Project 2

Project 2:

Hybrid electric vehicle:

Initialization file script:

Simulink model:

P1 Hybrid Architecture Hybrid Drives Development :

Vehicle model:

• In vehicle mode we have 3 major part
• These are Driver, Controller, Powertrain.
• We taking output velocity as a feedback value to run vehicle to follow the drivecycle

Driver:

• Here we having the drivecircle.
• Drive cycle is the standard cycle to calculate or evaluate the model such as fuel ecconomy, performance and speed etc.
• Here by getting the velocity as a feed back value we control the vehicle speed of the model.
• And also have P,I controller also.

Result scope of the drive cycle and velocity:

• HWFET

•  UDDS

Controller:

• In this controller unit we have 4 major control unit in this hybrid model.
• 4major controller unit are Engine control unit, Transmission control unit, EM control unit, Brake control unit.

1 Engine control unit:

2 Transmission control:

3 EM control unit:

4 Brake control unit:

Scope:

• HWFET

•  UDDS

Powertrain:

• A powertrain is an assembly of every component that pushes your vehicle forward.
• Car's powertrain creates power from the engine and delivers it to the wheels on the ground.
• The key components of a powertrain include an engine, electric motor, transmission, driveshaft, axles, and differential.

Engine:

scope:

• HWFET

•  UDDS

Electric motor:

scope:

• HWFET

•  UDDS

ESS:

Scope:

• HWFET

•  UDDS

Transmission:

•  UDDS

Differntial:

Wheel:

Vehicle Dynamic:

Scope:

• HWFET

•  UDDS

Processing file:

Post-Processing File

File for post-processing the Conventional vehicle simulation model data

 

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_Trq1; % Engine brake torque [Nm]

Eng_Spd = out.Eng_spd1*30/pi; % Engine speed [rpm]

Eng_Fuel_Consump = out.Eng_Fuel_Consumption1; % 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]

Motr_Spd = out.motorspeed;

Motr_Pwr = out.motorpower;

Motr_Trq = out.motortorque;

SOC = out.soc;

Current = out.current;

Voltage = out.voltage;

 

 

workspace:

• HWFET

 

 

•  UDDS

Plotting vehicle characteristics time trace

figure()

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');

• HWFET

 

•  UDDS

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)]);

• HWFET

 

• UDDS

 

 

 

figure (2) Engine

title('Engine');

subplot(3,1,1);

hold on

grid on

plot (Time,Eng_Trq);

xlabel('Time'); ylabel('Eng trq');

subplot(3,1,2);

hold on

grid on

plot (Time,Eng_Pwr);

xlabel('Time'); ylabel('Eng pwr');

subplot(3,1,3);

hold on

grid on

plot (Time,Eng_Spd);

xlabel('Time'); ylabel('Eng spd');

• HWFET

 

•  UDDS

figure (3) Vehicle

title('Vehicle');

subplot(2,1,1);

hold on

grid on

plot (Time,Veh_Spd);

xlabel('Time'); ylabel('Veh spd');

subplot(2,1,2);

hold on

grid on

plot (Time,Veh_Dist);

xlabel('Time'); ylabel('Veh dist');

• HWFET

 

• UDDS

 

figure (4) Motor

title('Motor');

subplot(3,1,1);

hold on

grid on

plot (Time,Motr_Trq);

xlabel('Time'); ylabel('Motr trq');

subplot(3,1,2);

hold on

grid on

plot (Time,Motr_Pwr);

xlabel('Time'); ylabel('Motr pwr');

subplot(3,1,3);

hold on

grid on

plot (Time,Motr_Spd);

xlabel('Time'); ylabel('Motr spd');

• HWFET

 

• UDDS

 

figure (5) Battery

title('Battery');

subplot(3,1,1);

hold on

grid on

plot (Time,SOC);

xlabel('Time'); ylabel('soc');

subplot(3,1,2);

hold on

grid on

plot (Time,Current);

xlabel('Time'); ylabel('current');

subplot(3,1,3);

hold on

grid on

plot (Time,Voltage);

xlabel('Time'); ylabel('voltage');

• HWFET

 

• UDDS

 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]

• HWFET

                  

• UDDS

                  

 IF WE COMPARE  THE KMPL VALUES FOR UDDS AND HWFET CYCLE WE CAN SEE THAT KMPL IS MORE FOR HWFET BECAUSE IT HAVE MINIMUM IDLE LOSSES AND BREAKING IS NOT FREQUENT IN HIGHWAY CYCLE SO IT ULTIMATELY COMES UNDER MORE FUEL CONSUMPTION. 

 

CONCLUSION

• Hence, the p1 forward energy-based fuel consumption model of a HYBRID vehicle has been successfully Simulated using MATLAB and Simulink.
• Analyses and understands vehicle operating points based on engine speed, torque, transmission speed, pedal positions, gear, and distance travelled.
• Post process calculations were performed and the required graphs were successfully plotted.
• Successfully calculated vehicle fuel efficiency numbers (kmpl) for the given city cycle (UDDS) and highway cycle (HWFET)
• By comparing the Hybrid and conventional vehicle we getting good result for the Hybride, less fuel consumption for hybrid, good efficiency and good operating point for hybrid