engine vehicle integration – intake system scuola di dottorato di ricerca 2010 - road vehicle and...
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Engine Vehicle Integration – Intake system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
1. Combustion engines main principles and definitions
2. Reciprocating combustion engines architecture
3. Reciprocating engines dynamic properties
4. Engine components and systems
5. The engine management system for gasoline and Diesel engines
6. The emission Requirements & Technology
7. Engine vehicle integration
7.1 Engine layout and mounting7.2 Engine-vehicle cooling system7.3 Intake system7.4 Exhaust system
Engine Vehicle Integration – Intake system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science 2
The main function of an engine intake system is to deliver combustion air to the engine. To condition the air, just particulate removal, to protect engine parts from airborne impurities (dirt and other particulate matter). To reduce noise transmitted from the engine intake. To give a positive contribution to the engine performance
Main functions
Composition
The intake snorkel (opening for the intake air to enter the system) Tube leading to the air filter (“dirty air line”) Air filter Tube leading to the engine (“clean air line”) Air mass flow meter Throttle body Resonator (silencer) to minimize the noise entering the cabin Blow by inlet
Engine Vehicle Integration – Intake system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
snorkel
Dirty air
Filter box
Air filterClean air
Typical engine intake system
Engine Vehicle Integration – Intake system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Sizing for intake noise reduction
5.0 ¸ 5.5 l/l of engine displacement
Resonator
Filter volume function of
Technology / costy
Mean air flow rate (depending on engine diaplacement)
Airborn impurity (vehicle mission)
Replacemnet interval
Intake system main design guidelines
Engine Vehicle Integration – Intake system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
0,4 0,6
0,8 1
1,2 1,4
0,5 0,7
0,9 1,1
1,3 1,5
0
20000
40000
60000
80000
100000
120000
140000
160000
180000
Life (Km)
Dust concentration (mg/m ) 3
Filtering surface (m ) 2
SERVICE INTERVAL (Km)
160000-180000 140000-160000 120000-140000 100000-120000 80000-100000 60000-80000 40000-60000 20000-40000 0-20000
Example of the relation among filtering surface, dust concentration and service interval (air flow rate 220 m3/h)
Intake system main design guidelines
Engine Vehicle Integration – Intake system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Engine on-board air filter
Engine Vehicle Integration – Intake system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Example of vehicle on-board air filter
Engine Vehicle Integration – Intake system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Example of vehicle on-board air filter for a diesel engine
Engine Vehicle Integration – Intake system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Theoretical effect of the charge air pressure in the intake manifold on the engine maximum output motore
Intake line pressure drop minimization
Engine Vehicle Integration – Intake system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Various component effect on the engine torque and volumetric efficiency
The air charge optimization
Engine Vehicle Integration – Intake system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Intake opening point (snorkel) positioned just below the left front lights)
Snorkel positioning
Engine Vehicle Integration – Intake system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Intake opening point (snorkel) positioned on the vehicle front end outside the engine compartment (fresh and dynamic air))
Snorkel positioning
Engine Vehicle Integration – Intake system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Air mass flow meter positioning Flange-hose installation
blow-by inletconnection
Compressorinlet
Flow meter Air filter
Mass flow meter positioning
Air mass flow meter positioning Hose-hose installation