Page 377 - Advances in Eco-Fuels for a Sustainable Environment

332 Advances in Eco-Fuels for a Sustainable Environment

Fig. 11.6 Friction coefficient behavior of diesel and biodiesel with respect to time in run
in period.

Fig. 11.7 Friction coefficient behavior of diesel and biodiesel with respect to time in steady
state condition.

Flash temperature parameter (FTP) and wear scar diameter of fuel are inversely
related. The WSD and FTP of biodiesel are approximately 23% less and 30% higher
than diesel, respectively. The high FTP value of biodiesel indicates that the lubricating
film formed between balls remains stable up to a very high temperature. The very
large value of WSD of diesel indicates the adverse wear on the metal. The biodiesel
has a lower WSD value due to its high amount of oxygen content, which reduces the
friction and improves the lubricity between the top and bottom metal balls.