Throttle body sweep diagnostic system and method
View Patent ↗A throttle diagnostic system comprises a diagnostic device comprising a throttle sweep diagnostic module that generates N throttle position commands at a first predetermined interval, wherein the N throttle position commands differ by a predetermined interval. A vehicle control system comprises a throttle body assembly that receive the N throttle position commands and a throttle diagnostic module that performs diagnostics on the throttle body assembly at a second predetermined interval that is less than the first predetermined interval.
1. A throttle diagnostic system comprising:
a diagnostic device comprising a throttle sweep diagnostic module that generates N throttle position commands at first predetermined intervals, wherein the N throttle position commands differ by a predetermined interval, and wherein N is greater than or equal to 25; and
a vehicle control system comprising:
a throttle body assembly that receives the N throttle position commands; and
a throttle diagnostic module that performs diagnostics on the throttle body assembly at a second predetermined interval that is less than the first predetermined interval.
2. The throttle diagnostic system of claim 1 , wherein the N throttle position commands are equally spaced between a minimum throttle position and a maximum throttle position.
3. The throttle diagnostic system of claim 2 , wherein the minimum throttle position is 0% and the maximum throttle position is 100%.
4. The throttle diagnostic system of claim 1 , wherein the predetermined interval is 1%.
5. The throttle diagnostic system of claim 1 , wherein the first predetermined interval is between 1.25 and 1.5 times the second predetermined interval.
6. The throttle diagnostic system of claim 1 , wherein the first predetermined interval is between 250 and 300 ms and the second predetermined interval is 200 ms.
7. The throttle diagnostic system of claim 1 , wherein the diagnostic device resets at least one fault code prior to throttle sweep testing, and generates a wiring fault when the at least one fault code is generated again before the throttle sweep testing begins.
8. A throttle diagnostic system comprising:
a throttle sweep diagnostic module that sends N throttle position commands at first predetermined intervals to a throttle body assembly, wherein the N throttle position commands differ by a predetermined interval and wherein N is greater than or equal to 25; and
a throttle diagnostic module that performs diagnostics on the throttle body assembly at a second predetermined interval that is less than the first predetermined interval.
9. The throttle diagnostic system of claim 8 , wherein the N throttle position commands are equally spaced between a minimum throttle position and a maximum throttle position.
10. The throttle diagnostic system of claim 9 , wherein the minimum throttle position is 0% and the maximum throttle position is 100%.
11. The throttle diagnostic system of claim 8 , wherein the predetermined interval is 1%.
12. The throttle diagnostic system of claim 8 , wherein the first predetermined interval is between 1.25 and 1.5 times the second predetermined interval.
13. The throttle diagnostic system of claim 8 , wherein the first predetermined interval is between 250 and 300 ms and the second predetermined interval is 200 ms.
14. The throttle diagnostic system of claim 8 , wherein the throttle sweep diagnostic module resets at least one fault code prior to throttle sweep testing, and generates a wiring fault when the at least one fault code is generated again before the throttle sweep testing begins.
15. A throttle diagnostic method comprising:
generating N throttle position commands at first predetermined intervals, wherein the N throttle position commands differ by a predetermined interval and wherein N is greater than or equal to 25;
maintaining each the N throttle position commands during each of the corresponding ones of the first predetermined intervals;
receiving the N throttle position commands at a throttle body assembly; and
performing diagnostics on the throttle body assembly at a second predetermined interval that is less than the first predetermined interval.
16. The method of claim 15 , wherein the N throttle position commands are equally spaced between a minimum throttle position and a maximum throttle position.
17. The method of claim 16 , wherein the minimum throttle position is 0% and the maximum throttle position is 100%.
18. The method of claim 15 , wherein the predetermined interval is 1%.
19. The method of claim 15 , wherein the first predetermined interval is between 1.25 and 1.5 times the second predetermined interval.
20. The method of claim 15 , wherein the first predetermined interval is between 250 and 300 ms and the second predetermined interval is 200 ms.
21. The method of claim 15 , further comprising:
resetting at least one fault code prior to throttle sweep testing; and
generating a wiring fault when the at least one fault code is generated again before the throttle sweep testing begins.