Robert Boschgmbh

Peter Horstmann

Peter Satzger

Tilman Miehle

Stephan Leuthner

Stefan Keller

Jochen Wessner

Juergen Hammer

Ulrich Alkemade

Petra Kanters

Stefanie Wahl

Gernot Mall

Martin Reif

Maxime Carre

Martin Hering

Tania Gonzalez-Baquet

Thomas Danne

Rene Meise

Daniel Jansen

A method for operating a fuel injection system of a motor vehicle in particular is described. The fuel injection system has a fuel accumulator, capable of receiving fuel via a metering unit. In the method, an actual pressure in the fuel accumulator is affected by an I regulator, among other things. A precontrol value is generated by a precontrol characteristic map, which is used for compensating manufacturing-related differences in the components of the fuel injection system.

Method for operating a fuel injection system of a motor vehicle in particular

The invention relates to an expansion device for a refrigerant, in particular an expansion device to control the high-pressure level of an air conditioner. In accordance with the invention, it is provided that the expansion device () is a sliding seat valve (). In addition, the invention relates to an air conditioner (), in particular an air conditioner () for a motor vehicle, with a compressor (), a condenser or gas cooler (), an expansion device () as well as an evaporator (). In accordance with the invention, it is proposed that the expansion device () is formed by at least one sliding seat valve ().

Expansion device for an air conditioning system

The invention relates to an air-conditioning unit () for a motor vehicle with a heating heat transfer unit () connected to a coolant circuit () in an internal combustion engine and comprising an evaporator () installed upstream in the direction of flow of a fan (). A compressor () in a refrigerant circuit () pumps a refrigerant through a gas cooler () and an expansion valve () during a cooling operation, and pumps said refrigerant to the evaporator () via the expansion valve () by by-passing the gas cooler () during a heating operation. A coupled heat exchanger () is provided between the coolant circuit () and the refrigerant circuit (). The invention provides that the coupled heat exchanger () is located in the refrigerant circuit () on the pressure side of the compressor () upstream of the gas cooler (), a first by-pass line () is provided parallel to the gas cooler () and the flow through the gas cooler () and the first by-pass line () is controlled by a switching valve () in the first by-pass line () and a switching valve () located at each of the inlet and outlet of the gas cooler (), depending on operating parameters, and a heat transfer unit () for a medium in a unit in the refrigerant circuit () is connected behind an expansion valve (or) and serves as heat source in heating operation.

Air-conditioning unit with additional heat transfer unit in the refrigerant circuit

A method for calibrating a pressure sensor in a fuel metering system and a corresponding device, which enable the pressure sensor to be calibrated as precisely as possible. For this purpose, the instantaneous cooling-water temperature of the internal combustion engine is measured and the drop in the cooling-water temperature is derived therefrom as a measure for the standstill time of the internal combustion engine, the pressure sensor first being calibrated when the standstill time exceeds a predefinable minimum. Thus, an arrangement for monitoring the cooling-water temperature already present per se in the vehicle may be used to reliably and precisely calibrate the pressure sensor. Therefore, this is able to be realized very quickly and almost without extra expenses, in particular without using an additional timing supervision for measuring the standstill time. The method and the corresponding device are well suited for calibrating pressure sensors in the high-pressure region (rail pressure sensors) as well as for calibrating sensors in the low-pressure region (presupply pressure sensors).

Method and device for calibrating a pressure sensor in a fuel metering system

The apparatus ( ) for treating exhaust gas from an internal combustion engine includes a storing catalyzer for absorbing NO during lean operating conditions and a device for burning fuel ( ) in an exhaust gas stream ( ) to produce a reducing atmosphere in the exhaust gas for storing catalyst regeneration and an aerodynamic control device for controlling the burning of the fuel in the exhaust gas stream, so that combustion is clearly improved when the engine is operated under lean operating conditions and no carbon is formed.

Method and apparatus for processing exhaust gas from an internal combustion engine

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Leonberg, Germany

Peter Horstmann