Vehicle diagnosis system and method

• US 10,351,127 B2
• Filed: 12/06/2016
• Issued: 07/16/2019
• Est. Priority Date: 12/25/2013
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Ohsaki, Satoru
• Primary Examiner(s): Badii, Behrang
• Assistant Examiner(s): Testardi, David A
• Application Number:
  US15/369,927
• Publication Number:
  US 20170084093A1
• Time in Patent Office: 952 Days
• CPC Class Codes: B60L 15/2009 for braking
• CPC Class Codes: B60R 16/0236 for economical driving
• CPC Class Codes: B60T 17/221 Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems hydraulic pressure systems in general F15B19/00, F15B21/04; testing structures or apparatus G01M
• CPC Class Codes: B60W 20/50 Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
• CPC Class Codes: B60W 30/18018 Start-stop drive, e.g. in a traffic jam
• CPC Class Codes: B60W 30/18127 Regenerative braking
• CPC Class Codes: B60W 30/192 Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
• CPC Class Codes: F02D 41/042 for stopping the engine
• CPC Class Codes: F02D 41/22 Safety or indicating devices for abnormal conditions in air/fuel ratio feedback systems F02D41/1495, in electric control linkage F02D11/107, in purge control systems F02M25/0809
• CPC Class Codes: F02D 41/26 using computer, e.g. microprocessor
• CPC Class Codes: F02N 11/0818 Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
• CPC Class Codes: F02N 11/0825 related to prevention of engine restart failure, e.g. disabling automatic stop at low battery state
• CPC Class Codes: G07C 5/00 Registering or indicating the working of vehicles
• CPC Class Codes: G07C 5/004 Indicating the operating range of the engine economical driving B60R16/0236, F02B77/084; measuring liquid fuel of an engine G01F9/00
• CPC Class Codes: G07C 5/0808 Diagnosing performance data testing of vehicles G01M17/00; testing of electrical installation on vehicles G01R31/005
• CPC Class Codes: G07C 5/0816 Indicating performance data, e.g. occurrence of a malfunction
• CPC Class Codes: G07C 5/0825 using optical means
• CPC Class Codes: Y02T 10/40 Engine management systems
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y10S 903/904 Component specially adapted for hev

Abstract

A vehicle diagnosis system determines whether a vehicle has an abnormality in a temporal engine stop function or a power regeneration function that negates a greenhouse gas reduction effect of the engine. When the vehicle diagnosis system determines an abnormality, the vehicle diagnosis system provides a notification of the abnormality.

Claims

1. A vehicle diagnosis system for performing a diagnosis-related process for a vehicle that has an electric power regeneration function that is performed by using a generator in a certain condition satisfied state, the vehicle diagnosis system comprising:

a prerequisite determiner configured to determine whether a prerequisite condition for performing an electric power regeneration is satisfied;

a requisite determiner configured to determine whether a requisite condition for performing the electric power regeneration is satisfied, the requisite condition being different from the prerequisite condition;

a regeneration requester configured to request a regeneration controller to perform the electric power regeneration, the regeneration controller being configured to control the electric power regeneration based on a determination result of the prerequisite determiner and a determination result of the requisite determiner;

an event counter configured to count events to obtain an event count, an event being where the requisite condition is determined to be satisfied by the requisite determiner, the event count being based on one of;

a number of occurrences of the events in a prerequisite satisfaction expected state, or

a duration of the occurrences of the events in the prerequisite satisfaction expected state;

an operation counter configured to count operations to obtain an operation count, the operations counted being either (i) electric power regeneration operations actually performed or (ii) a duration of the electric power regeneration operations performed; and

a vehicle diagnoser configured to determine an abnormality in the electric power generation based on the event count and the operation count and output a signal corresponding to the event count and the operation count.

2. The vehicle diagnosis system of claim 1, wherein

the event counter is further configured to obtain the event count by counting a number of trips during which the events occur, and

the operation counter is further configured to obtain the operation count by counting a number of trips during which the operations occur.

3. The vehicle diagnosis system of claim 1, wherein

the event counter is further configured to obtain the event count by counting an electric power to be generated in response to the occurrences of the events, and

the operation counter is further configured to obtain the operation count by counting the electric power generated by the electric power regeneration operations.

