# bs2

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Derived
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general considerations

Brief description:                  Name of the solution:

Drawing No:

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Brief description:                                          Name of the solution:
New chapter only looking for complete mass balance
Drawing No: 0.1
All rotary motions are balanced with counterweights on
the crankshaft!
Creator:
This chapter only discusses oscillatory mass balance of
1st and 2nd order
Date:
Derived
Critical / Info needed:      Functional                                                                                                                                                                                                                                                              from No:

decomposition                                                                                                                                Mass balance
(morphological
principal)              Support 1st order                                                                                                            Support 2nd order

Support position of mass balance
Support position of mass balance

Support motion of mass balance
Support motion of mass balance
Transmit from what

Transmit from what
Transmit with what

Transmit with what
Brief description:                                                                           Name of the solution:

This is just are very simple decomposition to                                          Drawing No: 0.2
come up with different possibilities
Creator:

Date:
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Mass balance
principals to produce mass forces

• rotating mass (shaft)
• oscillating mass (linear moving mass)

Brief description:                                   Name of the solution:

Drawing No: 0.3

Creator:

Date:
Derived
Critical / Info needed:          Function: Position First Order         from No:

In this case: constraint: using shafts!
Opposite
forces
always have            1
to be on one
line
otherwise
they will
initiate a
moment                                                       3
2

4

Brief description:                    Name of the solution:

Drawing No: 0.3

Creator:

Date:
Derived
Critical / Info needed:        Function: Position Second Order              from No:

In this case: constraint: using shafts!

1            Mass
balancing
shaft
crankshaft

3

2

4

Brief description:                    Name of the solution:

Drawing No: 0.4

Creator:

Date:
Derived
Critical / Info needed:       Vertical forces cancelled by weight on                See next slide for our     from No:
crankshaft and horizontal forces created by that
weight canceled by the other two shafts?             interpretation of design B

•this is only a general
where to place the
•in our understanding
B would be much
better because we
have only two
additional masses (2 x
mosc /2)

Brief description:                                                     Name of the solution:

Drawing No: 0.5

Creator:

Date:
Derived
Critical / Info needed:                                                                                       from No:

Mass balance of the oscillating forces on the crankshaft with an additional shaft to
balance horizontal forces

2nd order?
Unwanted horizontal component
We can combine this
solution with another for                                                               More mass to balance vertical
2nd order.                                                                            oscillating forces
this could work?

Wanted vertical component of the centrifugal force

Solution: additional shafts                               Shafts rotating counterclockwise, to
compensate horizontal forces.
Additional vertical forces will be
eliminated by the shafts themselves
(rotating with different direction).

Brief description:                                              Name of the solution:    Make it complicated

The difference would be not to balance the vertical          Drawing No:
0.5.1
forces with the extra shaft. The background is that you
may vary the counterweight on the crankshaft for each       Creator: USA
test without disassembling the whole mass balance
Date: 2/7/00
Derived
Critical / Info needed:   shaft 2 should                        Fv1       F1            from No:

be up here to
eliminate the
It looked like the           moment                        1             Fh1   Fv2
way you had B
drawn that you were
creating a horizontal
force to the right. Is                                                           Fv1
that what you
intended or is this
drawing correct?                                                        Fh2      Fh1
F2             Fv2

F=0
-Fc+Fv1+Fv2=0
Fh2
-Fh2+Fh1=0
2

Fc                                             Fc

Brief description:                                Name of the solution:

Drawing No: 0.5.2

Creator:

Date:
Derived
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Support motion of mass balance (1st order)
Function: Transmit from what

• 1 use motion of crankshaft
• 2 use motion of camshaft
• 3 use external device
• 3.1 hydraulics
• 3.2 electrical engine
• 3.3 pneumatics
• 3.4 electrical field forces
• 3.5 magnetic field forces
• 4 use motion of 2nd order balancing system

Brief description:                                         Name of the solution:

Drawing No: 0.6

Creator:

Date:
Derived
Critical / Info needed:                                                          from No:
Support motion of mass balance (2nd order)
Function: Transmit from what

• use motion of crankshaft
• use motion of camshaft
• use external device
• hydraulics
• electrical engine
• pneumatics
• electrical field forces
• magnetic field forces
• use motion of 1st order balancing system

Brief description:                                        Name of the solution:

Drawing No: 0.7

Creator:

Date:
Derived
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Transmit with what (solutions for both orders!)

