The consideration of road longitudinal slopes in automobile fuel consumption rationing

Abstract

Nowadays the consideration of longitudinal slope when rationing automobile fuel consumption is hardly taken into account, and it is received just impliedly when paying attention to the area relief. Along with this, the influence of slopes of flat and slightly hilly terrain on fuel consumption is not taken into consideration at all. This article presents an easy calculation approach to the consideration of the quantitative effects of road slope angels (rise and descent) on the final fuel consumption of a vehicle on real routes. The notion of a reduced slope angle is inroduced,a substantial increase of fuel consumption on descents in comparison with rises is ascertained.

Effect of Gear Usage on the Fuel Consumption of Light Duty Vehicle by Using On-Board Diagnostics (OBD) DataEffect of Gear Usage on the Fuel Consumption of Light Duty Vehicle by Using On-Board Diagnostics (OBD) Data

“…By the reasoning above it is understood that the gear-shifting process does affect vehicle speed directly due to a low propulsion during gear shift. But more importantly, as discovered by Borisov et al, [14] by gearing down early a high engine speed and consequently a high engine power are obtained throughout the slope, and the case can accordingly keep a higher vehicle speed throughout the uphill.…”