Twin Pulse motors...
  • Register
  • Help
Results 1 to 5 of 5
  1. #1
    1000+ Posts Luca's Avatar
    Join Date
    Mar 2003
    Location
    Melbourne
    Posts
    1,335

    Default Twin Pulse motors...

    Anyone know anything about these?

    Advertisement

  2. #2
    Fellow Frogger! sproose16v's Avatar
    Join Date
    Mar 2004
    Location
    Sydney
    Posts
    263

    Default

    I think some Motor bikes have it or something, not too sure.....
    1989 BX 16 Valve Mk1 - SOLD (And Missed)
    http://www.bx16v.cjb.net
    1992 R32 GTSt Skyline

  3. #3
    Fellow Frogger! winnie's Avatar
    Join Date
    Mar 2004
    Location
    Melbourne
    Posts
    123

    Default

    Not exactly sure what you are refering to?
    GP bikes have experimented / used cylinder firing to alter the torque 'pulses' from the crank shaft.
    The theory being that it was easier to control rear wheel steer with a 'big bang engine' (2 of the 4 cylinders firing at once to give a torque pulse twice as large but both occuring in one engine rev the other crank rev would have negative torque) than with a 'screamer' engine (traditional cylinder firing even spaced torque pulses). The screamer engines had slightly more peak power and a few other minor advantages that were associated with better/simpler engine harmonics.

  4. #4
    1000+ Posts Luca's Avatar
    Join Date
    Mar 2003
    Location
    Melbourne
    Posts
    1,335

    Default

    This was my understanding....

    The smaller cross-sectional area of the multi cylinder allows a more effecient flow into and out of the chamber along with better flame front propagation and less reciprocating mass on each big end bearing. I would also presume that they won't be firing exactly in a v2 order, rather just offsetting the two that fire "together" by a number of degrees in order to reduce shock.

  5. #5
    Member Tim Tech's Avatar
    Join Date
    Jun 2004
    Location
    Orange NSW
    Posts
    36

    Default

    Not quite sure what your refering to?
    Are talking about how many cylinders fire at once and when they fire??

    There are two main types of firing sequences:
    Group fire: This is when all cylinders fire as a group at the same time whether or not that cylinder is on its firing stroke

    Sequential fire: This is when only individual cylinders fire when on their firing stroke

    Motorbike and cars can use either of these sequences.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •