Systems and vehicles for determining an operational status of at least one trailer brake
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01M-017/00
B60T-017/22
출원번호
US-0780278
(2013-02-28)
등록번호
US-8818620
(2014-08-26)
발명자
/ 주소
Sitarski, Nicholas Scott
출원인 / 주소
Toyota Motor Engineering & Manufacturing North America, Inc.
대리인 / 주소
Dinsmore & Shohl LLP
인용정보
피인용 횟수 :
0인용 특허 :
7
초록▼
Systems and vehicles for determining an operational status of at least one trailer brake are provided. A system for determining an operational status of at least one trailer brake includes machine readable instructions stored in one or more memory modules that, when executed by one or more processor
Systems and vehicles for determining an operational status of at least one trailer brake are provided. A system for determining an operational status of at least one trailer brake includes machine readable instructions stored in one or more memory modules that, when executed by one or more processors, cause the system to command a trailer brake current output circuit to intermittently supply a diagnostic current to the at least one trailer brake during a trailer brake activation period, receive a sensed current signal from a trailer brake current sensing circuit in response to the command to supply the diagnostic current, and determine the operational status of the at least one trailer brake based on the sensed current signal.
대표청구항▼
1. A system for determining an operational status of at least one trailer brake comprising: one or more processors;one or more memory modules communicatively coupled to the one or more processors;a trailer brake current output circuit electrically coupled to the at least one trailer brake and commun
1. A system for determining an operational status of at least one trailer brake comprising: one or more processors;one or more memory modules communicatively coupled to the one or more processors;a trailer brake current output circuit electrically coupled to the at least one trailer brake and communicatively coupled to the one or more processors;a trailer brake current sensing circuit electrically coupled to the at least one trailer brake and communicatively coupled to the one or more processors;a trailer brake activation input circuit communicatively coupled to the one or more processors;machine readable instructions stored in the one or more memory modules that cause the system to perform at least the following when executed by the one or more processors: command the trailer brake current output circuit to intermittently supply a diagnostic current to the at least one trailer brake during a trailer brake activation period and during a non-activation period, wherein a trailer brake activation signal is received from the trailer brake activation input circuit during the trailer brake activation period;receive a sensed current signal from the trailer brake current sensing circuit in response to the command to supply the diagnostic current; anddetermine the operational status of the at least one trailer brake based on the sensed current signal. 2. The system of claim 1, wherein the machine readable instructions stored in the one or more memory modules that cause the system to command the trailer brake current output circuit to intermittently supply the diagnostic current to the at least one trailer brake cause the system to: provide a pulse-width-modulated diagnostic current command signal to the trailer brake current output circuit, wherein the trailer brake current output circuit supplies the diagnostic current to the at least one trailer brake based on the pulse-width modulated diagnostic current command signal. 3. The system of claim 2, further comprising a diagnostic current command conductor and an activation current command conductor, wherein the diagnostic command is provided by the diagnostic current command conductor and the activation current command is provided by the activation current command conductor. 4. The system of claim 2, wherein the machine readable instructions stored in the one or more memory modules further cause the system to: provide a pulse-width-modulated brake activation current command signal to the trailer brake current output circuit in response to receiving the trailer brake activation signal from the trailer brake activation input circuit, wherein the trailer brake current output circuit supplies a brake activation current to the at least one trailer brake based on the pulse-width modulated brake activation current command signal, wherein the pulse-width modulated brake activation current command signal has a first voltage level and a first frequency, wherein the pulse-width modulated diagnostic current command signal has a second voltage level and a second frequency, and wherein the first voltage level is greater than the second voltage level and the second frequency is greater than the first frequency. 5. The system of claim 4, wherein the machine readable instructions stored in the one or more memory modules that cause the system to determine the operational status of the at least one trailer brake based on the sensed current signal cause the system to: determine that the at least one trailer brake is unconnected from the system when the sensed current signal is indicative of a sensed current below a connection threshold. 6. The system of claim 4, wherein the machine readable instructions stored in the one or more memory modules that cause the system to determine the operational status of the at least one trailer brake based on the sensed current signal cause the system to: determine that a short circuit condition exists when the sensed current signal is indicative of a sensed current above a short circuit threshold. 7. The system of claim 1, wherein the machine readable instructions stored in the one or more memory modules that cause the system to command the trailer brake current output circuit to intermittently supply the diagnostic current to the at least one trailer brake cause the system to: command the trailer brake current output circuit to intermittently supply the diagnostic current to the at least one trailer brake at random times. 8. The system of claim 1, wherein the diagnostic current is below an activation threshold. 9. A system for determining an operational status of at least one trailer brake comprising: one or more processors;one or more memory modules communicatively coupled to the one or more processors;a trailer brake current output circuit electrically coupled to the at least one trailer brake and communicatively coupled to the one or more processors;a trailer brake current sensing circuit electrically coupled to the at least one trailer brake and communicatively coupled to the one or more processors;a trailer brake activation input circuit communicatively coupled to the one or more processors;machine readable instructions stored in the one or more memory modules that cause the system to perform at least the following when executed by the one or more processors: command the trailer brake current output circuit to intermittently supply a diagnostic current to the at least one trailer brake during a trailer brake activation period, wherein a trailer brake activation signal is received from the trailer brake activation input circuit during the trailer brake activation period;receive a sensed current signal from the trailer brake current sensing circuit in response to the command to supply the diagnostic current; anddetermine the operational status of the at least one trailer brake based on the sensed current signal. 