Influence of structure and other characteristics of substitute fuel components in petrol on engine efficiency and pollution
The preparation of five base fuels and the assessment of their behaviour in the presence of additives and fuel extenders is described. Details are given of the preparation and testing of a number of novel compounds with these base fuels. Various families of compounds were investigated and the changes in their BRON performance were examined by altering the basic molecule slightly, e.g. by adding or subtracting known groups to a specified position of the structure. Such groups of compounds included equivalent alcohols and amines, novel ethers, furans, phenols and formamides. The investigation focussed on compounds with a potential anti-knock activity. Finally, the CFR engine was used in the measurement of exhaust emissions under variable compression ratios. The results confirmed the importance of maintaining adequate ignition quality in petrol, not only for engine efficiency purposes, but also in order to avoid increased emissions, particularly of unburnt hydrocarbons. The use of a variety of materials at the multicylinder SI engine test rig at Sheffield University pointed to the possibility of achieving fuel economy and lower exhaust emissions by judicious choice of the appropriate fuel extenders.
Bibliographic Reference: EUR 13157 EN (1991) 157 pp., MF, ECU 8, blow-up copy ECU 20
Record Number: 199110457 / Last updated on: 1994-12-02
Original language: en
Available languages: en