Project 1

UDDS cycle is the EPA Urban Dynamometer Driving Schedule (UDDS) is commonly called the "LA4" or "the city test" and represents city driving conditions. It is used for light duty vehicle testing.

SUMMARY: Yellow Colour cuve is the desired drive cycle and blue colour curve is the actual velocity achieved both curves very close to each other it means performance of vehicle is fine.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Skill-Lync -> Hybrid Drives Development
% Project 1 - Conventional Vehicle Model
% By - PRADEEP MRIDHA 

% Description:

%% Initialization File
% Initialization file for loading the variables for the Conventional vehicle simulation model

%% Vehicle Parameters
M = 1500;       % Vehicle weight [kg]
Cr = 0.015;     % Rolling resistance coefficient
Rw = 0.35;      % Rolling radius [m]
Cd = 0.33;      % Drag coefficient
Af = 2;         % Frontal area [m2]
rhoa = 1.225;   % Air density [kg/m3]
Vwind = 0;      % Wind velocity [kmph]
g = 9.81;       % Gravitational acceleration [m/s2]
theta = 0;      % Slope [deg]
myu_road_tire = 1; % Coefficient of friction between tire - road interface

%% Powertrain Parameters 
FDR = 3.73;                         % Final Drive Ratio / Diff Ratio
DiffEff = 0.99;                     % Differential efficiency (assumed independent of operating conditions)

NumGear = 4;                        % Number of gears in transmission
TransGear = [1:NumGear];            % Transmission Gears
TransRatio = [3.06, 1.62, 1, 0.7];  % Corresponding Transmission ratios
TransEff = 0.90;                    % Transmission efficiency (assumed independent of operating conditions)

TC_SR = [0, .5, .6, .7, .8, .87, .92, .94, .96, .97, 1];   % Torque Converter Speed Ratio (Matlab default) -> TurbSpd/PumpSpd  
TC_TR = [2.232, 1.5462, 1.4058, 1.2746, 1.1528, 1.0732, 1.0192, 1, 1, 1, 1];   % Torque Converter Torque Ratio (Matlab default) -> TurbTrq/PumpTrq
TC_Cf = 1e-4 * [.72558, .66322, .63463, .59042, .51331, .4144, .29287, .22444, .12186, .04386, 0]; % Torque Converter Capacity Factor (Matlab default) -> PumpTrq/PumpSpd^2 [Nm/rpm^2]

load Vehicle_Data/Engine_data_1_9L_Saturn_95kW
load Vehicle_Data/Trans_Shift_map

%% Driver Parameters
Kp = 10;                    % P gain for driver PI model
Ki = 1;                     % I gain for driver PI model
Drive_Cycle_Select = 1;     % Drive cycle selection

% Drive cycle values in m/s

if Drive_Cycle_Select == 1
    load DriveCycles/UDDS;
    
elseif Drive_Cycle_Select == 2
    load DriveCycles/HWFET;
    
elseif Drive_Cycle_Select == 3
    load DriveCycles/FTP;
    
elseif Drive_Cycle_Select == 4
    load DriveCycles/US06;
    
elseif Drive_Cycle_Select == 5
    load DriveCycles/NEDC;
    
elseif Drive_Cycle_Select == 6
    load DriveCycles/WLTP;
 
end

time_end = cyc_time(end);
vel_end = cyc_vel(end);

Project1_ProcessingFile.m

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Skill-Lync -> Hybrid Drives Development
% Project 1 - Conventional Vehicle Model
% By - Ullekh Gambhira 

% Description:
% The following file is to used with the Initialization file and Simulink
% results for post-processing of the data.
% The file is incomplete, has some examples of how the data is imported
% into a readable format, data analysis and plotting examples.
% Based on the project task, use commands in a similar format as given
% below, to analyse the data and generate required plots.
% You can change variable names if desired

%% Post-Processing File
%  File for post-processing the Conventional vehicle simulation model data

%% Renaming variables
Time = out.tout;
Acc_Pdl = out.Acc_Pdl;          % Accelerator pedal [%]
Brk_Pdl = out.Brk_Pdl;          % Brake pedal [%]
Gear_Cmd = out.Gear_Cmd;        % Transmission gear
Trans_In_Spd = out.Trans_In_Spd*30/pi;  % Transmission input speed [rpm]
Trans_Out_Spd = out.Trans_Out_Spd*30/pi;% Transmission output speed [rpm]
Eng_Trq = out.Eng_Trq;          % Engine brake torque [Nm]
Eng_Spd = out.Eng_Spd*30/pi;    % Engine speed [rpm]
Eng_Fuel_Consump = out.Eng_Fuel_Consumption;    % Engine fuel consumption [g]
Veh_Dist = out.Veh_Dist/1000;   % Distance traveled by vehicle [km]
Veh_Spd = out.Veh_Spd*18/5;     % Vehicle speed [kmph]


%% Data Analysis
Eng_Pwr = Eng_Spd.*pi./30.*Eng_Trq./1000;   % Engine brake power [kW]
rho_petrol = 0.7197;                    % Density of petrol [kg/L]
FuelinLtr=(Eng_Fuel_Consump(end)/1000/rho_petrol);
kmpl = Veh_Dist(end)/FuelinLtr;    % Fuel economy [kmpl] 

