Download GTU BE/B.Tech 2019 Winter 8th Sem New 2180215 Automotive And Combustion Engine Technology Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 8th Sem New 2180215 Automotive And Combustion Engine Technology Previous Question Paper

Page 1 of 2

Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? VIII (New) EXAMINATION ? WINTER 2019
Subject Code: 2180215 Date: 25/11/2019

Subject Name: Automotive And Combustion Engine Technology
Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Describe pollutants formed by combustion of gasoline in brief. 03
(b) Explain in brief advance technologies employed in gasoline engine to improve
fuel economy.
04
(c) Define term Downsizing. Explain any one method of downsizing. 07

Q.2 (a) Explain the need of after cooler in case of exhaust gas recirculation (EGR). 03
(b) Explain in brief concept of EGR with schematic diagram. 04
(c) Explain turbocharged direct injection (TDI) with schematic diagram. 07
OR
(c) List out exhaust emission control techniques. Explain urea-based SCR NOx after
treatment technique.
07

Q.3 (a) Define Ignition lag in brief. 03
(b) Explain gasoline auto ignition combustion through residual gas trapping approach. 04
(c) Describe combustion phenomenon of gasoline engine. 07
OR
Q.3 (a) What is internal exhaust gas recirculation system and external exhaust gas
recirculation system?
03
(b) Explain different types of direct injection gasoline injectors. 04
(c) Explain wall guided and spray guided direct injection combustion system. 07

Q.4 (a) Explain in brief concept of lean boost combustion system. 03
(b) Explain operation of gasoline auto ignition combustion with thermal management. 04
(c) Describe problems and challenges associated with turbo-charging the SI engine. 07
OR
Q.4 (a) Write disadvantages of wall guided direction injection system. 03
(b) Explain operational limitation of HCCI combustion. 04
(c) Explain working principle of auto ignition combustion in gasoline engine. 07

Q.5 (a) Explain in brief influences of EGR on exhaust emission of turbo charged diesel
engine.
03
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Page 1 of 2

Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? VIII (New) EXAMINATION ? WINTER 2019
Subject Code: 2180215 Date: 25/11/2019

Subject Name: Automotive And Combustion Engine Technology
Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Describe pollutants formed by combustion of gasoline in brief. 03
(b) Explain in brief advance technologies employed in gasoline engine to improve
fuel economy.
04
(c) Define term Downsizing. Explain any one method of downsizing. 07

Q.2 (a) Explain the need of after cooler in case of exhaust gas recirculation (EGR). 03
(b) Explain in brief concept of EGR with schematic diagram. 04
(c) Explain turbocharged direct injection (TDI) with schematic diagram. 07
OR
(c) List out exhaust emission control techniques. Explain urea-based SCR NOx after
treatment technique.
07

Q.3 (a) Define Ignition lag in brief. 03
(b) Explain gasoline auto ignition combustion through residual gas trapping approach. 04
(c) Describe combustion phenomenon of gasoline engine. 07
OR
Q.3 (a) What is internal exhaust gas recirculation system and external exhaust gas
recirculation system?
03
(b) Explain different types of direct injection gasoline injectors. 04
(c) Explain wall guided and spray guided direct injection combustion system. 07

Q.4 (a) Explain in brief concept of lean boost combustion system. 03
(b) Explain operation of gasoline auto ignition combustion with thermal management. 04
(c) Describe problems and challenges associated with turbo-charging the SI engine. 07
OR
Q.4 (a) Write disadvantages of wall guided direction injection system. 03
(b) Explain operational limitation of HCCI combustion. 04
(c) Explain working principle of auto ignition combustion in gasoline engine. 07

Q.5 (a) Explain in brief influences of EGR on exhaust emission of turbo charged diesel
engine.
03
Page 2 of 2

(b) What is the need of a cam profile switching (CPS) mechanism and twin
independent variable cam timing (VCT) device in SI and controlled auto ignition
operation in a gasoline engine?
04
(c) Write a short note on homogeneous charge compression ignition (HCCI) diesel
engine.
07
OR

Q.5 (a) Compare multi point fuel injection and gasoline direct injection system. 03
(b) Describe any one approach to HCCI operation in gasoline engines. 04
(c) Explain working of direct injection gasoline engine with neat sketch. 07


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