Challenge

Week-3 Challenge: ADVISOR Tool

SShraddha Yamyar18 Nov 2021

Aim: To simulate a EV_defaults_in vehicle using Advisor with cargo mass of 500kg and to observe a FTP drive cycle

Objective: To add the cargo weight to the vehicle GUI and to find the distance traveled by the FTP drive cycle and to adjust the number of drive cycles to cover 45km distance.

Advisor GUI for the vehicle EV_defauls_in:

EV_default_in is a fully Electric vehicle. where, in the vehicle module battery and the motor is available as a source of energy and drivetrain respectively.

Specifications of the EV_default_in:

Vehicle Type: VEH_SMCAR

Weight: 552 kg

Energy storage :

Version : rint (internal resistance type)

Type: pb (lead acid battery) ESS_PB25

Modules of Battery: 25

Voltage of Battery: 308V

Weight: 275

Motor(MC_AC75):

Max. power: 75kw

Efficiency: 92%

Weight: 91kg

Transmission(TX_1SPD): Manual

Cargo mass : 500kg

Total mass of the vehicle : 1508 kg

The vehicle has front wheel drive The Internal view/block diagram of a Vehicle:

This block diagram is based upon the real time data feeder in terms of lookup table. It consists of a drive cycle, vehicle, wheel and axle, gear box, motor, electric acceleration loads, power bus and batteries modules. There are no inbuilt models of MATLAB.

FTP (Federal Test Procedure) drive test:

A driving cycle is a set of data points which represents the speed of a vehicle versus time. These are produced by different countries to assess the performance of vehicles in various ways, as for instance fuel consumption, electric vehicle autonomy and polluting emissions. FTP drive cycle is used for emission certification and fuel economy testing of light-duty vehicles in the United States. FTP is a varient of EPA Urban Dynamometer Driving Schedule (UDDS). This drive cycle consists following segments

Cold start transient phase (ambient temperature 20-30°C), 0-505 s,
Stabilized phase, 506-1372 s,
Hot soak (min 540 s, max 660 s),
Hot start transient phase, 0-505 s

One FTP drive cycle consists of following parameters:

Duration: 1877 s
Distance traveled: 17.77 km
Average speed: 34.12 km/h
Maximum speed: 91.25 km/h

FTP one drive cycle is 17.77km long so max 4 FTP drive cycles are required to drain SOC (state of charge) to completely zero.Here drive cycle statistics plot shows that for 40% of the drive cycle vehicle has speed in between 0 to 10 kmph. Only for 0.1% the vehicle speed was at max. speed.

Result Figure of the vehicle:

It is a result window for an EV_default_in vehicle. we can plot maximum 4 graphs in result window. First plot of the figure is for the FTP drive cycles. The second plot is of SOC drain curve, it shows that at the end of 2.5 drive cycles the soc curve reaches to the 0. The third plot by default is emission of the motor controller but I changed to the power loss of the battery storage.

After running the simulation of this vehicle, it covered a distance of 41.4 km. Hence EV_default_in vehicle cannot cover 45 km distance with 500kg cargo mass.

Aim2: To change the battery capacity for the EV_default0_in vehicle keeping all other parameters same as above.

Here battery modules changed 25 to 30 to increase the power storage capacity of the battery. Now the battery's maximum voltage reaches 370V and the total weight of the battery is 330kg. This change will result to as follows

By increasing 5 modules of battery the vehicle covers the distance of 49.1 km in 3 FTP drive cycles.

Aim3: To perform gradeability test with PRIUS_Jpn_defaults_in

Prius_jpn_defaults_in vehicle model looks like,

PRIUS_Jpn_defaults_in is a vehicle model of Toyota. Toyota PRIUS is a series parallel hybrid or power split model. where the mechanical power is partially converted into electrical energy and mechanical energy for propulsion.

Specifications:

Vehicle Type: VEH_PRIUS_JPN

Weight: 918 kg

Fuel Converter(FC_PRIUS_JPN):

Version: Internal Combustion

Type: Spark Ignition

Max. Power: 43kw

Efficiency: 39%

Weight: 137kg

Exhaust Aftertreat (EX_SI):

Weight: 11kg

Energy storage :

Version : rint (internal resistance type)

Type (ESS_NIMH6) : Nickel metal hybrid battery

Modules of Battery: 40

Voltage of Battery: 308V

Weight: 40 kg

Motor(MC_PRIUS_JPN):

Max. power: 31kw

Efficiency: 91%

Weight: 57kg

Generator(GC_PRIUS_JPN): Regular

Max. power: 15kw

Efficiency: 84%

Weight: 33kg

Transmission(TX_PRIUS_CVT_JPN): CVT

Cargo mass : 136kg

Total mass of the vehicle : 1332kg

In this simulation by default the one drive cycle UDDS is used. To check the gradiability response enable the gradeability test option. Here keep gradeability constant as 6%. Vary the speed and run the gradeability test for 10 sec to see the result.

In the above figure speed is 40 mph i.e. 64.4 km/h this speed will have the 2.5% greadability.

Similarly gradeability test is taken for following speeds.


Speed(mph)	Speed(km/h)	Gradeability(%)
40	64.4	2.5
45	72.4	2.2
50	80.5	2
55	88.5	1.7
60	96.6	1.5

As the speed of vehicle increses the Gradeability decreases.

Week-3 Challenge: ADVISOR Tool

Ship work like this
in your own course.

Talk to a career counsellor

Ship work like thisin your own course.

Talk to a career counsellor

Ship work like this
in your own course.