Method of determining the purge canister mass

Details Method of determining the purge canister mass Method of determining the purge canister mass

1999-01-15

2000-04-11

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123698, 123674, F02M 3704

Patent

active

060476885

ABSTRACT:
A method is provided for accommodating the purge vapors from an evaporative emission control system of an automotive vehicle. The method includes a means of learning changes in the mass of a purge vapor collection canister such that a mass of purge vapor in the canister can be determined. The canister model uses the output of a strategic adaption routine to learn the loading of the canister. Thereafter, the canister model uses the learned loading of the canister and tank flow rate from a tank model to compute the mass balance of purge vapor exiting and entering the canister. The concentration level is compared to the calibrated maximum in an open loop surface to determine the level of canister loading. Based on the current loading of the canister, the open loop surface of canister concentration as a function of flow rate and accumulated flow is used to predict how the concentration will change as the flow rate through the canister changes. As such, the fuel to air ratio delivered through the injectors can be adjusted in real time to improve drivability and emissions.

REFERENCES:
patent: 4821701 (1989-04-01), Nankee, II et al.
patent: 5245978 (1993-09-01), Orzel
patent: 5299544 (1994-04-01), Kitamoto et al.
patent: 5373822 (1994-12-01), Thompson
patent: 5495749 (1996-03-01), Dawson et al.
patent: 5606121 (1997-02-01), Blomquist et al.
patent: 5616836 (1997-04-01), Blomquist et al.
patent: 5635630 (1997-06-01), Dawson et al.
patent: 5641899 (1997-06-01), Blomquist et al.
patent: 5651350 (1997-07-01), Blomquist et al.
patent: 5685279 (1997-11-01), Blomquist et al.
patent: 5715799 (1998-02-01), Blomquist et al.
patent: 5746187 (1998-05-01), Ninomiya et al.
patent: 5875765 (1999-03-01), Norton

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