AS 2077-1982

FOREWORDSECTION 1. SCOPE AND GENERAL 1.1 Scope 1.2 Application 1.3 Referenced Documents 1.4 DefinitionsSECTION 2. GENERAL REQUIREMENTS 2.1 Test Materials 2.2 Test Conditions 2.3 Driving Requirements 2.4 Measurement of Fuel Consumption by Exhaust Gas Analysis 2.5 Measurement of Fuel Consumption by Volumetric or Gravimetric Methods 2.6 Recording of Test Conditions and Results 2.7 Calculation of Fuel ConsumptionSECTION 3. PERFORMANCE OF THE TESTS 3.1 City Cycle Test 3.2 Highway Cycle TestAPPENDICES A City Driving Cycle B Highway Driving Cycle C Exhaust Gas Sampling and Analysis Systems D Recording of Test Conditions and Test Results E Methods for Calculation of Fuel Consumption F Typical Calculation by Exhaust Gas Analysis Method G Variability of Fuel ConsumptionANNEX - LIST OF REFERENCED DOCUMENTS

Sets out test methods for measuring the fuel consumption of petrol, diesel and LP gas-fuelled vehicles under controlled conditions simulating city driving conditions and highway driving conditions. Measurement of the fuel consumed is made either by analysis of the exhaust gases and evaluation of the amount of carbon in them in terms of the amount of carbon in unburnt fuel, or by direct measurement of the volume, or mass, of fuel consumed, since a comparable degree of accuracy may be obtained by each of these methods. Test fuel specifications are given.

This standard sets out test methods for measuring the fuel consumption of passenger cars, their derivatives and multi-purpose passenger cars under controlled procedures simulating city and high way driving conditions. Measurement of the fuel consumed is made either by analysis of the exhaust gases and evaluation of the amount of carbon in them in terms of the amount of carbon in unburnt fuel, or by direct measurement of the volume, or mass, of fuel consumed, since a comparable degree of accuracy may be obtained by using each of these methods.The tests specified are intended for use on vehicles having either four-stroke, spark-ignition, petrol-fuelled or LP gas-fuelled internal combustion engines, or four-stroke, compression-ignition, diesel-fuelled internal combustion engines. The tests are used to obtain values of fuel consumption for passenger cars, their derivatives and multi-purpose passenger cars, for the purpose of making comparisons between different makes and models. So that the values obtained will be indicative of those to be expected under reasonable service conditions, driving cycles are included that represent the driving conditions experienced in city driving and highway driving.

Obsolescent 4 April 2002