GTU B.Tech 2020 Winter Question Papers || Gujarat Technological University
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GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-VIII (NEW) EXAMINATION — WINTER 2020
Subject Code:2180215 Date:21/01/2021
Subject Name:Automotive And Combustion Engine Technology
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
(a) What is Automobile? What is Engine? 03
(b) Explain different types of Nozzles used in Diesel engine. 04
(c) Define: Engine downsizing. Explain the methods to achieve downsizing. 07
(a) Define : Atkinson cycle and Miller cycle. 03
(c) With a neat sketch explain thermodynamic analysis of gasoline direct injection 07
at part-load condition.
(a) What is turbo charging? Advantage of turbo charging in SI engine. 03
(b) What is stratified charge operation in case of gasoline direct injection? 04
of gasoline direct injection.
(a) What is Hybrid vehicle? 03
(b) Write the advantages of gasoline direct injection in terms of efficiency in a real 04
engine.
ignition combustion and SI combustion?
(a) Enlist the limitation of HCCI combustion. 03
(b) Compare emissions with HCCI and CI engine operation. 04
(c) Explain stages of combustion-of HCCI engine. 07
(b) Name the different types of supercharger. Explain any one of them. 04
(c) Describe the purpose of supercharging and also explain with thermodynamic 07
cycles with supercharging.
(a) Explain basic principle of HCCI combustion. 03
and low emissions in SI engine.
(c) Comparison of knocking in S.I. and C.I. engine. 07
(a) What is internal exhaust gas recirculation system and external exhaust gas 03
recirculation system?
ignition combustion?
(c) What are the approaches to auto ignition combustion operation in gasoline 07
engines? Explain any two in detail.
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Q.8GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-VIII (NEW) EXAMINATION — WINTER 2020
Subject Code:2180215 Date:21/01/2021
Subject Name:Automotive And Combustion Engine Technology
--- Content provided by FirstRanker.com ---
Time:02:00 PM TO 04:00 PM Total Marks: 56Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
--- Content provided by FirstRanker.com ---
MARKS(a) What is Automobile? What is Engine? 03
(b) Explain different types of Nozzles used in Diesel engine. 04
(c) Define: Engine downsizing. Explain the methods to achieve downsizing. 07
(a) Define : Atkinson cycle and Miller cycle. 03
--- Content provided by FirstRanker.com ---
(b) Explain EGR with the neat sketch. 04(c) With a neat sketch explain thermodynamic analysis of gasoline direct injection 07
at part-load condition.
(a) What is turbo charging? Advantage of turbo charging in SI engine. 03
(b) What is stratified charge operation in case of gasoline direct injection? 04
--- Content provided by FirstRanker.com ---
(c) Explain the wall, air and spray combustion system for the mixture preparation 07of gasoline direct injection.
(a) What is Hybrid vehicle? 03
(b) Write the advantages of gasoline direct injection in terms of efficiency in a real 04
engine.
--- Content provided by FirstRanker.com ---
(c) What is auto ignition phenomenon? What is the basic difference between auto 07ignition combustion and SI combustion?
(a) Enlist the limitation of HCCI combustion. 03
(b) Compare emissions with HCCI and CI engine operation. 04
(c) Explain stages of combustion-of HCCI engine. 07
--- Content provided by FirstRanker.com ---
(a) Give the difference between turbo charging and supercharging. 03(b) Name the different types of supercharger. Explain any one of them. 04
(c) Describe the purpose of supercharging and also explain with thermodynamic 07
cycles with supercharging.
(a) Explain basic principle of HCCI combustion. 03
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(b) Enlist the controlling parameters for HCCI combustion for best fuel economy 04and low emissions in SI engine.
(c) Comparison of knocking in S.I. and C.I. engine. 07
(a) What is internal exhaust gas recirculation system and external exhaust gas 03
recirculation system?
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(b) Which are the modifications required to change from SI combustion to auto 04ignition combustion?
(c) What are the approaches to auto ignition combustion operation in gasoline 07
engines? Explain any two in detail.
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