Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2017 Winter 8th Sem New 2180210 Automotive And Combustion Engine Technology Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII (NEW) EXAMINATION ? WINTER 2017
Subject Code: 2180210 Date: 15/11/2017
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) What is Engine downsizing? Write down any two methods for engine
downsizing.
03
(b) Enlist strategy for emission control in gasoline and diesel fueled
vehicle.
04
(c) Explain working of Direct Injection Gasoline Engine with schematic
diagram.
07
Q.2 (a) Enlist various after treatment technologies for diesel and gasoline
vehicle.
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 salient feature of spray guided combustion system for
gasoline direct injection.
07
Q.3 (a) What is turbocharging? What is the advantage of turbocharging in SI
engine?
03
(b) Describe Thermal loading and Turbo lag in context of gasoline engine
with turbo charging.
04
(c) Explain the reasons for knocking and abnormal combustion with
turbocharging in SI engine? Enlist the methods to reduce knock and
abnormal combustion of an SI engine with turbocharging.
07
OR
Q.3 (a) Enlist the possible measures for NOx reduction in diesel and petrol
vehicles.
03
(b) What is the effect of turbocharging on SI engine emission? 04
(c) Explain the advantages of combining direct injection and
turbocharging in SI engine.
07
Q.4 (a) What is auto ignition phenomenon? What is the basic difference
between auto ignition combustion and SI combustion?
03
(b) Enlist the problems associated with stratified charge lean-burn mixture
in a DI gasoline engine.
04
(c) Explain thermal management approach to achieving auto ignition
combustion in gasoline engine.
07
OR
Q.4 (a) What is internal exhaust gas recirculation system and external exhaust
gas recirculation system?
03
(b) Which are the modifications required to change from SI combustion to
auto ignition combustion?
04
(c) Explain the effect of fuel injection timing on auto ignition
combustion.
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII (NEW) EXAMINATION ? WINTER 2017
Subject Code: 2180210 Date: 15/11/2017
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) What is Engine downsizing? Write down any two methods for engine
downsizing.
03
(b) Enlist strategy for emission control in gasoline and diesel fueled
vehicle.
04
(c) Explain working of Direct Injection Gasoline Engine with schematic
diagram.
07
Q.2 (a) Enlist various after treatment technologies for diesel and gasoline
vehicle.
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 salient feature of spray guided combustion system for
gasoline direct injection.
07
Q.3 (a) What is turbocharging? What is the advantage of turbocharging in SI
engine?
03
(b) Describe Thermal loading and Turbo lag in context of gasoline engine
with turbo charging.
04
(c) Explain the reasons for knocking and abnormal combustion with
turbocharging in SI engine? Enlist the methods to reduce knock and
abnormal combustion of an SI engine with turbocharging.
07
OR
Q.3 (a) Enlist the possible measures for NOx reduction in diesel and petrol
vehicles.
03
(b) What is the effect of turbocharging on SI engine emission? 04
(c) Explain the advantages of combining direct injection and
turbocharging in SI engine.
07
Q.4 (a) What is auto ignition phenomenon? What is the basic difference
between auto ignition combustion and SI combustion?
03
(b) Enlist the problems associated with stratified charge lean-burn mixture
in a DI gasoline engine.
04
(c) Explain thermal management approach to achieving auto ignition
combustion in gasoline engine.
07
OR
Q.4 (a) What is internal exhaust gas recirculation system and external exhaust
gas recirculation system?
03
(b) Which are the modifications required to change from SI combustion to
auto ignition combustion?
04
(c) Explain the effect of fuel injection timing on auto ignition
combustion.
07
2
Q.5 (a) Enlist the controlling parameters for HCCI combustion for best fuel
economy and low emissions in SI engine.
03
(b) Explain basic principle of HCCI combustion. 04
(c) Explain stages of combustion of HCCI engine. 07
OR
Q.5 (a) Which are the primary objectives of gasoline HCCI engine and Diesel
HCCI engine?
03
(b) Enlist the limitation of HCCI combustion. 04
(c) Differentiate homogenous combustion and diffusion combustion
based on any seven aspects.
07
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This post was last modified on 20 February 2020