Earth & Environmental Sciences
exhaust gas
94%
diesel
76%
combustion
61%
exhaust emission
39%
diesel engine
36%
smoke
32%
gasoline engine
23%
hydrocarbon
22%
combustion gas
21%
effect
18%
gas
16%
experimental study
12%
economy
12%
air
8%
temperature
6%
parameter
5%
rate
5%
Engineering & Materials Science
Exhaust gas recirculation
100%
Fuel injection
53%
Inert gases
38%
Smoke
32%
Hydrocarbons
28%
Diesel engines
28%
Direct injection
17%
Fuel economy
16%
Combustion chambers
16%
Engine cylinders
15%
Gasoline
15%
Deterioration
14%
Ignition
14%
Engines
10%
Gases
9%
Air
8%
Temperature
6%
Chemical Compounds
Fuel
53%
Gas
42%
Smoke
36%
Noble Gas Atom
34%
Combustion Gas
24%
Hydrocarbon
22%
Pressure
18%
Cylinder
17%
Gasoline
17%
Reduction
7%
Mixture
7%