Date post: | 27-Mar-2015 |
Category: |
Documents |
Upload: | kayla-schroeder |
View: | 237 times |
Download: | 6 times |
Engine Vehicle Integration – Exhaust 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 – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Exhaust manifold and turbo group Performance
Catalysts and Particulate Filter Emission
HOT END
COLD END
Mufflers (silencers)
Volume & technology Comfort
Engine Vehicle Integration – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Design guidelines for gasoline engines
Exhaust manifold designed to optimize engine torque and/or power: for example, duct diameter and length, and for 4 L, the distance of the firs junction (1-3, 2-4) and also of the second from the cylinder head.
Adequate catalyst volume (space velocity): roughly equivalent to the engine capacity.
Optimization of the catalyst canning inlet flow to address the entire catalyst surface.
Reduced thermal inertia of the exhaust system upstream the catalyst for a faster catalyst warm-up
Engine Vehicle Integration – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Example of catalyst positioned very close to the engine (close coupled) inside the engine compartment
Short and simple exhaust manifold (4-1)
Engine Vehicle Integration – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Catalyst positioned very close to the engine (close coupled) inside the engine compartment
Engine Vehicle Integration – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Twin main catalyst positioned inside the engine compartment of a high performance 4 L engine
Engine Vehicle Integration – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Twin main catalyst positioned inside the engine compartment of a high performance 4 L engine (bottom view)
Engine Vehicle Integration – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Two pre-catalysts inside the engine compartment and under-floor main (4L engine)
Complete exhaust system
Engine Vehicle Integration – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
L6 engine longitudinal installed – Twin exhaust system (one for each cylinder head): two close-coupled pre-catalysts and two under floor main catalysts
Engine Vehicle Integration – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
L6 engine longitudinal installed – Twin exhaust system (one for each cylinder head): two close-coupled pre-catalysts and two under floor main catalysts (bottom view)
Engine Vehicle Integration – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
V6 engine transversal installed – Twin exhaust system (stereo system): two close-coupled pre-catalysts and two under floor main catalysts
Engine Vehicle Integration – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Design guidelines for Diesel engines
Manifold design to optimize the inlet flow to the turbo and to reduce the local thermal stress.
Adequate catalyst and particulate filter volumes: 0.8-1.0 engine capacity
Catalyst and particulate filter positioned as close as possible downstream the turbo outlet.
Engine Vehicle Integration – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Catalyst positioned immediately downstream the turbo of a direct injection Diesel engine
Engine Vehicle Integration – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Catalyst positioned downstream the turbo of a direct injection Diesel engine
Engine Vehicle Integration – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Engine Vehicle Integration – Exhaust system
Scuola di Dottorato di Ricerca 2010 - Road vehicle and engine engineering science
Catalyst positioned downstream the turbo of a direct injection Diesel small capacity engine