Deceleration-running evaluating device

• US 20080234876A1
• Filed: 12/26/2007
• Published: 09/25/2008
• Est. Priority Date: 12/27/2006
• Status: Active Grant

• Current Assignee: Fujitsu Ten Limited (DENSO Corporation)
• Original Assignee: Fujitsu Ten Limited (DENSO Corporation)
• Inventors: Harumoto, Satoshi, Kiyo, Kouei, Matsuda, Yuusaku
• Granted Patent: US 8,229,610 B2
• Time in Patent Office: Days
• US Class Current: 701/1
• CPC Class Codes: B60W 40/10 related to vehicle motion

Abstract

A total distance calculating unit calculates a total running distance and an energy-cut-off distance calculating unit calculates a deceleration running distance of a vehicle. The deceleration running distance is a distance for which the vehicle runs while the vehicle is in a deacceleration state and no energy is supplied to a motor of the vehicle. A deceleration-running evaluating unit evaluates deceleration running of the vehicle based on a ratio of the deceleration running distance to the total running distance. The result of the evaluation is displayed for the driver of the vehicle.

Claims

1. An apparatus that evaluates a deceleration running of a vehicle, the deceleration running is a deacceleration state of the vehicle having an energy cut-off mechanism that cuts off energy supply to a motor of the vehicle during the deceleration running, the apparatus comprising:

a first calculating unit that calculates a first running distance of the vehicle during a predetermined period;

a detecting unit that detects an energy cut-off state in which the energy cut-off mechanism cuts-off energy supply to the motor;

a second calculating unit that calculates a second running distance of the vehicle, the second distance is a distance traveled by the vehicle while the vehicle is in the energy cut-off state during the predetermined period;

an evaluating unit that evaluates the deceleration running of the vehicle based on the first running distance and the second running distance; and

a notifying unit that notifies a result of evaluation obtained by the evaluating unit.

2. The apparatus according to claim 1, wherein the evaluating unit evaluates deceleration running of the vehicle based on a ratio of the second running distance to the first running distance.

3. The apparatus according to claim 1, further comprising:

a third calculating unit that calculates a third running distance, the third running distance is a distance run by the vehicle while the vehicle is in the deacceleration state during the predetermined period; and

a fourth calculating unit that calculates a fourth running distance, the fourth running distance is an ideal distance run by the vehicle while the vehicle is in the deacceleration state during the predetermined period, wherein

the evaluating unit evaluates deceleration running of the vehicle based on the third running distance and the fourth running distance.

4. The apparatus according to claim 3, wherein the evaluating unit evaluates deceleration running of the vehicle based on a ratio of the third running distance to the fourth running distance.

5. The apparatus according to claim 1, wherein the notifying unit includes a display unit that displays the result of evaluation.