Project 1

a] Aim 

1. Build the complete model of vehicle by using simulink model
2. Writing the scprit in matlab to load the all the variables required for runnning the simulink model.
3. Tabulate the fuel economy number for (kmpl) for UDDS and HWFET cycle.
4. plot the time trace for engine transmission input , transmission output and wheel speed on one plot 
5. plot the engine torque ,engine power , fuel rate and fuel consumption using subplot .
6. plot accelerator and brake pedel , gear command vehicle desired and actual speed,vehicle distance using subplot.
7. plot engine operating on the engine fuel map

Conventional vehicles 

The IC engine is the most popular power plant for motor vehicles. In the foreseeable future, it will still be the dominant vehicular power plant. In HEVs, the IC engine will also be the first selection as a primary power source. However, the operation of an HEV differs from that of a conventional motor vehicle. The engine in an HEV runs for a longer time at high power and does not require its power to be changed frequently. A specifically designed and controlled engine for hybrid vehicle applications has not been fully developed. In this chapter, the commonly used four-stroke (4S) IC engine and other types of engines, which can be possibly used in hybrid vehicles, such
as two-stroke (2S) engines, rotary engines, Stirling engines, and gas turbineengines, are reviewed

Energy perfomance of conventional Vehicle 

Indicated Work per Cycles and Mean Effective Pressure

The torque performance is usually evaluated by the gross work done in one
cycle, usually called gross indicated work, Wc,in. The gross indicated work
can be calculated by

Wc,in = int(area A) p dV −int(area B) p dV,

The mean effective pressure can be expressed in terms of torque as
mep (kPa) = 2πnRT (Nm)/Vd (dm3)

Mechanical Efficiency

Pig = Pb + Pf

Specific Fuel Consumption and Efficiency

 sfc = m˙ f/P 

Volumetric Efficiency

ηv = ma/ρa,iVd

Effort Flow variables, Information /control variables .

1. Effort - These are the inputs or driving forces that influence the behavior of a system. Effort variables are usually the quantities that individuals or entities can directly control or manipulate to affect the system's behavior. They represent the actions or efforts put into a system to cause changes. Example 1) Applied force in a mechanical system.2)Investment in an economic model. 3)Fuel input in a combustion engine.
2. Flow Variables-Flow variables represent the rates of transfer or movement of something within a system. They describe the movement or flow of resources, energy, or other quantities over time. Flow variables are often influenced by effort variables and influence the accumulation of stocks or other variables in the system.
3. Information/Control Variables-These variables pertain to the information available in a system or the control mechanisms governing the behavior of the system. Information variables influence decision-making and the control of effort and flow variables. They can also represent the feedback mechanisms used to regulate the system.

Matlab Script