Fig.5 Exhaust emission test results
Fleet test
Fleet tests of two light-duty methanol trucks were conducted for 16 months to investigate the affects on deterioration of various components and exhaust emissions. The experimental conditions and results are described as follows.
Experimental conditions
The specifications of the methanol vehicles tested were the same as shown in Table 5. The dye for methanol fuel was AB9. The concentration was 1 ppm, the same under the conditions of the storage test. Exhaust emissions of 10- 1 5 mode were measured at the beginning and end of the test for one vehicle. The main components which were investigated are as follows.
Components investigated：
Injection nozzle, ignition plug, fuel filter,lubricating oil, catalyst.
Experimental results
Table 6 shows the results of the fleet tests of two vehicles.
Table 6 Results of fleet tests
Fig.6 Exhaust emissions in fleet test
Exhaust emissions after the on-road test showed no major difference compared with the beginning of the test. It was found that methanol containing 1ppm AB9 has no influence on a deterioration of exhaust emissions.
After the on-road test, the main components of the methanol engine were investigated. No deterioration of injection nozzles, ignition plugs, fuel filter, lubricating oil, or catalyst caused by the dye was observed.