4. The vehicle diagnosis system of claim 1, wherein

the vehicle has a storage battery that is electrically connected to the generator,

the event counter is further configured to obtain the event count by counting a regenerative electric power to be output from the generator to the storage battery in response to the occurrences of the events, and

the operation counter is further configured to obtain the operation count by counting the electric power output from the generator to the storage battery by the electric power regeneration operations.

5. The vehicle diagnosis system of claim 1, wherein

the event counter is further configured to obtain the event count by counting an electric power request by a controller of the generator in response to the occurrences of the events, and

the operation counter is further configured to obtain the operation count by counting the requested electric power sent to the controller of the generator by the electric power regeneration operations.

6. The vehicle diagnosis system of claim 1, wherein

the event counter is further configured to obtain the event count by counting a travel distance of the vehicle while the events are occurring, and

the operation counter is further configured to obtain the operation count by counting the travel distance of the vehicle while the regeneration operations are occurring.

7. The vehicle diagnosis system of claim 1, wherein

the event count further includes

a number of occurrences of events in a prerequisite satisfied state.

8. A vehicle diagnosis system for performing a diagnosis for a vehicle that has an electric power regeneration function that is performed by using a generator in a certain condition satisfied state, the vehicle diagnosis system comprising:

a prerequisite determiner configured to determine whether a prerequisite condition for performing an electric power regeneration is satisfied;

a requisite determiner configured to determine whether a requisite condition for performing the electric power regeneration is satisfied, the requisite condition being different from the prerequisite condition;

a regeneration requester configured to request a regeneration controller to perform the electric power regeneration, the regeneration controller being configured to control the electric power regeneration based on a determination result of the prerequisite determiner and a determination result of the requisite determiner;

an event counter configured to count events to obtain an event count, an event being where the requisite condition is determined to be satisfied by the requisite determiner, the event count being one of;

a number of occurrences of the events in a prerequisite satisfaction expected state, or

a duration of the occurrences of the events in the prerequisite satisfaction state;

an operation counter configured to count operations or to obtain an operations count, the operations counted being either (i) electric power regeneration operations actually performed or (ii) a duration of the electric power regeneration operations performed; and

a vehicle diagnoser configured to determine, based on the event count and the operation count, whether an abnormality of the electric power regeneration function is a caused where a greenhouse gas reduction effect of the electric power regeneration function is cancelled.

9. A vehicle diagnosis system for performing a diagnosis-related process for a vehicle that has an electric power regeneration function that is performed by using a generator in a certain condition satisfied state, the vehicle diagnosis system comprising:

a prerequisite determiner determining whether a prerequisite condition for performing an electric power regeneration is satisfied;

a requisite determiner determining whether a requisite condition for performing the electric power regeneration is satisfied, the requisite condition being different from the prerequisite condition;

a regeneration requester requesting a regeneration controller to perform the electric power regeneration, the regeneration controller controlling the electric power regeneration based on a determination result of the prerequisite determiner and a determination result of the requisite determiner;

an event counter configured to count events to obtain an event count, an event being where the requisite condition is determined to be satisfied by the requisite determiner, the event count one of;

a number of occurrences of the events in a prerequisite satisfaction expected state, or

a duration of the occurrences of the events in the prerequisite satisfaction expected state;

a missing regeneration counter configured to count missing power regeneration operations to obtain a missing power regeneration operation count, the missing power regeneration operations being where the electric power regeneration operations are not performed after the occurrences of the events, the missing power regeneration operation count being either (i) a number of missing power regeneration operations or (ii) a duration of missing power regeneration operations; and

a vehicle diagnoser configured to

either output a signal corresponding to the event count and the missing power regeneration operation count, or

determine whether an abnormality of the vehicle is caused based on the event count and the missing power regeneration operation count.

