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Fuel economy analysis
Principle of Energy
Flow-Down Method
To improve fuel economy of your car, understanding of engine + T/M + vehicle interaction and control strategy (ECU, TCU) are very Important
Needs for sub-system
Subsystem technology
Needs for component technology
Components
Component technology development and optimization
Benefits of Energy
Flow-Down Method
Energy Flow-Down Method can analyze the fuel consumption and contribution of each component and ECU/TCU control data through systematic approach.
Client can have the whole view for the quantitative fuel consumption and contribution of each component.
Client can recognize the weak and strong points against target vehicle.
Client can understand how top maker optimizes every component and control data to improve fuel economy.
Client can make catch-up plan of short, mid, long term in the most efficient cost.
m
f
Q
LHV,f
=
Q
in-comb
+
Q
cool
+
Q
exh
+ P
pumping
+ P
ef
+ P
accessory
+ P
ei
+
P
td(A/T)
+ P
dd(A/T)
+ P
dtf
+ P
dti
+ P
R
+ P
A
+ P
Vi
+
Q
etc
The energy transferred to the next stage
The energy spent away at the current stage
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