DEVICE FOR DIAGNOSING FUEL SAVING OPERATION, SYSTEM FOR DIAGNOSING FUEL SAVING OPERATION, CONTROLLER OF PRIME MOVER, DEVICE FOR SCORING FUEL SAVING OPERATION AND METHOD FOR DIAGNOSING FUEL SAVING OPERATION

摘要

An accelerator-off fuel-cut traveling determination section (11c) determines whether a vehicle (1a) is in an accelerator-off fuel-cut traveling mode where the engine rotation speed of the vehicle (1a) is at least a predetermined value, the throttle opening rate is at most a predetermined value, and fuel injection to an engine is 0.  If the vehicle (1a) is in an accelerator-off fuel-cut traveling mode, a traveling distance accumulation section (11d) accumulates an accelerator-off fuel-cut traveling distance.  A fuel saving operation scoring section (12) scores the operation by the operator based on each accumulation value accumulated by the traveling distance accumulation section (11d).  A fuel-saving-operation-advice creating section (13) notifies a fuel-saving-operation advice to the operator together with the scoring results according to the scoring results.  Recognition of fuel saving operation by the operator can be enhanced by encouraging the operator to use an engine brake in an earlier stage.