Vehicular abnormality deecting device

• US 20040044449A1
• Filed: 08/15/2003
• Published: 03/04/2004
• Est. Priority Date: 08/29/2002
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Suzuki, Satoru
• Granted Patent: US 7,103,459 B2
• Time in Patent Office: Days
• US Class Current: 701/29
• CPC Class Codes: G01M 15/05 by combined monitoring of two or more different engine parameters

Abstract

Abnormality of a vehicle is detected while the vehicle is being parked. System normality is set when a tank internal pressure is K2 or more for time T1 or more. System abnormality is set when the tank internal pressure is K3 (K3<K2) or more and less than K2 after time T1 and a tank internal temperature variation is less than C1. System interim abnormality is set when an interim abnormality counter reaches M1. The interim abnormality counter is incremented when the tank internal pressure is less than K3 and other predetermined vehicle states suffice.

Claims

1. An abnormality detecting device for executing abnormality detecting of a vehicle while the vehicle is being parked, the abnormality detecting device comprising:

activating means for activating an electronic control unit of the vehicle so that the abnormality detecting is executed; and

interval setting means for setting a time interval at which the activating means activates the electronic control unit, based on a vehicular state.

2. The abnormality detecting device according to claim 1,

wherein the vehicular state relates to a traveling state where the vehicle traveled before the vehicle is parked.

3. The abnormality detecting device according to claim 1,

wherein the vehicular state includes a traveling distance for which the vehicle traveled before the vehicle is parked.

4. The abnormality detecting device according to claim 3,

wherein, when the traveling distance of the vehicle is long, the time interval is set as being short, and

wherein, when the traveling distance of the vehicle is short, the time interval is set as being long.

5. The abnormality detecting device according to claim 1,

wherein the vehicular state includes at least one of a cooling water temperature of an engine of the vehicle, an internal temperature of a fuel tank of the vehicle, and an intake air temperature.

6. The abnormality detecting device according to claim 1,

wherein the time interval is set based on a result of the preceding abnormality detecting.

7. The abnormality detecting device according to claim 1 ,

wherein the abnormality detecting is cancelled based on a result of the preceding abnormality detecting.

8. The abnormality detecting device according to claim 1,

wherein the time interval is set based on a result of an abnormality detecting of the vehicle that was executed while an engine of the vehicle was running before the vehicle is parked.

9. The abnormality detecting device according to claim 8,

wherein the abnormality detecting of the vehicle that was executed while the engine of the vehicle was running was executed while the vehicle was traveling.

10. The abnormality detecting device according to claim 1,

wherein the activating means is included in another electronic control unit consuming electric power less than the electronic control unit that is activated by the activating means.

11. The abnormality detecting device according to claim 1,

wherein the abnormality detecting is executed regarding airtightness of a fuel tank of the vehicle.

12. An abnormality detecting program for executing abnormality detecting of a vehicle while the vehicle is being parked, the abnormality detecting program comprising:

a step of setting a time interval at which an electronic control unit of the vehicle is activated, based on a vehicular state; and

a step of activating the electronic control unit of the vehicle at the time interval set at the step of setting the time interval so that the abnormality detecting is executed.

13. A storage media comprising an abnormality detecting program for executing abnormality detecting of a vehicle while the vehicle is being parked, the abnormality detecting program including:

a step of setting a time interval at which an electronic control unit of the vehicle is activated, based on a vehicular state; and

a step of activating the electronic control unit of the vehicle at the time interval set at the step of setting the time interval so that the abnormality detecting is executed.

14. An abnormality detecting method for executing abnormality detecting of a vehicle while the vehicle is being parked, the abnormality detecting method comprising:

a step of setting a time interval at which an electronic control unit of the vehicle is activated, based on a vehicular state; and

a step of activating the electronic control unit of the vehicle at the time interval set at the step of setting the time interval so that the abnormality detecting is executed.