Search Results

A simple, relatively short and inexpensive screening test method has been developed for evaluation of available detergent/dispersant diesel fuel additives. The screening test is based on experiments of running a laboratory diesel engine in a pre-determined regime(load cycle). The engine is a single cylinder, 4-stroke DI, naturally aspirated and air cooled. It is coupled to a generator feeding electrical heaters as the load. The test rig is controlled electronically to enable fully automatic test bench operation, including start/stop, load change, emergency shut-down, etc. The experiments were performed by running the engine on a reference base fuel and then the same fuel with different detergent additives. The nozzle of the fuel injector was checked for clogging by air flow measurements, using the ISO-4010 test rig.

Cross-flow heat exchangers, serving as hydride-containing reactors and aimed to absorb high temperature heat of exhaust gases, for the purpose of driving a hydrogen heat pump in the cooling mode were tested and described here. The heat transfer characteristics of the heat exchanger itself and the effects of engine exhaust gas were determined by tests in a stream of exhaust gas from a Diesel engine, with water circulating through the heat exchanger tubes. The performance of the heat exchanger as a reactor was investigated in a stream of hot gas-air mixture, which simulated engine exhaust gas. The tubes were filled with metal hydride LaNi4.7 Al0.3Hx powder and tested with and without hydrogen flowing through them.

The objective of this work was to demonstrate the possibility of adding a 3% methanol blend to the normal gasoline for the existing vehicle population in the climatic conditions of Israel. The fleet test was performed with the help of three public stations in which the methanol gasoline blend is sold to the general public on a voluntary basis. After ten months of operation with a sample of over 14000 vehicles the results are very encouraging and the acceptance of this blend among the drivers is very good. The extending possibility of adding a 3% methanol blend to the normal gasoline in all the public filling stations in Israel is the principal conclusion of this work.