Vapor recovery diagnostics
First Claim
1. A diagnostic system associated with a detection system capable of determining if a vehicle being fueled has vapor recovery capability, said diagnostic system comprising a control system adapted to:
- a. compare a function dependent on a number of fueling operations determined to involve a vehicle having vapor recovery capability with a reference value, and b. detect an error condition in the vapor recovery detection system if said function and said reference value differ by more than a defined amount.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for monitoring the operation of a vacuum assist vapor recovery system used in conjunction with the fueling of ORVR and non-ORVR equipped vehicles including establishing an expected number of ORVR fueling operations for a fuel dispenser during a defined interval; counting the actual number of ORVR fueling operations during said defined interval; comparing the actual number of fueling operations to the expected number of fueling operations; and permitting fueling operations to continue if the actual number is substantially equal to the expected number.
39 Citations
31 Claims
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1. A diagnostic system associated with a detection system capable of determining if a vehicle being fueled has vapor recovery capability, said diagnostic system comprising a control system adapted to:
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a. compare a function dependent on a number of fueling operations determined to involve a vehicle having vapor recovery capability with a reference value, and b. detect an error condition in the vapor recovery detection system if said function and said reference value differ by more than a defined amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A diagnostic system associated with a detection system capable of determining if a vehicle being fueled has vapor recovery capability, said diagnostic system comprising a control system adapted to:
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a. compare a function dependent on a ratio of a number of fueling operations determined to involve a vehicle having vapor recovery capability to a number of fueling operation determined to involve a vehicle without vapor recovery capability with a reference value, and b. detect an error condition in the vapor recovery detection system if said function and said reference value differ by more a defined amount. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method for providing diagnostics for a detection system capable of determining if a vehicle being fueled has vapor recovery capability, said diagnostic method comprising:
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a. comparing a function dependent on a number of fueling operations determined to involve a vehicle having vapor recovery capability with a reference value, and b. detecting an error condition in the vapor recovery detection system if said function and said reference value differ by more a defined amount.
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21. A diagnostic system associated with a detection system capable of determining if a vehicle being fueled has vapor recovery capability, said diagnostic system comprising a control system adapted to:
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a. compare with a reference value a function dependent on at least one of the group including;
i. the number of fueling operations determined to involve a vehicle having vapor recovery capability, ii. the number of fueling operations determined to involve vehicles having vapor recovery capability in relation to a total number of fueling operations, iii. the number of fueling operations determined to involve vehicles having vapor recovery capability in relation to a number of fueling operations determined to involve vehicles without vapor recovery capability, and iv. the number of fueling operations involving vehicles having vapor recovery capability within a select period of time;
b. detect an error condition in the vapor recovery detection system if said function and said reference value differ by more a defined amount.
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22. A method for monitoring the operation of a vacuum assist vapor recovery system used in conjunction with the fueling of ORVR and non-ORVR equipped vehicles comprising:
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a. establishing an expected number of ORVR fueling operations for a fuel dispenser during a given time interval;
b. counting the actual number of ORVR fueling operations during said given time interval;
c. comparing the actual number of ORVR fueling operations to the expected number of ORVR fueling operations; and
d. permitting fueling operations to continue if the actual number is substantially equal to the expected number. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A fuel dispenser including a vapor recovery system comprising:
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a. a dispenser sub-system capable of making an ORVR vehicle determination during a fueling operation;
b. a counter adapted to count the number of ORVR determinations made by said dispenser subsystem;
c. a storage location for storing an expected number of ORVR determinations to be made by said subsystem;
d. a diagnostic controller for comparing the actual number of fueling operations to the expected number of fueling operations wherein said controller is adapted to permit fueling operations to continue if the actual number is substantially equal to the expected number. - View Dependent Claims (30, 31)
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Specification