• direct (positive connection(=Formschluß? formfit)) Some kind of part lock)
• chain
• gear
• rods
• belt
• excenter
• friction
• wheel
• belt
• fluid friction
• oil circuit with two pumps

Brief description:                                           Name of the solution:

Drawing No: 0.8

Creator:

Date:
Derived
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Oscillating Forces
•1st order: produced by acceleration/retardation
of piston and con-rod in vertical direction
(direction of cylinder-liner)
•2nd order:produced by acceleration/retardation
of con-rod in horizontal direction; dependent on
F2nd order             double crankshaft-speed because of
mathematical model
F1st order

In our opinion, these
are rotating forces.
Oscillating forces are
always in one
direction (vertical in
this case).

Brief description:           F1st order   Name of the solution:

Drawing No: 0.9
F2nd order
Creator:

Date:
Derived
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Brainstormed solutions
(based on systematic approach!)

Brief description:                     Name of the solution:

Drawing No:

Creator:

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Derived
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• Decreases only
natural frequencies
(Mass forces remain
the same)

Brief description:         Name of the solution:    S-Class-block

Drawing No:        1.1

Date:   02/03/00
Derived
Critical / Info needed:                                         from No:

•Not avoiding only
reducing mass forces

dampers

Brief description:         Name of the solution:    Dampers

Drawing No:        1.2

Date:   02/03/00
Derived
Critical / Info needed:                                                from No:

•Only for oscillating
forces
•rotating forces have
to be compenstaed by
counterweights
•yes, thats absolutely
right; just one thing:
I don‘t want to use
the camshaft which is
already in an engine,
it ment to be
Does the camshaft
induce a vibration
Is this the whole engine
equal and opposite
or only part of the engine
to the engine
vibration to cancel
it out?

Brief description:         Name of the solution:        camshaft 2000

Drawing No:        1.3

Creator:   Team Munich

Date:   02/08/00
Derived
Critical / Info needed:                                                   from No:

•Only for oscillating
Different strokes for different folks!
forces
•rotating forces have
to be compenstaed by
counterweights                                       General Question: Is it ok to
balance the vibrations of the
whole engine or should we
concentrate on balancing
vibrations inside the engine?
Part of the need to balance
vibrations is to help the
measuring systems. Are
there measuring systems
inside the engine that would
still experience vibrations in a
design like this one?

Brief description:         Name of the solution:           hydro pulser

Drawing No:        1.4

Creator:   Team Munich

Date:   02/08/00
Derived
Critical / Info needed:                                   from No:

mass balance of
rotating mass forces

Brief description:                 Name of the solution:

Drawing No:

Creator:

Date:
Derived
Critical / Info needed:                                        Con-Rod                          from No:

•Compensates
only rotary mass
forces

Could also be
used to balance
1st order(~50%)

Counterweight

Brief description:                                   Name of the solution:    2 Counterweights

Different counterweights to allow varying      Drawing No:        2.1

Date:   02/03/00
Derived
Critical / Info needed:                                        Con-Rod                        from No:

stress of crankshaft

Counterweight

Brief description:                                   Name of the solution:   1 Counterweight

Different counterweights to allow varying      Drawing No:    2.1.1

Date:   02/03/00
Derived
Critical / Info needed:              Con-Rod                          from No:

Excentric
Counterweight

Brief description:         Name of the solution:   Counterweight on Crankshaft

Drawing No:    2.1.2

Date:   02/03/00
Derived
Critical / Info needed:                                        Con-Rod                         from No:

Won’t this add only
weight to the
conrod?                                                                               done

That´s right.

