Engine Dynamometer Test Equipment

FIG, 2—Engine Dynamometer Test Equipment. This is the third step in a comprehensive four-step evaluation program, consisting of glassware, simulated service, engine dynamometer, and vehicle testing. 

Phase I—Chassis Dynamometer Tests. A 1.3-L engine equipped with a four-speed automatic transmission and complete drive system was calibrated to meet 1974 emissions standards using Indolene reference fuel. This standardized apparatus was then used in conjunction with the federal emissions test procedure to evaluate the performance of methanol/gasoline blends. Results of the single cylinder test program and preliminary evaluations with the chassis dynamometer system indicated that blends should be limited to 10% methanol or less to avoid drive-ability and other problems. A complete discussion of the apparatus and test procedures is given in Ref. 9. 

Figure 111. Emission of aldehydes, acrolein and various polynuclear aromatic hydrocarbons of two passenger cars equipped with an IDI/NA and with a DI/NA diesel engine, once without and once with a diesel oxidation catalyst, in the US-FTP 75 vehicle test cycle (monolith catalyst with 62 cells cm dedicated diesel washcoat formulation with a platinum loading of 1.76 g 1 in the fresh state vehicle dynamometer tests according to the US-FTP 75 vehicle test procedure, with passenger cars equipped with a DI/NA and with an IDI/NA diesel engine of displacement 2.0 1). Reprinted with permission from ref [70], 1990 Society of Automotive Engineers, Inc.

Brake dynamometers were available, but, although the Germans must have had many in engineering testing laboratories, they are not readily available. They are not the kind of equipment that one finds in auto repair shops even today. They cost far more than the engines to which they are attached, since they are not mass-produced - at least not at that time. 

Final test results were performed on a chassis dynamometer according to the European MVEG-A test procedure. The passenger car used had a inertia weight of 1500 kg and was equipped with a 2.5 1 DI/TC four cylinder diesel engine. 

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