Evaporative emissions system check valve monitor for gtdi engines
US-2018030932-A1 · Feb 1, 2018 · US
Method for detecting a sticking tank vent valve
US10166862B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10166862-B2 |
| Application number | US-201615746705-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 4, 2016 |
| Priority date | Jul 27, 2015 |
| Publication date | Jan 1, 2019 |
| Grant date | Jan 1, 2019 |
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- Title
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Abstract
Official abstract text for this publication.
A method for detecting a sticking tank vent valve in a motor vehicle, a temperature sensor being situated in a tank vent line between the tank vent valve and an inlet point into an intake manifold or into a turbocharger and sticking of the tank vent valve being detected when the absolute value of a correlation of a calculated tank ventilation mass flow and of a signal value of the temperature sensor violates a predefinable threshold value.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for detecting a sticking tank vent valve in a motor vehicle, a temperature sensor being situated in a tank vent line between the tank vent valve and an inlet point into an intake manifold or into a turbocharger, the method comprising: detecting a sticking of the tank vent valve when the absolute value of a correlation of a computed tank ventilation mass flow and of a signal value of the temperature sensor violates a predefinable threshold value. 2. The method as recited in claim 1 , wherein when the tank vent valve is being activated, a closed sticking of the tank vent valve is detected if the absolute value of the correlation of a computed tank ventilation mass flow and of the signal value of the temperature sensor falls below a predefinable threshold value. 3. The method as recited in claim 1 , wherein when the tank vent valve is not being activated, an open sticking of the tank vent valve is detected if the absolute value of the correlation of a computed tank ventilation mass flow and of the signal value of the temperature sensor exceeds a predefinable threshold value. 4. The method as recited in claim 1 , wherein diagnosing of the tank vent valve is discontinued when at least one operating condition of the motor vehicles changes by more than an applicable threshold value. 5. The method as recited in claim 4 , wherein the changing operating condition is at least one of a motor vehicle speed and an internal combustion engine speed. 6. The method as recited in claim 1 , wherein a signal of a reference temperature sensor, which is situated outside of the tank vent line, is taken into account when detecting a sticking tank vent valve. 7. A non-transitory machine-readable memory medium on which is stored a computer program for detecting a sticking tank vent valve in a motor vehicle, a temperature sensor being situated in a tank vent line between the tank vent valve and an inlet point into an intake manifold or into a turbocharger, the computer program, when executed by a control unit, causing the control unit to perform: detecting a sticking of the tank vent valve when the absolute value of a correlation of a computed tank ventilation mass flow and of a signal value of the temperature sensor violates a predefinable threshold value. 8. An electronic control unit for detecting a sticking tank vent valve in a motor vehicle, a temperature sensor being situated in a tank vent line between the tank vent valve and an inlet point into an intake manifold or into a turbocharger, the control unit configured to: detecting a sticking of the tank vent valve when the absolute value of a correlation of a computed tank ventilation mass flow and of a signal value of the temperature sensor violates a predefinable threshold value.
Assignees
Inventors
Classifications
Engine management systems · CPC title
returning to the fuel tank · CPC title
Control of the valve or purge actuator, e.g. duty cycle, closed loop control of position · CPC title
Estimating, calculating or determining the purging rate, amount, flow or concentration · CPC title
- F02D41/221Primary
relating to the failure of actuators or electrically driven elements · CPC title
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- What does patent US10166862B2 cover?
- A method for detecting a sticking tank vent valve in a motor vehicle, a temperature sensor being situated in a tank vent line between the tank vent valve and an inlet point into an intake manifold or into a turbocharger and sticking of the tank vent valve being detected when the absolute value of a correlation of a calculated tank ventilation mass flow and of a signal value of the temperature s…
- Who is the assignee on this patent?
- Bosch Gmbh Robert
- What technology area does this patent fall under?
- Primary CPC classification F02D41/221. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jan 01 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).