Counterweight

Brief description:                                   Name of the solution:    Compensating Con-rod

Different counterweights to allow varying      Drawing No:        2.2

Date:   02/03/00
Derived
Critical / Info needed:                                                                                from No:

•Compensates only                                                                                       done
rotating forces
•Easily combined
with compensation of
oscillating forces
Crankshaft axis
Counterweight
Could be a good                                           a
idea with some of
the variable stroke
ideas … when you
change the crank
also change the
counterweight                                                                    Crank pin

Brief description:                                        Name of the solution:    Variable counterweight-radius

Drawing No:        2.3
Mass of counterweight remains the same only a changes

Date:   02/03/00
Derived
Critical / Info needed:                                                                        from No:

counterweight

Brief description:                                  Name of the solution: Rotary club balance

Compensation only of rotary mass forces   Drawing No:        2.4

Date:   02/03/00
Derived
Critical / Info needed:                                   from No:

mass balance of
oscillating mass forces
1st order

Brief description:                 Name of the solution:

Drawing No:

Creator:

Date:
Derived
Critical / Info needed:                                                                                 from No:

Counterweights
Counterweights

ω                                                 Balance of oscillating
forces 1st order
ω

Balance of rotary forces

Brief description:                                        Name of the solution: Lancaster for Daimler-Chrysler

No compensation of oscillating mass forces 2nd degree   Drawing No:        3.1

Date:   02/03/00
Derived
Critical / Info needed:                                                  from No:

This is probably why
two gears are used
on the crankshaft                                              Engine enclosure

crankshaft

Gears

Brief description:         Name of the solution: Daimler-Chrysler with gears

Drawing No:    3.1.1

Date:   02/08/00
Derived
Critical / Info needed:                                                     from No:

•Direction of
rotation of shafts
important? We think                                      Engine enclosure
it is not. What do you    Rotate in same direction
think?
•Problems with
durability of belts?

Shafts must rotate
in opposite
directions to
cancel horizontal                                       Belts/Chains
forces

Brief description:           Name of the solution: Daimler/Chrysler with belts/chains

Drawing No:    3.1.2

Date:   02/08/00
Derived
Critical / Info needed:                                                                                    from No:   7

The writing is hard
to read, so we don´t
understand. Maybe
Americans have
better eyes because
of the vitamin D in
the cheeseburgers

Carrots from
Jonathon’s garden

Isn’t this the same
principle as drawing
A on 0.5?

Brief description:                                                Name of the solution:    Happy new gear
•If we want to compensate the mass forces of 1st order with
an additional mass mosc1 at the crank shaft, we have to          Drawing No:        3.2
eliminate the horizontal force this mass creates, e.g. through
two shafts that rotate in opposite direction.
Creator:   Team Munich
•This will be compatible with other solutions for 2nd order as
well.
Date:   02/08/00
Derived
Critical / Info needed:                                                                             from No:

Uses only one
two
Possible to
shafts for 2nd            100% rotating
order.
and 50% oscillating

Why is it
expired, it
seems good!

Produces moment
of 2 gears

Brief description:                                     Name of the solution:
Use weight on crankshaft to eliminate 50% of 1st
order vibrations and another shaft to eliminate the   Drawing No: 3.3
other 50% … could easily be adopted to add 2nd
order support                                         Creator:   Stolen from some hard working American guy /
Clemson
US Patent # 04800852 (expired)                        Date:   02/08/00
Derived
Critical / Info needed:                                                                                                              from No:

•Oscillating forces 1st
order compensated
•lubrication
•Second order not
compensated ?
•If the movement of the
lever and the
counterweights are a
strict Sinus-curve then
second order mass
forces are not
compensated, but if
the movement is like
the piston (please refer
to the literature) then
it would be a complete
This solution does not compensate oscillating forces 2nd order only first order is compensated refer to picture No.0.9.
balance for Fosc
For compensation of second order an additional guaideline has to be provided in perpentigular position.

Brief description:                                                      Name of the solution:                       guideline

Drawing No:          3.4.1.

