Patent · US Active

Method for checking operability, checking device and motor vehicle

US12049837B2 · kind B2 · utility

0Cited by

1References

10Claims

0Family size

Assignee

Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Andreas Bruhn · Puchheim, DE
Jens Brunner · Unterhaching, DE
Markus Wolf · Oftersheim, DE

Key dates

Filing date	Apr 20, 2021
Grant date	Jul 30, 2024
Priority date	—
Expiry date	Apr 20, 2041

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

A method for checking operability of a first metering unit includes sending a control signal to a second metering unit to dispense a second quantity; comparing the quantity dispensed with the second quantity; sending a control signal to a second metering unit to introduce a third quantity; detecting the pressure drop caused by the introduction of the third quantity; sending a control signal to the first metering unit to introduce a first quantity; detecting the pressure drop caused by executing the control signal to introduce the first quantity; and ascertaining that the first metering unit is not functioning correctly if a difference between the pressure drop detected as a result of the execution of the control signal to introduce the first quantity and the pressure drop detected as a result of the execution of the control signal to introduce the third quantity is above a threshold.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.