Project 1
Project 1 deals with the development of a forward energy-based fuel consumption model of a conventional vehicle.
The main goal of this project is to get familiar with the modeling process, writing scripts in Matlab, modeling in Simulink, analyzing data and generating plots.
In this project, a typical midsize car with a 1.9L engine and a 4-speed automatic transmission is considered. Data is taken from ADVISOR data base developed by NREL, USA. Transmission shift map and controller is taken from Matlab/Simulink example database.
The model developed has the capability to simulate the vehicle on different drive cycles like UDDS, HWFET, FTP, NEDC, etc.
“Project1_InitFile.m” is a Matlab script used to load all the variables required for running the Simulink model and for post-processing. The drive cycle selection is also done here. Before running the Simulink
vehicle model, run this initialization script.
“Project1_VehicleModel.slx” is the Simulink model of the vehicle. It is modeled using a ‘Driver’ block, which is a basic PI controller that generates accelerator and brake pedal outputs to match the desired
and actual vehicle speeds. The ‘Controller’ block is the brains of the vehicle, representing the electronic controls units. Based on the driver inputs, it generates desired engine torque, desired transmission gear
and desired brake torque. These inputs are fed to the ‘Powertrain’ block which represents the drivetrain of the vehicle. It consists of an ‘Engine’ connected to the ‘Automatic Transmission’ through a ‘Torque
Converter’. The output of the transmission is connected to the ’Differential’, which powers the ‘Wheels’, that provides the tractive force for vehicle acceleration. The longitudinal dynamics of the vehicle along with the road load is represented in the ‘Vehicle Dynamics’ block. The solver selected is ode3 with a fixed step size of 0.01 sec.
After running this Simulink model, data from the model will be loaded in the Matlab workspace.
“Project1_ProcessingFile.m” is the Matlab script used to analyze this data and to generate plots. This script needs to be executed after the Simulink model data has been loaded into the workspace. Here we
rename the variables loaded from the model (if desired), do some basic post-process calculations and generate results and plots.
Task:
The task of this project is to compute the fuel economy numbers for the given vehicle (kmpl) on the urban cycle (UDDS) and highway cycle (HWFET). Also, to analyze and understand the vehicle operating
points in terms of engine speed, torque, transmission speeds, pedal positions, gear, distance traveled, etc.
To do that, the following steps need to be followed:
1) Load the Project1 folder as the Current Folder in Matlab.
2) Run the “Project1_InitFile.m” Matlab script.
3) The provided vehicle Simulink model “Project1_VehicleModel.slx” is incomplete. The engine and vehicle dynamics block contents have been deleted. Build the Simulink blocks by referring to the course lecture and example block images provided. You can run the model and analyze the results using a ‘Scope’ for debugging.
4) Add additional ‘To Workspace’ blocks for transferring the desired Simulink vehicle data into the Matlab workspace.
5) Modify the “Project1_ProcessingFile.m” as per the desired plots and required calculations.
6) Write a project report that contains the following:
- Tabulate the fuel economy numbers (kmpl) for UDDS and HWFET cycle. This forms the baseline numbers for comparing with the future hybrid version.
b. Plot the time trace for engine, transmission input, transmission output and wheel speed on one plot.
c. Plot engine torque, engine power, fuel rate and fuel consumption using subplots.
d. Plot accelerator and brake pedal, gear command, vehicle desired and actual speed, vehicle distance using subplots.
e. Plot the engine operating points on the engine fuel map.
f. Write down appropriate brief comments on each of these plots, describing the vehicle behavior throughout the drive cycle.
g. Generate the plots for both drive cycles
Case 1 UDDS DRIVE CYCLE:-
Matlab code for ‘project1_intifile’
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Skill-Lync -> Hybrid Drives Development
% Project 1 - Conventional Vehicle Model
% By - Abinash kumar
% 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);
Simulink Model:-
Vechile Model:-
Driver:-
UDDS Drive cycle Plot:-
Controller:-
UDDS Drive cycle Plot:-
Power Train:-
UDDS Drive cycle Plot:-
Engine:-
UDDS Drive cycle Plot:-
Transmission:-
UDDS Drive cycle Plot:-
Torque Converter:-
UDDS Drive cycle Plot:-
1.
2.
3.
Diffrential:-
Wheel:-
Vechile dyanamics:-
UDDS Drive cycle Plot:-
1.
2.