Creator:        Team Munich

Date:     02/08/00
Derived
Critical / Info needed:                                                from No:

•Only oscillating 1st
order, second order
possible using                    This won´t work smoothly!!!
2
•this solution is ment
to be similar to 3.4.1
but with the
difference that the
mechanism with the
guide is in the center
of the crankshaft =>

Brief description:         Name of the solution:          guideline 2

Drawing No:    3.4.2

Creator:   Team Munich

Date:   02/08/00
Derived
Critical / Info needed:                                                       from No:

mass balance of
oscillating mass forces 2nd order
(also maybe 1st and rotating mass-balance)

Brief description:                              Name of the solution:

Drawing No:

Creator:

Date:
Derived
Critical / Info needed:                                                                            from No:

Advantages to the shaft
design:
Possible to eliminate close                                     Balance of oscillating forces 2nd order
to 100% of vibrations
Counterweights   2ω
oil temperature rises
(friction)                                                             2ω              Counterweights

design:                                   ω                                      Balance of oscillating
Need a lot of space                                                                forces 1st order
ω
Higher weight
Friction
High revolutions (12,000                                                         Balance of rotary forces
rpm in 2nd order shafts)
Higher forces in the
engine (because gasforces
are not compensated by
oscillating forces)
More complicated design

Brief description:                                  Name of the solution:       Lancaster-balance

Complete mass balance of one-cylinder engine   Drawing No:     4.1.

Date:   02/03/00
Derived
Critical / Info needed:                                                from No:

•Direction of
rotation of shafts
important? We think
Engine enclosure
it is not. What do
you think?We mean
relatively to the
crank shaft, not to
each other!

It doesn’t matter
which gear turns
in which direction                                   Gears
as long as they
move in opposite
directions and
cancel the vertical
forces of the
crankshaft

Brief description:         Name of the solution: Lancaster-balance with gears

Drawing No:    4.1.1

Date:   02/08/00
Derived
Critical / Info needed:                                                from No:

•Direction of
rotation of shafts
important? We think
it is not. What do you                           Engine enclosure
think?
•Problems with
durability of belts??

Same problem as
3.1.2 (wheels turn
in the same
direction and don’t                                   Belts/Chains
eliminate
horizontal forces)

Brief description:         Name of the solution: Lancaster-balance with belts/chains

Drawing No:    4.1.2

Date:   02/08/00
Derived
Critical / Info needed:   1st order force generated through:          Rotating shaft       from No:
2nd order force generated through:          Rotaing shaft
The red pair has to       Position of 1st order system:               Above (parallel)
Position of 2nd order system:               Under (parallel)
move in opposite         Motion generating device (1st order)        Crankshaft
directions to          Motion generating device (2nd order)        Shaft first order
Motion transmitting device (1st order)      Gear
themselves!            Motion transmitting device (2ndorder)       gear
Otherwise there
are horizontal
forces or the
vertical would
compensate each
other.
The same for the
blue gears.
If you use 2 gears
on the crankshaft
like 4.1 you can
make the 2 shafts
turn in opposite
directions
Brief description:                                                  Name of the solution:

Drawing No: 4.1.3.

Creator:

Date:
Derived
Critical / Info needed:                                         from No:
w
w

We should keep the
w
variation in mind, it
could be very                                       One of the shaft has to
turn the other way
useful!                                                around

Brief description:         Name of the solution:

Drawing No: 4.1.4

Creator:

Date:
Derived
Critical / Info needed:                                                                           from No:

2nd order forces
are horizontal
forces!

