Question

A six cylinder gasoline engine operates on the 4 stroke cycle. The bore of each cylinder is 80 mm & stroke 100 mm. the clearance volume per cylinder is 70CC at a speed of 4000rpm. The fuel consumption is 20kg/hr. the torque developed is 150Nm. Calculate 1. Brake power 2. Brakes mean effective pressure 3. Brake thermal efficiency, if the calorific value of fuel is 43000Kj/Kg. 4. The relative efficiency of the brake power is assuming the engine works on constant volume γ=1.4 for air

Answer 1

Answer:

Q2/ A six-cylinder, gasoline engine operates on the four-stroke cycle. The böre of each cylinder is 80 mm and the stroke is 100 mm. The clearance volume per cylinder is 70 cc. At the speed of 4100 rpm, the fuel consumption is 5.5 gm/sec (or 19.8 kg/hr.) and the torque developed is 160 Nm. Calculate: (1) Brake power, (ii) The brake mean effective pressure, (iii) Brake thermal efficiency if the calorific