Matlab code for Project1_processingfile:-
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Skill-Lync -> Hybrid Drives Development
% Project 1 - Conventional Vehicle Model
% By - Abinash kumar
% 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.FuelConsumption; % Engine fuel consumption [g]
Veh_Dist = out.Vech_Dist/1000; % Distance traveled by vehicle [km]
Veh_Spd = out.Vech_Spd*18/5; % Vehicle speed [kmph]
wheel_speed=out.wheel_speed;
%% Data Analysis
Eng_Pwr = Eng_Spd.*pi./30.*Eng_Trq./1000; % Engine brake power [kW]
rho_petrol = 0.7197; % Density of petrol [kg/L]
kmpl = Veh_Dist(end)/(Eng_Fuel_Consump(end)/1000/rho_petrol); % 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)]);
%% PLotting Fuel Consumption vs Fuel Rate
figure(3)
hold on
grid on
plot(Time,out.FuelConsumption, 'linewidth', 1, 'Color', 'black');
plot(Time,out.Eng_Fuel_Rate, 'linewidth', 1, 'Color', 'red');
xlabel('Fuel Consumption')
ylabel('Fuel Rate')
xlim([0, Time(end)]);
legend('Fuel Consumption', 'Fuel Rate');
%% Plotting vehicle characteristics time trace engine torque, engine power, fuel rate and fuel consumption
figure(4)
subplot(2,2,1)
plot(Time, Eng_Trq, 'LineWidth',1,'Color','g')
xlabel('Time [s]')
ylabel('Torque [Nm]')
legend ('Torque')
subplot(2,2,2)
plot(Time, Eng_Pwr, 'LineWidth',1,'Color', 'black')
xlabel('Time [s]')
ylabel('Power [kW]')
legend('Engine Power')
subplot(2,2,3)
plot(Time, out.Eng_Fuel_Rate, 'LineWidth',1,'Color', 'red')
xlabel('Time [s]')
ylabel('Fuel Rate [%]')
legend('Fuel Rate')
subplot(2,2,4)
plot(Time, Eng_Fuel_Consump, 'LineWidth',1,'Color','blue')
xlabel('Time [s]')
ylabel('Fuel Consumption [kmpl]')
legend('Fuel Consumption')
%% Plotting vehicle characteristics time trace Engine, Transmission Input, Transmission Output and Wheel
figure(5)
hold on
grid on
plot(Time, Eng_Spd, 'LineWidth',1, 'Color','g');
plot(Time, Trans_In_Spd, 'LineWidth',1,'Color','black');
plot (Time, Trans_Out_Spd, 'LineWidth', 1, 'Color', 'red');
plot(Time, wheel_speed, 'LineWidth',1,'Color','blue');
xlabel('Time [s]')
ylabel('Speed [rpm]')
legend('Transmission Input', 'Transmission Output', 'Wheel Speed', 'Engine Speed');
%% plotting for drive cycle
figure(6)
plot(cyc_time, cyc_vel*(18/5), 'linewidth', 1, 'Color', 'green')
hold on
plot(Veh_Spd, 'linewidth', 1, 'Color', 'red')
xlabel('Time [s]')
ylabel('Vehicle Velocity (Km/h)')
legend('Vehicle Desired Velocity', 'Vehicle Actual Speed')
Plot for UDDS CYCLE:-
Figuer 1(Vechicle Characterestics time trace accleration and brake pedal,gear command,vechicle desired and actual speed):-
In this plot 3 subplot.
- In the first sub-category the Accelerator pedal and Brake pedal application are percentage designed for
driving cycle.
- The accelerator pedal and brake pedal are used according to the driving cycle.
iii. In the second sub-phase the transfer input speed and transfer output speed is set to
driving cycle.
Figure2(Engine operating point on engine fuel):-
i.An efficient Engine fuel map is set up at the service point.
ii.Also, real or active engine torque and engine speed are set on the fuel saving map.
Figure3(Fuel consumption vs Fuel ratio):-
Figure4(Vechile char time ,engine torque ,engine pwr, fuelrate & fuel consumption):-
Figure 4 contains 4 subplots.
i.In the first small phase the Accelerator Pedal system is percentage designed for a driving cycle.
ii.In the second sub-section the Brake Pedal application is a percentage scheduled for driving cycle.
iii. In the lower third phase the Gear command speed is set for a driving cycle.
- In the fourth episode the Vehicle Desired Velocity is organized for a driving cycle.
Figure5(Transmission input & Transmission output , Engine speed , Wheel speed):-
i.In this building engine speed, wheel speed, transmission input speed and transmission output speed are arranged in a single structure to compare between the speeds of the different part.
Figure6(Vechile desired velocity & Vechile actual speed):-
i.In this building Vehicle Desired Velocity and Vehicle Actual Velocity one episode is arranged for comparison.
ii.Between the required speed and actual speed and testing whether the vehicle can reach the desired speed of the drive cycle.
Case 2 HWFET DRIVE CYCLE:-
Matlab code for project1_intifile:-
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Skill-Lync -> Hybrid Drives Development
% Project 1 - Conventional Vehicle Model
% By - Abinash kumar
% 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 = 2; % 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);
Simulink Model:-
Vechile Model:-
Driver:-
HWFET Drive cycle Plot:-
Controller:-
HWFET Drive cycle Plot:-
Power Train:-
hWFET Drive cycle Plot:-
Engine:-
HWFET Drive cycle Plot:-
Transmission:-
HWFET Drive cycle Plot:-
Torque Converter:-
HWFET Drive cycle Plot:-
1.
2.
3.
Diffrential:-
Wheel:-
Vechile dyanamics:-
HWFET Drive cycle Plot:-
1.
2.