10. The system of claim 9, wherein the machine readable instructions stored in the one or more memory modules that cause the system to determine the operational status of the at least one trailer brake based on the sensed current signal cause the system to: determine that the at least one trailer brake is unconnected from the system when the sensed current signal is indicative of a sensed current below a connection threshold. 11. The system of claim 9, wherein the machine readable instructions stored in the one or more memory modules that cause the system to determine the operational status of the at least one trailer brake based on the sensed current signal cause the system to: determine that a short circuit condition exists when the sensed current signal is indicative of a sensed current above a short circuit threshold. 12. The system of claim 9, wherein the machine readable instructions stored in the one or more memory modules that cause the system to command the trailer brake current output circuit to intermittently supply the diagnostic current to the at least one trailer brake cause the system to: command the trailer brake current output circuit to intermittently supply the diagnostic current to the at least one trailer brake at random times. 13. The system of claim 9, wherein the machine readable instructions stored in the one or more memory modules that cause the system to command the trailer brake current output circuit to intermittently supply the diagnostic current to the at least one trailer brake cause the system to: provide a pulse-width-modulated diagnostic current command signal to the trailer brake current output circuit, wherein the trailer brake current output circuit supplies the diagnostic current to the at least one trailer brake based on the pulse-width modulated diagnostic current command signal. 14. The system of claim 13, wherein the trailer brake current output circuit includes at least one transistor. 15. The system of claim 13, wherein the machine readable instructions stored in the one or more memory modules further cause the system to: provide a pulse-width-modulated brake activation current command signal to the trailer brake current output circuit in response to receiving a trailer brake activation signal from the trailer brake activation input circuit, wherein the trailer brake current output circuit supplies a brake activation current to the at least one trailer brake based on the pulse-width modulated brake activation current command signal, wherein the pulse-width modulated brake activation current command signal has a first voltage level and a first frequency, wherein the pulse-width modulated diagnostic current command signal has a second voltage level and a second frequency, and wherein the first voltage level is greater than the second voltage level and the second frequency is greater than the first frequency. 16. The system of claim 9, wherein the diagnostic current is below an activation threshold. 17. A vehicle for determining an operational status of at least one trailer brake of a trailer towed by the vehicle, the vehicle comprising: one or more processors;one or more memory modules communicatively coupled to the one or more processors;a trailer brake current output circuit electrically coupled to the at least one trailer brake and communicatively coupled to the one or more processors;a trailer brake current sensing circuit electrically coupled to the at least one trailer brake and communicatively coupled to the one or more processors;a trailer brake activation input circuit communicatively coupled to the one or more processors;machine readable instructions stored in the one or more memory modules that cause the vehicle to perform at least the following when executed by the one or more processors: command the trailer brake current output circuit to intermittently supply a diagnostic current to the at least one trailer brake during a trailer brake activation period and during a non-activation period, wherein a trailer brake activation signal is received from the trailer brake activation input circuit during the trailer brake activation period;receive a sensed current signal from the trailer brake current sensing circuit in response to the command to supply the diagnostic current; anddetermine the operational status of the at least one trailer brake based on the sensed current signal. 18. The vehicle of claim 17, wherein the machine readable instructions stored in the one or more memory modules that cause the vehicle to command the trailer brake current output circuit to intermittently supply the diagnostic current to the at least one trailer brake cause the vehicle to: provide a pulse-width-modulated diagnostic current command signal to the trailer brake current output circuit, wherein the trailer brake current output circuit supplies the diagnostic current to the at least one trailer brake based on the pulse-width modulated diagnostic current command signal. 19. The vehicle of claim 17, wherein the machine readable instructions stored in the one or more memory modules further cause the vehicle to: provide a pulse-width-modulated brake activation current command signal to the trailer brake current output circuit in response to receiving the trailer brake activation signal from the trailer brake activation input circuit, wherein the trailer brake current output circuit supplies a brake activation current to the at least one trailer brake based on the pulse-width modulated brake activation current command signal, wherein the pulse-width modulated brake activation current command signal has a first voltage level and a first frequency, wherein the pulse-width modulated diagnostic current command signal has a second voltage level and a second frequency, and wherein the first voltage level is greater than the second voltage level and the second frequency is greater than the first frequency. 20. The vehicle of claim 17, wherein the machine readable instructions stored in the one or more memory modules that cause the vehicle to command the trailer brake current output circuit to intermittently supply the diagnostic current to the at least one trailer brake cause the vehicle to: command the trailer brake current output circuit to intermittently supply the diagnostic current to the at least one trailer brake at random times.
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이 특허에 인용된 특허 (7)
Melendez Robert, Diagnostic trailer center device.
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