Methanol
117
Cylinder pressure (MPa)
8
7
6
5
4
3
2
M0
M5
M10
M15
20° CA BTDC,
(ORG injection timing)
20 Nm
–20
–10
0
1 0
2 0
30
40
Crank angle (deg)
Figure 4.16
Cylinder gas pressure versus CA at 20 Nm load and ORG injection timing. (From Canakci, M.,
Sayin, C., and Gumus, M., Energy and Fuels, 22, 3709–23, 2008. Reprinted with permission from
ACS Publications.)
Cylinder pressure (MPa)
7
6
5
4
3
2
M0
M5
M10
M15
20° CA BTDC,
(ORG injection timing)
10 Nm
–20
–10
0
1 0
2 0
30
40
Crank angle (deg)
Figure 4.17
Cylinder gas pressure versus CA at 10 Nm load and ORG injection timing. (From Canakci, M.,
Sayin, C., and Gumus, M., Energy and Fuels, 22, 3709–23, 2008. Reprinted with permission from
ACS Publications.)
7.2 MPa (at 5 .08° C A ATDC) for advanced ORG and retarded injection
timings, respectively. The trend was such that, as injection started earlier,
peak pressures became higher, which applied to all fuel blends. Also, the
peak pressures occurred earlier with advancing injection timings (Ozsezen,
Canakci, and Sayin 2008; Pukrakek 1997).