METHOD FOR ASCERTAINING THE CHARGING OF A STORE FOR HYDROCARBONS

• US 20170030276A1
• Filed: 07/28/2016
• Published: 02/02/2017
• Est. Priority Date: 07/29/2015
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Knecht, Jochen, Schock, Guido, Herges, Thomas
• Application Number:
  US15/222,433
• Publication Number:
  US 20170030276A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F02D 2041/1433 using a model or simulation of the system
• CPC Class Codes: F02D 2200/0414 Air temperature
• CPC Class Codes: F02D 2200/0606 Fuel temperature
• CPC Class Codes: F02D 2200/703 Atmospheric pressure
• CPC Class Codes: F02D 41/0045 Estimating, calculating or determining the purging rate, amount, flow or concentration
• CPC Class Codes: F02M 25/0836 Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold
• CPC Class Codes: F02M 25/0854 Details of the absorption canister

Abstract

A method for ascertaining the charging of a store for hydrocarbons originating from a fuel tank of a vehicle is characterized in that the charging of the store is determined from a variable characterizing the fuel outgassing with the aid of a model which maps the vapor pressure curve of the fuel.

Claims

1. A method for ascertaining the charging of a store for hydrocarbons originating from a fuel tank of a vehicle, comprising:

determining the charging of the store from a variable characterizing fuel outgassing with the aid of a model which maps a vapor pressure curve of the fuel.

2. The method as recited in claim 1, wherein at least one of:

a variable characterizing a fuel temperature, and a variable characterizing a change in the fuel temperature over time, is determined, and is taken into account in ascertaining the variable characterizing the fuel outgassing.

3. The method as recited in claim 2, wherein at least one of:

the variable characterizing the fuel temperature, and the variable characterizing the change in the fuel temperature over time, is determined from at least one of a measured ambient temperature and a temperature model.

4. The method as recited in claim 1, wherein an ambient pressure is ascertained and used for correcting the model which maps the vapor pressure curve of the fuel.

5. The method as recited in claim 1, wherein an acceleration of the fuel tank is ascertained and used for correcting the model which maps the vapor pressure curve of the fuel.

6. The method as recited in claim 1, wherein at least one of:

a filling level of the fuel tank, and changes in the filling level of the fuel take, is ascertained, and the variable characterizing the fuel outgassing is ascertained as a function of the at least one of the filling level and the changes in the filling level.

7. A machine-readable memory medium on which is stored a computer program for ascertaining the charging of a store for hydrocarbons originating from a fuel tank of a vehicle, the computer program, when executed by a processor, causing the processor to perform:

determining the charging of the store from a variable characterizing fuel outgassing with the aid of a model which maps a vapor pressure curve of the fuel.

9. An electronic control unit which is configured for ascertaining a charging of a store for hydrocarbons originating from a fuel tank a of a vehicle, the control unit designed to:

determine the charging of the store from a variable characterizing fuel outgassing with the aid of a model which maps a vapor pressure curve of the fuel.