Effect of Gasoline Fuel Additives on Combustion and Engine Performance

Figure 5.4: SMD for gasoline with DCA-B at minimum transmission 
Figure 5.5: SMD for gasoline with C-B at minimum transmission 
6
7
8
9
10
11
12
13
14
40
50
60
70
80
90
100
110
120
SM
D,
 µm
Pressure, bar
Base
1X
10X
Base After
6
7
8
9
10
11
12
13
14
40
50
60
70
80
90
100
110
120
SM
D,
 µm
Pressure, bar
Base
1X
10X
Base After

---

5.1 Gasoline Spray Investigations with Additives 
122 
 
Figure 5.6: SMD for gasoline with AS-A at minimum transmission 
Figure 5.7: SMD for gasoline with CI-I at minimum transmission 
where injection pressures are much lower, changes in droplet sizes should be expected 
with high treat rates of DRA and DRB additives. However, treat rates as high as those 
in the current work are unlikely to ever occur in practice, especially as these additives 
are used in distribution systems and are unlikely to make it into vehicle fuel systems 
without degradation. Consequently, investigating the effect of the aforementioned 
additives with a PFI system any further was thought to offer no additional benefit. 
6
7
8
9
10
11
12
13
14
40
50
60
70
80
90
100
110
120
SM
D,
 µm
Pressure, bar
Base
1X
10X
Base After
6
7
8
9
10
11
12
13
14
40
50
60
70
80
90
100
110
120