%% Plotting vehicle characteristics time trace
figure(1)
subplot(3,1,1)
hold on
grid on
plot(Time, Acc_Pdl, 'linewidth', 1, 'Color', 'black');
plot(Time, Brk_Pdl, 'linewidth', 1, 'Color', 'red');
ylabel('Pedal [%]')
xlim([0, Time(end)]);
legend('Accel','Brake');
subplot(3,1,2)
hold on
grid on
plot(Time, Trans_In_Spd, 'linewidth', 1, 'Color', 'black');
plot(Time, Trans_Out_Spd, 'linewidth', 1, 'Color', 'red');
ylabel('Speed [rpm]')
xlim([0, Time(end)]);
ylim([0, 6000]);
legend('Trans Input','Trans Output');
subplot(3,1,3)
hold on
grid on
plot(Time, Gear_Cmd, 'linewidth', 1, 'Color', 'black');
xlim([0, Time(end)]);
xlabel('Time [s]');
ylabel('Gear');

%% Plotting engine operating points on engine fuel map
figure('Name','Engine Operating Points');
hold on
grid on
title('Engine Operating Points','fontsize',12);
p1=plot(Eng_map_spd*30/pi,Eng_max_trq,'linewidth',2,'color','r');
p2=line([Eng_map_spd(end)*30/pi Eng_map_spd(end)*30/pi],[0 Eng_max_trq(end)]);
set(p2,'linewidth',1,'linestyle','--','color','k');
p3=line([Eng_map_spd(1)*30/pi Eng_map_spd(1)*30/pi],[0 Eng_max_trq(1)]);
set(p3,'linewidth',1,'linestyle','--','color','k');
[c,h] = contour(Eng_map_spd'*30/pi,Eng_map_trq,Eng_fuel_map');
clabel(c,h);
xlabel('Engine Speed [rpm]');
ylabel('Engine Torque [Nm]');
title('Engine Fuel Consumption Map [g/s]');
p4 = plot(Eng_Spd,Eng_Trq,'.','color','k');
legend([p1 p4],{'Max Curve','Operating Points'});
axis([Eng_map_spd(1)*30/pi Eng_map_spd(end)*30/pi 0 Eng_map_trq(end)]);

figure(3)
subplot (3,1,1)
plot(Time, Eng_Trq, 'color', 'r')
xlabel('Time')
ylabel('Engine Torque')
title('TIME Vs ENGINE TORQUE')
grid on
subplot (3,1,2)
plot(Time, Eng_Spd, 'color', 'g')
xlabel('Time')
ylabel('Engine speed')
legend('TIME Vs  ENGINE SPEED')
grid on
subplot (3,1,3)
plot(Time, Eng_Fuel_Consump, 'color', 'b')
xlabel('Time')
ylabel('Engine Fuel Consumption')
legend('TIME Vs  Fuel Consumption')
grid on



figure(4)
subplot (2,1,1)
plot(Time, Veh_Dist, 'color', 'b')
xlabel('Time')
ylabel('Vehicle Distance')
title('Time Vs Vehicle Distance')
grid on
subplot (2,1,2)
plot(Time, Veh_Spd, 'color', 'r')
xlabel('Time')
ylabel('Vehicle Speed')
title('Time Vs Vehicle Speed')
grid on

GRAPHS

FIGURE -1

SUMMARY: Above Graphs are the Braking, Switching Gear, Speed output and Acceleration in city condition with repect to Time.

FIGURE -2

SUMMARY: RED LINE IS THE MAX CURVE LINE AND BLACK COLUR IS THE OPERATING POINTS. OUR OPERATING POINTS ARE BELOW MAX CURVE LINE IT SEEMS MODEL IS WORKING FINE.

SUMMARY: The following Graphs are the Torque, Speed and fuel Consumption in city condition with respect to time.

SUMMARY: The following Graphs are the Speed and Distance Travel in city conditions with respect to time.

SUMMARY: Above Graphs are the Braking, Switching Gear, Speed output and Acceleration in city condition with repect to Time.

SUMMARY: RED LINE IS THE MAX CURVE LINE AND BLACK COLUR IS THE OPERATING POINTS. OUR OPERATING POINTS ARE BELOW MAX CURVE LINE IT SEEMS MODEL IS WORKING FINE.

SUMMARY: The following Graphs are the Torque, Speed and fuel Consumption in city condition with respect to time.

SUMMARY: The following Graphs are the Speed and Distance Travel in city conditions with respect to time.

Symulink Model Scope for Driver Block ( HWFET cycle)

SUMMARY: Yellow Colour cuve is the desired drive cycle and blue colour curve is the actual velocity achieved both curves very close to each other it means performance of vehicle is fine.

• In UDDS Cycle vehicle can be travelled to distance of 12.74 KM by consuming 0.6 lit of fuel.
• In HWFET Cycle vehicle can be travelled to distance of 16.3 KM by consuming 1.01 lit of fuel.

  	Kmpl	Fuel in lit
  UDDS	12.74	0.6
  HWFET	16.3	1.01