1D Simulation of Intake Manifold
Suppose you have to design a 600 cc engine, you have no data , how will you start. Benchmarking can help in this case. I took R6 specification and then did 1D Simulation as per my expectation of final power torque curve. Following parameters are not standard of R6, I have changed them based on my 1D Simulation - see other blog for Modeling and Simulation of throttle bore, diffuser, intake manifold, cylinder, timing, exhaust valve.
From Yamaha R6 Engine Specification and initial simulation iterations following parameters haven finalized for our final simulation:-
Description
|
Primary
Parameters
|
Ambient
Temp, Pressure
|
20°C,1atm
|
Throttle
Body
|
Bore
40mm,Idling 5°, WOT 85°,Shaft Dia 10mm
|
Diffuser
Convergent
|
L
250mm,Din 40mm to Dout 20mm,t 5mm, steel
|
Diffuser
Divergent
|
L
250mm, Din 20mm to Dout 60mm,t 5mm, steel
|
Intake
Plenum
|
Design1:
5 Liters, Design2: 3Li, Design3:1Li, Aluminum
|
Manifold
Runner
|
L
260mm,Constant Dia 40,t 5mm, Aluminum
|
Port
Length
|
50
mm, Dia 40mm to 35mm,t 10mm, Aluminum
|
Intake
Valve Dia
|
2Valves
, Dia 27mm
|
Intake
Valve Timing
|
IVO
39 °, IVC 66 °, Max Lift 8.5 mm
|
Cylinder
|
B/S
67/42.5mm,Cr 13,ConRod90.5mm
|
Exhaust
Valve Timing
|
EVO
64 °,EVC 24 °, Max Lift 7.7mm
|
Exhaust
Valve Dia
|
2Valves,
23mm
|
Effect of Plenum of Volume on Torque is
shown in below table. Initially very distinct value is chosen; for further
optimization incremental value for plenum volume will be analyzed.
Conclusion from Above Graph: -
2.8 Li Plenum volume gives smooth torque consequently now Runner Cross Section
variation will be simulated for 2.8 Liter plenum volume. Go to next article for simulation of runner.
