TESTING OF INTERNAL COMBUSTION ENGINE

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TESTING OF INTERNAL COMBUSTION ENGINES

  Purpose of Testing

The testing is carried out in order to verify the designed data. It also gives the information for the developed engine to achieve the following objectives:

(i) To get and know information which is not possible by calculations

(ii) To confirm the validity of the data and assumptions used in design

(iii) To satisfy the customer of the mileage per liter of fuel consumed

       Types of testing

a. Commercial testing

b. Thermodynamic testing

        Commercial Testing

(i) To determine the rated power output with respect to the fuel consumption i.e. BHP/kg of fuel

(ii) To determine the quantity of lubricating oil used per BHP

(iii) To determine the quantity of cooling water required per BHP

(iv) To determine the overload capacity of the IC Engine

(v) To determine the steadiness of the IC engine under different loads

(vi) To check the proper opening and closing timings of the inlet and exhaust valves

(vii) To check for maintenance free operation

       Thermodynamic Testing

(i) These tests are carried out to compare the actual performance. These tests also help to prepare the heat balance sheet of the engine. The following thermodynamic tests  determine the thermal efficiency.

(ii) Measurement of indicated power

(iii) Measurement of the BHP

(iv) Measurement of the rate of fuel consumption

(v) Heat carried away with the exhaust gases

(vi) Measurement of the calorific value of the fuel

      PERFORMANCE PARAMETERS

              Only after testing of internal combustion engines, one can be sure about the degree of success. It also gives the information  about the conversion of calorific heat (chemical energy) into mechanical energy (motion). Thus the performance of the engine is evaluated. The various parameters for  engine performance are:

(a) Power produced

(b) Mechanical Efficiency

(c) Mean Effective Pressure

(d)Torque

(e) Specific Output

(f) Volumetric Efficiency

(g) Fuel-air Ratio

(h) Specific Fuel Consumption

(i) Thermal Efficiency

(j)  Heat Balance

(k) Exhaust Smoke and Other Emissions

(l) Specific Weight