10. A vehicle diagnosis system for performing a diagnosis-related process for a vehicle that has an electric power regeneration function that is performed by using a generator in a certain condition satisfied state, the vehicle diagnosis system comprising:

a prerequisite determiner configured to determine whether a prerequisite condition for performing an electric power regeneration is satisfied;

a requisite determiner configured to determine whether a requisite condition for performing the electric power regeneration is satisfied, the requisite condition being different from the prerequisite condition;

a regeneration requester configured to request a regeneration controller to perform the electric power regeneration, the regeneration controller being configured to control the electric power regeneration based on a determination result of the prerequisite determiner and a determination result of the requisite determiner;

an event counter configured to count events and to obtain an event count, an event being where the requisite condition is determined to be satisfied by the requisite determiner in a prerequisite satisfaction expected state, and the even count being a number of occurrences of the events;

a missing regeneration counter configured to count missing power regeneration operations to obtain a missing power regeneration operation count, the missing power regeneration operations being where the electric power regeneration operations are not performed after the occurrences of the events, the missing power regeneration operation count being either (i) a number of missing power regeneration operations or (ii) a duration of missing power regeneration operations; and

a vehicle diagnoser configured to

either output a signal corresponding to the event count and the missing power regeneration operation count, or

determine whether an abnormality of the vehicle is caused based on the event count and the missing power regeneration operation count.

11. A method of performing a diagnosis for a vehicle that has an electric power regeneration function that is performed by using a generator in a certain condition satisfied state, the method comprising:

determining whether a prerequisite condition for performing an electric power regeneration is satisfied;

determining whether a requisite condition for performing the electric power regeneration is satisfied, the requisite condition being different from the prerequisite condition;

requesting the generator to perform the electric power regeneration based on a determination result of the prerequisite condition and a determination result of the requisite condition;

counting events and obtaining an event count, an event being where the requisite condition is determined to be satisfied, the event count being based on either (i) a number of occurrences of the events in a prerequisite satisfaction expected state, or (ii) a duration of the occurrences of the events in the prerequisite satisfaction expected state;

counting operations or obtaining an operations count, the operations counted being either (i) electric power regeneration operations actually performed or (ii) a duration of the electric power regeneration operations performed; and

determining, based on the event count and the operation count, whether an abnormality of the electric power regeneration function is caused where a greenhouse gas reduction effect is cancelled.

12. The method of claim 11, wherein

the event count is obtained by counting a number of trips during which the events occur, and

the operation count is obtained by counting a number of trips during which the operations occur.

13. The method of claim 11, wherein

the event count is obtained by counting an amount of regenerated electric power to be generated in response to the occurrences of the events, and

the operation count is obtained by counting the electric power generated by the electric power regeneration operations.

14. The method of claim 11, wherein

the vehicle has a storage battery that is electrically connected to the generator, the event count is obtained by counting a regenerated electric power to be output to the storage battery from the generator in response to the occurrences of the events, and

the operation count is obtained by counting the electric power output to the storage battery from the generator by the regeneration operations.

15. A vehicle diagnosis system for performing a diagnosis-related process for a vehicle that has an electric power regeneration function that is performed by using a generator in a certain condition satisfied state, the vehicle diagnosis system comprising:

a prerequisite determiner configured to determine whether a prerequisite condition for performing an electric power regeneration is satisfied;

a requisite determiner configured to determine whether a requisite condition for performing the electric power regeneration is satisfied, the requisite condition being different from the prerequisite condition;

a regeneration requester configured to request a regeneration controller to perform the electric power regeneration, the regeneration controller being configured to control the electric power regeneration based on a determination result of the prerequisite determiner and a determination result of the requisite determiner;

an event counter configured to count events to obtain an event count, an event being where the requisite condition is determined satisfied by the requisite determiner, the event count being one of;

a number of occurrences of the events in a prerequisite satisfaction expected state,

a duration of the occurrences of the events in the prerequisite satisfaction expected state, or

a number of the occurrences of the events in a prerequisite satisfied state;

an operation counter configured to count operations to obtain an operation count, the operations counted being either (i) electric power regeneration operations actually performed or (ii) a duration of the electric power regeneration operations performed; and

a vehicle diagnoser configured to determine an abnormality in the electric power generation based on the event count and the operation count and output the event count and the operation count to an external device via a communicator of the vehicle.