Patent ID: 7501940
Filing Date: 2009-03-10
Classification: B60C,G07C

Abstract:
1. A fuel efficiency degradation amount displaying device, comprising: a tire air pressure detecting unit for outputting a detection signal depending on a tire air pressure of a wheel attached to a vehicle; a fuel efficiency degradation amount specifying unit for specifying based on the outputted detection signal an amount of degradation of fuel efficiency of the vehicle compared to fuel efficiency of the vehicle in a case that the tire air pressure is appropriate; a displaying unit for displaying the specified amount of the degradation; and a low tire air pressure determination unit for making, based on the outputted detection signal, a determination whether the tire air pressure is below a predetermined threshold, wherein the displaying unit displays, based on the determination being affirmative, information indicating decrease of the tire air pressure; the fuel efficiency degradation amount determining unit specifies, based on the determination being negative, the amount of degradation of fuel efficiency; and the displaying unit changes the display thereof from the amount of degradation of fuel efficiency to the information indicating decrease of the tire pressure when the determination is changed from negative to affirmative.