Oscillating forces
1st order

2w

2w

Brief description:                                 Name of the solution:        Happy new gear 2
complete mass balance                           Drawing No:        4.2

Creator:   Team Munich

Date:   02/08/00
1st order force generated through:         Liner moving mass     Derived
Critical / Info needed:   2nd order force generated through:         Rotaing shaft         from No:
Position of 1st order system:              Under
Position of 2nd order system:              Under (parallel)
Motion generating device (1st order)       Pneumatic cylinder
Blue shafts            Motion generating device (2nd order)       Crankshaft
Motion transmitting device (1st order)     rod
have to rotate          Motion transmitting device (2ndorder)      gear
in different
directions

Thermodynamic
influence

Piston is only for
mass balance …
there is no
combustion

Brief description:                                                  Name of the solution:

Drawing No: 4.3

Creator:

Date:
Derived
Critical / Info needed:                                                                    from No:

•Camshaft typically
rotates at half the
speed of the
crankshaft
•Balance of the
camshaft?
•Complete
balanced (Fosc and                                                           This way is better for
Frot) engine due to                                                         mass balance but that
180° Crankshaft;                                                             doesn’t matter … we
with 2 Cylinder                                                             only have one cylinder,
We shouldn´t use                                                                  remember?
the camshaft                                                    This should be drawn
differently, the 2 cylinders
combust at the same time
because it´s a four-stroke-
engine!
Brief description:                            Name of the solution:
Tell this guy!
Uses motion of crankshaft and camshaft to   Drawing No: 4.4.1
balance mass
US Patent # 04651689                        Creator:   Stolen from some hard working Austrian guy /
Clemson
Date:   2/8/00
Derived
Critical / Info needed:                                               from No:

•balance oscillating
forces by using a
double cylinder; then
second cylinder is
only for balancing
(=> not fired)                                            Doubles mass forces!
(oscillating first order and
rotating)
Influence on
thermodynamic?
Piston is only for
mass balance …
there is no
combustion

Lots of mass
moments!

Brief description:         Name of the solution:   TWIN Engine

Drawing No: 4.4.2

Creator:

Date:
Derived
1st order force generated through:           Liner moving mass          39
Critical / Info needed:                                                                        from No:
2nd order force generated through:           Rotaing shaft
Will                  Position of 1st order system:                Above ?????
Position of 2nd order system:                Under (parallel)
produce a                Motion generating device (1st order)         Crankshaft
moment                  Motion generating device (2nd order)         Crankshaft
!!!!                  Motion transmitting device (1st order)       rod
Motion transmitting device (2ndorder)        gear
If there are 2 conrods
(moving in opposite
directions), you won’t
need the two shafts, it
will be balanced already
How is the piston
arranged on the
crankshaft?There are two
possibilities see scetch!!

Blue shafts have to
rotate in different
directions
Thermodynamic
influence

Brief description:                                                      Name of the solution:

Drawing No: 4.4.3

Creator:

Date:
Derived
Critical / Info needed:                                                           from No:

Additional ideas which don´t fit to one of the topics

Brief description:                         Name of the solution:

Drawing No:

Creator:

Date:
Derived
Critical / Info needed:                                                from No:

• No info needed it
seems to work
•only 2nd order; 1st
order balanced by
the 4 cylinder
engine itself

Brief description:         Name of the solution:    BMW Solution (318 i) E46

Drawing No:        5.2

Creator:       BMW

Date:   02/03/00
Derived
Critical / Info needed:                                                                 from No:

Why not use the
boxer engine !!!

Using a BMW M52 6-cylinder-engine for thermodynamic testing
(12-cylinder too expensive)
advantage: using series parts

Using a one-cylinder-
boxer-engine is
completely new!!!!

It also would be
making barking
noises!

Brief description:                             Name of the solution:       Best Engine

Drawing No:         5.3

Date:   02/03/00
Derived
Critical / Info needed:                                           from No:

oscillating forces ? Is
this a solution for mass-
balance
• 6000 rpm are not
possible using
hydraulic power
•It is only a general
idea

Brief description:          Name of the solution:    NoFear 2000

Drawing No:        5.4

Creator:   Team Munich

Date:   02/08/00
Derived
Critical / Info needed:                             from No:

Brief description:         Name of the solution:
FEV
Drawing No: 5.5

Creator:

2/9/00
Date:
Derived
Critical / Info needed:                           from No:

Brief description:         Name of the solution:

Drawing No:
5.6
Creator:

2/9/00
Date:

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 views: 4 posted: 12/9/2011 language: pages: 50