A small in-line, four-cylinder, 2.2 L, CI automobile engine equipped with cylinder cut-out, operates on a four-stroke Dual cycle using light diesel fuel with When very little power is required the...

A small in-line, four-cylinder, 2.2 L, CI automobile engine equipped with cylinder cut-out, operates on a four-stroke Dual cycle using light diesel fuel with When very little power is required the engine converts to a two-cylinder 1.1 L engine and operates at a higher speed. As a four-cylinder, the engine runs at 2100 RPM, with a volumetric efficiency of 61%, and a brake thermal efficiency of 45%. As a two-cylinder, the engine has a volumetric efficiency of 82%, and a brake thermal efficiency of 42%. Combustion efficiency is 98% at all times.

Calculate:

(a) Flow rate of air into four-cylinder engine at 2100 RPM. [kg/sec]

(b) Flow rate of air into two-cylinder engine to produce same brake power output. [kg/sec]

(c) Speed needed as two-cylinder engine to produce same brake power. [RPM]