle    plates.        When governed  speed  is  reached  and  the  governor  ("spinner")  valve closes  (restricting  the  air  flow),  increased  vacuum  moves  the secondary   control   valve   diaphragm   compressing   the   valve spring  and  opens  the  valve.    This  permits  a  flow  of  fresh  air through the valve into the secondary diaphragm chamber.  The flow   of   air   weakens   the   vacuum   acting   on   the   secondary diaphragm   and   allows   the   diaphragm   spring   to   close   the secondary throttle plates. CGES-125-T  Page 13 PRINTED IN UNITED STATES OF AMERICA

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

Integrated Publishing, Inc.
6230 Stone Rd, Unit Q Port Richey, FL 34668

Phone For Parts Inquiries: (727) 493-0744
Google +