Bayerische Motoren Werke Aktiengesellschaft

Stefan Schott

Andreas Pelger

Klaus Szoucsek

Andreas Bruhn

Jan-Mark Kunberger

Simon Hettenkofer

Klaas Kunze

Bastian Landeck

Bjoern Hussmann

Markus Kampitsch

Marco Landwehr

Andreas Schaefer

Robert Reuter

Klaus Kolbeck

Dirk Linse

Albert Strassenberger

A method for determining an air mass in an air separator of a water direct injection system for injecting a water/fuel mixture into a combustion chamber of an engine of a motor vehicle. The air separator is disposed between a water pump for delivering water of the water/fuel mixture and a high-pressure pump for feeding the water/fuel mixture to a high-pressure injector for injecting the water/fuel mixture into the combustion chamber. The method includes increasing a pressure of the water from a first pressure value to a second pressure value by the water pump, determining a water volume delivered by the water pump during the increasing of the pressure of the water by the water pump, and determining the air mass in the air separator on a basis of the determined water volume delivered by the water pump.

Method for determining an air mass and direct water injection system

A method for operating a valve of a pressure vessel system includes determining an actual pressure difference between an inlet pressure at an inlet of the valve and an outlet pressure at an outlet of the valve, and enabling the valve if the actual pressure difference is lower than or equal to a maximum admissible pressure difference of the valve.

Method for operating a valve of a pressure vessel system, and pressure vessel system

A method for supplying at least one fuel cell of a fuel cell system of the motor vehicle with fuel includes ascertaining or predicting an indication value which is indicative of the real and/or possible mass flow of the withdrawal of fuel from a pressure-vessel system of the motor vehicle and closing at least one tank shut-off valve when the indication value is equal to or falls below a limiting value.

Method and motor vehicle for supplying at least one fuel cell with fuel

A method for adjusting temperature and/or pressure of fuel in a pressured container system of a vehicle to a respective temperature setpoint and/or a respective pressure setpoint before a process of filling the pressurized containers includes extracting fuel from a first pressurized container having a first temperature and a first pressure, to bring the first temperature and/or the first pressure of the fuel closer to the temperature setpoint and/or to the pressure setpoint of the first pressurized container. The method also includes supplying the extracted fuel to either a fuel conversion device to power the vehicle or into a second pressurized container, where fuel in the second pressurized container has a second temperature and a second pressure, to bring the second temperature and/or the second pressure of the fuel closer to the temperature setpoint and/or to the pressure setpoint of the second pressurized container. The temperature setpoints and/or the pressure setpoints are determined such that, without exceeding the respective maximum operating pressure and the respective maximum operating temperature of the respective pressurized container, the amount of fuel introduced from a single filling source by a process of filling the pressurized containers which is carried out at the same time and for the same length of time is maximized.

Method for setting the temperature and/or the pressure of fuel, in particular of hydrogen, in multiple pressure vessels of a vehicle to in each case one temperature setpoint value and/or in each case one pressure setpoint value before a filling process of the pressure vessels

A system for storing a pressurized gas in a motor vehicle is provided, having a storage container and at least one thermally activatable safety valve for emptying the storage container. The safety valve activates automatically at a corresponding high temperature. The storage container has an additional activatable emptying device, which has an interface for an external energy source. The interface can be connected to the external energy source in order to empty the storage container in a targeted manner. Also provided is a method for emptying a storage container for a pressurized gas in a motor vehicle.

System for storing a pressurized gas and method for emptying a storage container for a pressurized gas

A method for determining a filling mass in a thermally insulated container for a cryogenically stored gas includes determining the filling mass using a known container volume and a calculated density of the gas content of the container. A temperature sensor is used for measuring a mixing temperature of liquid and gaseous phases, where the liquid phase is extracted via a first extraction supply line at the geodetically lowest point, and the gaseous phase is extracted via a second extraction supply line at the geodetically highest point. Downstream of the extraction points, after a convergence of the first and the second extraction supply line, the temperature sensor is placed where a complete and thorough mixing of the liquid and the gaseous phase of the gas from the first and second extraction supply line has already taken place.

Method and device for determining the filling mass of a cryogenically stored gas in a container

A method of operating a power-assisted hydraulic steering system of a motor vehicle having a hydraulic pump mechanically driven by a vehicle drive assembly, and having an additional function which reduces the amount of power assistance at a high driving speed in comparison to the assistance at a low driving speed and, in the process, simultaneously increases the quantity of hydraulic medium circulated by way of the hydraulic assistance unit of the steering gear is provided. This additional function is activated independently of the driving speed also under operating conditions which may subject the hydraulic pump to extreme stress. For example, the additional function may be activated shortly before reaching the steering end stop, which can be detected by use of an appropriately arranged steering angle sensor. An activation also is possible if steering angles which are larger than a defined limit steering angle are set for a defined time period. Furthermore, this additional function may be activated when the temperature of the hydraulic medium and/or the pressure on the pump delivery side exceed(s) a certain limit value(s), as required, also as a function of time.

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Munich, Germany

Stefan Schott