How to calculate and display driving fuel economy, economic fuel economy and economic speed

摘要

Disclosed are a method for calculating and displaying driving fuel economy, economic fuel economy and economic speed of a motor vehicle. The method includes measuring a current load and a rotation speed of the engine, detecting a fuel consumption rate of the engine by applying the load and the rotation speed of the engine to an engine map input to an engine ECU, and measuring the fuel consumption rate of the engine in the current vehicle. Calculating a current driving fuel efficiency by calculating a fuel consumption rate of the engine; detecting an economic fuel consumption rate of the engine from a running resistance curve and an equivalent fuel consumption curve of the engine, detecting an engine speed corresponding to the economic fuel consumption rate, Calculating the speed of the vehicle corresponding to the engine speed as the economic speed, calculating the fuel economy of the vehicle by calculating the economic fuel consumption rate of the engine with respect to the speed of the vehicle, and the current fuel economy and fuel economy; And displaying a traveling speed for running at the economical fuel economy. According to the method, since the driver can recognize the current driving fuel economy, economic fuel economy and economic speed according to the road conditions, there is an advantage that the vehicle can be driven at economic fuel economy speed.