Method and arrangement for checking the operability of a fluid-f

Details Method and arrangement for checking the operability of a fluid-f Method and arrangement for checking the operability of a fluid-f

1993-04-22

1995-02-14

Cross, E. Rollins

Internal-combustion engines

Charge forming device

Having fuel vapor recovery and storage system

123571, G01M 1500, F02M 3302

Patent

active

053885589

ABSTRACT:
The invention is directed to a method for checking the operability of a conduit system conducting a fluid flow. The conduit system is for an internal combustion engine and utilizes two fluids having temperatures which are different from each other. In this way, it is possible to set quite well-defined measuring conditions. The fluid flow in the conduit system to be checked is coupled to the temperature sensor in such a manner that the temperature thereof changes with a relatively steep gradient when, starting at a specific time point, the above-mentioned fluid operates to warm the temperature sensor. When the magnitude of the gradient remains below a threshold value, the conduit system checked is evaluated to be operational. The measurement is reliable even though it requires only a single temperature sensor.

REFERENCES:
patent: 4962744 (1990-10-01), Uranishi et al.
patent: 4967717 (1990-11-01), Miyazaki et al.
patent: 4974572 (1990-12-01), Aramaki
patent: 5243944 (1993-09-01), Blumenstock

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