Matlab code for Project1_processingfile:-
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Skill-Lync -> Hybrid Drives Development
% Project 1 - Conventional Vehicle Model
% By - Abinash kumar
% 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.FuelConsumption; % Engine fuel consumption [g]
Veh_Dist = out.Vech_Dist/1000; % Distance traveled by vehicle [km]
Veh_Spd = out.Vech_Spd*18/5; % Vehicle speed [kmph]
wheel_speed=out.wheel_speed;
%% Data Analysis
Eng_Pwr = Eng_Spd.*pi./30.*Eng_Trq./1000; % Engine brake power [kW]
rho_petrol = 0.7197; % Density of petrol [kg/L]
kmpl = Veh_Dist(end)/(Eng_Fuel_Consump(end)/1000/rho_petrol); % 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)]);
%% PLotting Fuel Consumption vs Fuel Rate
figure(3)
hold on
grid on
plot(Time,out.FuelConsumption, 'linewidth', 1, 'Color', 'black');
plot(Time,out.Eng_Fuel_Rate, 'linewidth', 1, 'Color', 'red');
xlabel('Fuel Consumption')
ylabel('Fuel Rate')
xlim([0, Time(end)]);
legend('Fuel Consumption', 'Fuel Rate');
%% Plotting vehicle characteristics time trace engine torque, engine power, fuel rate and fuel consumption
figure(4)
subplot(2,2,1)
plot(Time, Eng_Trq, 'LineWidth',1,'Color','g')
xlabel('Time [s]')
ylabel('Torque [Nm]')
legend ('Torque')
subplot(2,2,2)
plot(Time, Eng_Pwr, 'LineWidth',1,'Color', 'black')
xlabel('Time [s]')
ylabel('Power [kW]')
legend('Engine Power')
subplot(2,2,3)
plot(Time, out.Eng_Fuel_Rate, 'LineWidth',1,'Color', 'red')
xlabel('Time [s]')
ylabel('Fuel Rate [%]')
legend('Fuel Rate')
subplot(2,2,4)
plot(Time, Eng_Fuel_Consump, 'LineWidth',1,'Color','blue')
xlabel('Time [s]')
ylabel('Fuel Consumption [kmpl]')
legend('Fuel Consumption')
%% Plotting vehicle characteristics time trace Engine, Transmission Input, Transmission Output and Wheel
figure(5)
hold on
grid on
plot(Time, Eng_Spd, 'LineWidth',1, 'Color','g');
plot(Time, Trans_In_Spd, 'LineWidth',1,'Color','black');
plot (Time, Trans_Out_Spd, 'LineWidth', 1, 'Color', 'red');
plot(Time, wheel_speed, 'LineWidth',1,'Color','blue');
xlabel('Time [s]')
ylabel('Speed [rpm]')
legend('Transmission Input', 'Transmission Output', 'Wheel Speed', 'Engine Speed');
%% plotting for drive cycle
figure(6)
plot(cyc_time, cyc_vel*(18/5), 'linewidth', 1, 'Color', 'green')
hold on
plot(Veh_Spd, 'linewidth', 1, 'Color', 'red')
xlabel('Time [s]')
ylabel('Vehicle Velocity (Km/h)')
legend('Vehicle Desired Velocity', 'Vehicle Actual Speed')
Plot for HWFET CYCLE:-
Figuer 1(Vechicle Characterestics time trace accleration and brake pedal,gear command,vechicle desired and actual speed):-
In this fighure contains 3 subplots.
i.The first part of the Accelerator pedal and Brake pedal application is a percentage designed for
driving cycle.
- The accelerator pedal and brake pedal are used according to the driving cycle.
iii. In the second sub-phase the transfer input speed and transfer output speed is set to driving cycle.
Figure2(Engine operating point on engine fuel):-
In this Figure the efficient fuel map of the Engine is set up in the component.
Also, real or active engine torque and engine speed are set on the fuel saving map.
Figure3(Fuel consumption vs Fuel ratio):-
Figure4(Vechile char time ,engine torque ,engine pwr, fuelrate & fuel consumption):-
Figure 4 contains 4 subplots.
- In the first phase of the Accelerator Pedal program the percentage is set for a drive cycle.
- In the second episode Brake Pedal's application percentage is scheduled for a driving cycle.
iii. In the lower third phase the Gear command speed is set for a driving cycle.
- In the fourth phase the Vehicle Desired Velocity is planned for a driving cycle.
Figure5(Transmission input & Transmission output , Engine speed , Wheel speed):-
In this building engine speed, wheel speed, transmission input speed and transmission output speed are arranged in a single structure to compare between the speeds of the different part.
Figure6(Vechile desired velocity & Vechile actual speed):-
In this building Vehicle Desired Velocity and Vehicle Actual Velocity one episode is arranged for comparison.
Between the required speed and actual speed and testing whether the vehicle can reach the desired speed of the drive cycle.
Conclusion:-
i.Therefore, the fuel-based model of conventional car power consumption has been successful
made using MATLAB and simulink.
- Analyze and understand vehicle performance points based on engine speed, torque, transmission
speed, tread space, gear, distance, speed and acceleration.
iii.Post process calculation is done and the required graphs are successfully organized.
- Successfully calculate the fuel-efficient [kmpl] number of a given city cycle [UDDS] and highway cycle [HWFET].