| Popis: |
The pressure existing just before exhaust in a Diesel engine is shown to be significant as a means of indicating load adjustments in a multicylinder engine. This paper explains the theory and method used in obtaining these pre-exhaust pressures, along with the supporting data from an extensive series of tests. These tests were conducted at Lehigh University on both two-stroke-cycle multicylinder engines and a four-stroke-cycle single-cylinder C.F.R. test engine. Under definite known conditions of injection, timing, and compression ratio it was found possible to evaluate both indicated and brake horsepower in terms of pre-exhaust pressure. Experimental work in progress shows that the same method is applicable to spark-ignition engines. |
