Download GTU BE/B.Tech 2019 Summer 8th Sem New 21802102180215 Automotive And Combustion Engine Technology Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 8th Sem New 21802102180215 Automotive And Combustion Engine Technology Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VIII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2180210/2180215 Date:13/05/2019

Subject Name:Automotive And Combustion Engine Technology

Time:10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

MARKS

Q.1 (a) What is turbo charging? 03
(b) Enlist strategy for emission control in gasoline and diesel fueled vehicle. 04
(c) Define: Engine downsizing. Explain the methods to achieve downsizing. 07

Q.2 (a) What is lean boost direct injection (LBDI) concept? 03
(b) What is stratified charge operation in case of gasoline direct injection? 04
(c) Explain different types of direct injection gasoline injectors. 07
OR
(c) Explain the thermodynamic aspects of gasoline direct injection and describe
the combustion processes.
07
Q.3 (a) Explain Lean NOx trap. 03
(b) Describe Thermal loading and Turbo lag in context of gasoline engine. 04
(c) Explain the reasons for knocking and abnormal combustion with
turbocharging in SI engine?
07
OR
Q.3 (a) What is spray guided combustion system? 03
(b) Explain EGR with the neat sketch. 04
(c) Explain the salient features of the first-generation and the second generation
gasoline direct injection engines.
07
Q.4 (a) Explain phases of combustion of gasoline engine. 03
(b) Explain the principle of auto ignition. 04
(c) What are the advantages of combining direct injection and turbo charging in
spark-ignition engine
07
OR
Q.4 (a) Write short note on combustion diesel engine.. 03
(b) Mention the advantages of direct injection system. 04
(c) Enlist the problems associated with stratified charge lean-burn mixture in a DI
gasoline engine.
07
Q.5 (a) What is supercharging? 03
(b) Enlist the limitation of HCCI combustion. 04
(c) Differentiate homogenous combustion and diffusion combustion based on any
seven aspects.
07
OR

Q.5 (a) Explain exhaust gas treatment. 03
(b) Describe the fundamental principle of HCCI 04
(c) Explain the effect of fuel injection timing on combustion. 07

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