Let us introduce you to the Excel based software.
Bimotion is currently the dominating software for passive engine tuning,
i.e. time-area and parameter controlled. The program generates state of the
art pipes with respect from exhaust- and transfer ports time-area and
shape design. Since the exhaust port and the exhaust pipe should
be regarded as one unit, this is the optimum user friendly way to do it with full control. The
ports should be mapped on paper and measured. The data are then entered
into the program and converted for 1D flow calculation.
The unique Bimotion features are:
* Arbitrary port shapes
* Dual exhaust port
* Auxiliary exhaust ports
* Port mapping translation
* Exhaust pipe and exhaust port dependence
* 3 to 8 ports
* Blair Pipe (Pre-parameterized 5-coned pipe)
* Custom pipe (2 to 6-coned pipe)
* Comparison of 2 exh. port sets (e.g. stock - tuned)
* Height- and width port offsets for fast scenario analysis
* Inside parameter recommendations dependent on
engine size and tuning degree based on massive
* Port layout development plot
* dxf cad drawings output on developed cones,
hydro form and roll form.
* Language translation file import
* 4 years free support and updates.
* Portable, no hardware lock
Windows Vista SP2 or later with
installed MS Excel 2003 (SP3) - 2016
except any trial-, student-, or cloud version
program is divided into different pages that are accessed from the 'Pages'
button. Different program sections makes the actual dimensioning work
more efficient and less time is spent on searching after
parameters in the program.
Two identical sections ('Exhaust Port #1' and 'Exhaust Port #2')
are intended for one modified configuration (#1) and one
original configuration (#2). These two pages are transparent to each
other in red and blue color, see below.
'Transfer Ports' handles 2-5 scavenging ports shape design.
'Custom Pipe' is a fully parametric flexible pipe model. Blair
Pipe' is an auto-generated racing pipe with predefined built in
dependencies for state of the art race engines.
'Port Mapping' is a table set to convert a paper mapped measure
into a projected flow measure.
'Development Plot' is page where a developed plot can be printed
for all ports or selected.
'About...' page connects and shows the latest released version,
online manual access, etc.
different pages are:
Exhaust Port, one
of two identical sheets. Two transparent configurations with
Transfer Ports, 2 - 5 ports,
a flexible model with built in parameter recommendations.
a pre-parameterized 5-coned pipe for race engines.
Port layout plot. Two exhaust port configurations are overlaid for
comparison in this
General Pipe manage pipes with coned header, 3-stage
diffusor and 2-stage baffle for which any custom dimensions can be used.
The user are guided by a lot of detailed recommendations from well known
designs in real life. This works more or less as a 'pipe lab' page.
The other exclusive pipe model is suggested
by prof. G.P Blair (QUB). This theoretically elegant pipe is described in the book "Design & Simulation of two-stroke engines"
and is also designed from a time-area designed exhaust
port. The program uses
the mathematics and recommendations described in chapter 6 in the book.
and transfer ports shape design are made in a
table and plotted in real time in a chart. For
a chosen tuning degree, the port should be designed to reach the time-area target (decided by
the tuning degree).
|The exhaust port can be mapped inside
the cylinder on a piece of paper, developed, measured, and entered in a column
to be transformed
to the port shape in flow direction. The reverse can also be done, i.e.
adjust the port shape in flow direction and plot it as developed. The program
also produces manufacturing templates as sheet cone developments in the same time. Very
user friendly !!
The plots are changed in real time when values in green
cells are changed.
The modeling is very flexible with a
lot of options to view the ports in charts.
Read the KX500 case study and the manual for further insight in how
to calculate high performance 2-strokes with Bimotion software!
the manual, click a flag !
function also include dxf cad drawings output of exhaust pipes !
- Cut out template for hydro forming
- Developed cones cut out templates for roll forming
Customized compensation for TIG weld seam width and sheet thickness.
US $ :249.00
Order is to be placed from
Contact in the menu.
Please specify program and Excel version
(2003, 2007, 2010-2016 and 32- or 64 bit OS)