Method and device for displaying fuel economy state of car engine

Abstract

The invention discloses a method for displaying a fuel economy state of a car engine, comprising the steps of calibrating a fuel economy state MAP by an engine universal characteristic test, putting the map to an ECU (electronic control unit) in advance; obtaining present rotation speed and torque of an engine by the ECU, and finding the fuel economy state obtained by the MAP in a present state; generating a fuel economy state message and transmitting the message through a CAN (controller area network) bus; capturing the fuel economy state message from the CAN bus by a motormeter; analyzing and displaying the fuel economy state in the present state. The method can output the fuel economy state of the car engine in the present state in real time, enable a driver to know the state immediately to do purposeful operation, enable the car engine to work in an economical fuel consumption area, fully play the engine efficiency, reduce oil consumption and reduce environment pollution. On the basis, the invention also provides a device for displaying a fuel economy state of a car engine.

Description

technical field [0001] The invention relates to the technical field of electronically controlled engines, in particular to a method and device for displaying the fuel economy state of an automobile engine, which is used to display the fuel economy state of the engine under the current state in real time on the instrument panel of the automobile. Background technique [0002] As a modern means of transportation, automobiles (cars, passenger cars, and trucks, etc.) play an important role in our daily life and industrial production. With the gradual spread and deepening of the energy crisis all over the world, the price of fuel oil continues to rise, which has recently caused the running costs of automobiles to continue to increase. For this reason, how to give full play to the efficiency of automobile engines, reduce fuel consumption and reduce environmental pollution has become the focus of people's attention. [0003] As we all know, a car engine has its economical fuel con...

AI Technical Summary

Problems solved by technology

Obviously, during the process of upshifting and accelerating, the fuel economy has changed but the instantaneous fuel consumption rate has been increasing. Therefore, the method for displaying the fuel consumption of the vehicle provided in the prior art has certain limitations for the actual guidance of the driver. sex

In practical applications, even if the driver knows the instantaneous fuel consumption rate of the car engine in the current state, he cannot determine whether the car engine is working in the economical fuel consumption zone in the current state, let alone accurately know the fuel economy of the car engine in the current state. what is the state of sex

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