Patent ID: 9731697
Date: 2017-08-15
CPC Classifications: B60T,G01R

Claim:
1. A homogeneity detection circuit for detecting an incorrect operation of components of a valve driving system, the homogeneity detection circuit comprising: a first input for receiving a first signal being related to a voltage or a current of a first driving signal for driving a first valve; a second input for receiving a second signal being related to a voltage or a current of a second driving signal for driving a second valve; a comparison circuit for comparing the first signal with the second signal and for generating a warning signal if predetermined differences are detected between the first driving signal and the second driving signal, wherein the comparison circuit is configured to use only the first signal when the first valve receives the first driving signal in a test mode and to use only the second signal when the second valve receives the second driving signal in the test mode; and a third input for receiving, from a controller, a control signal indicating when the first valve and/or the second valve receive respective driving signals in the test mode.