Study of Knocking Effect in Compression Ignition Engine with Hydrogen as a Secondary Fuel

Table 1

Fuels properties.

Properties	Biodiesel	Hydrogen	Diethyl ether
Chemical formula	—	H2	C2H5OC2H5
Auto Ignition Temperature (K)	535	858	433
Calorific value (MJ/kg)	38.5	119.9	33.9
Density (kg/m^3)	885	0.0837	713
Viscosity at 15.5°C, centipoises	—	—	0.023