Lab report ic engine 13
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This lab report discusses measurements of brake mean effective pressure and brake power of a diesel engine. A group of 3 students conducted the experiment using a diesel engine analyzer and dynamometer. They measured the engine speed, brake power, and calculated the brake mean effective pressure at different speeds. Their results showed that brake power increased linearly with speed, while brake mean effective pressure increased at first then leveled off at higher speeds.
Lab report ic engine 13
- 1. LAB REPORT INTERNAL COMBUSTION ENGINE GROUP MEMBERS: AMEER NAWAZ (08-HITEC-ME-16) ALI RAZA (08-HITEC-ME-14) ARSLAN FAZIL (08-HITEC-ME-19) SECTION: “C” EXP : “05” DATED : January 2012 SUBJECT: Measurements of brake mean effective pressure and brake power of the engine. . SUBMITED TO: SIR KAMRAN KAYANI.
- 2. APPARATUS: Diesel engine analyzer (4-stroke). THEORY: In this experiment we measured brake mean effective pressure and brake power of the diesel engine. Speed of the engine was easily measured with the help of digital tachometer that is attached to the computer. Brake power of the engine was calculated by dynamometer. We have a relation by which we easily calculated brake mean effective pressure. Where Where By relation we derived, we calculated brake mean effective pressure. By increasing speed brake power of the engine increases because we set the torque constant so graph between speed and brake power is linear. By increasing speed brake mean effective pressure first increases but after certain level of speed it becomes low relatively to the previous.
- 3. PROCEDURE: First of all turn non engine analyzer. Then tachometer was turned on and air tank intake was properly checked. Then with coil starter start engine analyzer. Noted the reading from analyzing software in computer. At different speeds and measured Brake power. Then calculate brake mean effective pressure. TABLE: Serial no. Speed Brake Power Brake Mean Effective pressure (rpm) (kwh) (bar) 1 1463 603 2.47 2 2093 1567 4.49 3 2880 2666 5.55 4 2938 2771 5.56 5 2945 2805 5.62 BRAKE POWER GRAPH: 3500 3000 2500 2000 1500 Brake Power 1000 500 0 1226 2013 2314 2595 2870 3128 3371 3599
- 4. BRAKE MEAN EFFECTIVE PRESSURE: 500 450 400 350 300 250 Brake Mean Effective 200 pressure 150 100 50 0 1226 2013 2314 2595 2870 3128 3371 3599 DISCUSSION AND CONCLUSIONS: In this practical of internal combustion petrol engine lab it is observed that with the increase in speed the break power of the engine go on increasing and continue to increase up till end, but in case of bmep, the value of bmep increases with the increase in speed in start and this increase is quite significant but later on, with further increase in speed will show a very less change or increase in the value of bmep and the value of break mean effective pressure become almost constant.