1st Assignment – Hybrid Powertrains | My Assignment Tutor

1Assignment Briefing Sheet (2020/21 Academic Year)Section A: Assignment title, important dates and weighting Assignment title:1st Assignment – Hybrid PowertrainsGroup orindividual:Individual Module title:Electric Vehicle TechnologyModulecode:7ENT1132 Module leader:Dr Christos KalyvasModerator’sinitials:PA Submissiondeadline:29-04-2123:00Target date for return ofmarked assignment:Week 44 You are expected to spend about25hours to complete this assignment to asatisfactory standard. This assignment is worth50 %of the overall assessment for this module. Section B: Student(s) to complete Student ID numberYear Code Notes for students• For undergraduate modules:o a score of 40% or above represents a pass performance at honours level.o late submission of any item of coursework for each day or part thereof (or for hard copy submission only,working day or part thereof) for up to five days after the published deadline, coursework relating tomodules at Levels 0, 4, 5, 6 submitted late (including deferred coursework, but with the exception ofreferred coursework), will have the numeric grade reduced by 10 grade points until or unless thenumeric grade reaches or is 40. Where the numeric grade awarded for the assessment is less than 40,no lateness penalty will be applied.• For postgraduate modules:o a score of 50% or above represents a pass mark.o late submission of any item of coursework for each day or part thereof (or for hard copy submission only,working day or part thereof) for up to five days after the published deadline, coursework relating tomodules at Level 7 submitted late (including deferred coursework, but with the exception of referredcoursework), will have the numeric grade reduced by 10 grade points until or unless the numeric gradereaches or is 50. Where the numeric grade awarded for the assessment is less than 50, no latenesspenalty will be applied.• Late submission of referred coursework will automatically be awarded a grade of zero (0).• Coursework (including deferred coursework) submitted later than five days (five working days in the case of hardcopy submission) after the published deadline will be awarded a grade of zero (0).• Regulations governing assessment offences including Plagiarism and Collusion are available fromhttps://www.herts.ac.uk/about-us/governance/university-policies-and-regulations-uprs/uprs (refer to UPR AS14)• Guidance on avoiding plagiarism can be found here:https://herts.instructure.com/courses/61421/pages/referencing-avoiding-plagiarism?module_item_id=779436• Modules may have several components of assessment and may require a pass in all elements. For furtherdetails, please consult the relevant Module Handbook (available on Studynet/Canvas, under Module Information)or ask the Module Leader. 2Assignment Briefing Sheet (2020/21 Academic Year) This Assignment assesses the following module Learning Outcomes (from DefinitiveModule Document):1. Evaluate the different Hybrid & Electric powertrain architecture options and be able topropose appropriate solutions within realistic performance, fuel economy, emission andcommercial constraints.2. Design and/or size different Hybrid and Electric Vehicle sub-systems, within thecontext of vehicle usage, weight, packaging, and range constraints.Assignment Brief:Please see the questions, which are documented from page 3 onwards.Submission Requirements:You are required to submit your answers to the questions via Canvas. You will need to provide youranswers in a word document and submit your word document via Canvas. Hand in the answers tothese questions as indicated on the question sheet.Marks awarded for:Accurate answers to the questions. Detailed marking scheme is provided in the subsequent pages.Type of Feedback to be given for this assignment:Individual assignment feedback, generic feedback on Canvas. 3Electric Vehicle Technology – 1st Assignment-Hybrid PowertrainsMarking Scheme Question 130 marksQuestion 230 marksQuestion 340 marksTotal Marks100 marks ——————————————————————————————————————–Question 1Matthew is a travelling salesman who, in order to perform his job, must drive long distances to visitprospective customers. This involves driving primarily on highways. His company has given him acompany car, a 4-door sedan, equipped with a non-hybrid 2-litre petrol engine to perform thesejourneys.Matthew’s boss recommends that he should swap the car he has for the mild hybrid version of thesame car, which is equipped with a 1.4 litre petrol engine and an electric motor. His boss states thatthis car will allow him to use less fuel on his work journeys because it is a hybrid car. Matthew doessome research on this vehicle and finds out that it has a series-parallel drivetrain.i. Is Matthew’s boss correct in his statement? Explain your answer. Use diagrams andliterary references as required. Include in your answer a diagram of the drivetrainarchitecture of the vehicle in question.(15 marks)Matthew’s research additionally reveals that the car is also available in a second hybrid drivetrainoption. This second option is an energy hybrid with a series powertrain architecture.ii. Would this vehicle be more or less suitable for Matthew than the mild hybrid option hisboss recommended? Explain your answer. Use diagrams and literary references asrequired. Include in your answer a diagram of the drivetrain architecture of the secondvehicle in question.(15 marks)Please write no more than 200 words in your answers for each of these questions. Please state thenumber of words you use for each answer. Marks will be awarded for the quality of technicallanguage used as well as for technical content.4Question 2Assume that you need to design MPC model for your vehicle stability control system. Please answerthe following questions if the main structure is as given below.a) Specify the name of the blocks, A, B, C, D in above MPC flowchart.(5 marks)b) Assume the algorithm on MPC is set to solve a problem with three variables (𝛽, 𝛼, 𝛿) where themulti-stage problem formulation (or function) is:If w = 1, and ℎ(𝛼, 𝛿) = 10, rewrite the problem function for only 𝛽 minimisation task.(15 marks)c) Find the fastest time possible to solve the above problem function (b) using MPC.(10 marks)Question 31. A battery electric Vauxhall Ampera costs £39,995 before including the £5,000 governmentpurchase subsidy. A Ford Focus diesel with a fuel consumption of 53 mpg costs £15,450.Assume the average motorists does 12000 miles per year and diesel fuel costs £1.50 per litre.Also, assume that electricity is free and that the Ampera driver manages to use a negligibleamount of petrol by running entirely on plug-in electricity.a) Calculate the payback time for the Vauxhall Ampera to repay the additional costcompared to a diesel Focus, with and without the subsidy.(20 marks)b) If the Ampera battery has a life of 10 years and costs £20,000 to replace, calculate thewhole life difference in cost of the Ampera compared with a Ford Focus over a 20 yearoperating life (i.e. consider only the case without subsidy). (10 marks)Note: 1 gallon = 4.546 litres2. Based on the assumptions and the table provided, compare the greenhouse gas emissions ofoperating an electric vehicle vs. an internal combustion engine (ICE) vehicle. Assume gridelectricity is generated using the following mix: 7% hydroelectric, 20% nuclear, 24% naturalgas, 45% coal, 4% renewables. Also, make use of the tabulated figures below:𝑚𝑖𝑛𝛽,𝛼,𝛿 𝑓(𝑤, 𝛽) + 𝑔(𝛽, 𝛼) + ℎ(𝛼, 𝛿)5 Generation MethodGreenhouse Gas Emissions (Tons CO2 / kWh )Hydroelectric~0Nuclear~0Natural Gas(117,000 lbs/billion BTU) = 0.40 lbs CO2/kWhCoal(208,000 lbs/billion BTU) = 0.71 lbs CO2/kWhOther Renewables0 Further assumptions: Electric Vehicle Efficiency = 350 Wh/mileElectric Grid Efficiency = 0.9Average Fuel Economy, ICE Vehicle = 27.5 mpgCO2 Content in Gasoline = 20 lbs / gallon gasoline(10 marks)


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