Pierburg Gmbh

Pierburg Gmbh & Co Kg

Bosch & Pierburg System Ohg

Dieter Thonnessen

Valerio Bianchi

Gunter Hartel

Armin Schurfeld

Hans-Ulrich Kühnel

Dieter Jelinek

Wolfgang Jordan

Anwar Abidin

Ulrich Remde

Peter Heuer

Karl-Henrich Losing

A heat transmission unit includes a channel conducting a coolant, and a channel conducting a fluid to be cooled. The two channels are separated from each other by a wall provided with ribs extending therefrom into at least one of the two channels. The channel conducting the fluid to be cooled includes a fluid inlet and a fluid outlet. The channel is separated by a partition wall, arranged in flow direction, into a first and a second partial channel having a first partial inlet for fluid and a second partial inlet for fluid, and a first partial outlet for fluid and a second partial outlet for fluid. At least the first partial inlet for fluid is adapted to be shut off by a first shut-off device.

Heat transmission unit

A process and apparatus for utilization of fuels with alcohol additives for an internal combustion engine which are characterized by the fact that at the present time comercial types of fuel have approximately the same molecular weights, which are clearly distinct from the molecular weights of methanol and ethanol. By complete vaporization of a sample volume of fuel, depending on the admixture of alcohol to standard fuel, different volumes of vaporized fuel samples are produced, or different pressures are obtained if the volume is constant. Based thereon and on the sample temperature a correction signal is formed which is characterized by the alcohol and its content in the sample (as compared with reference values stored in a control device), and the correction signal can be utilized to regulate the engine control variables.

Process and apparatus for utilization of fuels with alcohol additives

An electromagnetic injection valve in which the spring acting between an iron core and a valve closure member is made of spring steel. The iron core is formed as a round rod which is reduced in diameter at the end thereof forming a stop surface for the valve closure member. A protruding support ring of nonmagnetic material is fixed to the valve closure member for the guidance of the spring, such that the turns of the spring are spaced from the surfaces of the reduced diameter end of the rod and the valve closure member in the region of the air gap between the rod and valve closure member by at least an amount equal to the reduction in diameter of the end of the rod.

Electromagnetic injection valve for internal combustion engines

An electrmagnetic intermittent injection valve for supplying fuel to an intake duct of an internal combustion engine comprising a hollow body having a fuel inlet for admission of fuel from a fuel supply, a fuel outlet for supply of fuel to an intake duct of an internal combustion engine, and a fuel return for returning fuel back to the fuel supply. A ball valve is movable in the body between a first position in which the fuel outlet is closed and a second position in which the fuel outlet is open. A spring acts on the ball to urge the ball to the first position. A soft iron core is disposed in the body in facing relation with the ball, the body including a housing end portion of soft iron facing the ball valve. A coil in the body serves for energizing the core and the housing end portion for producing a magnetic field having lines of flux acting on the ball valve to urge the ball valve to the second position against the resilient opposition of the spring. The core and housing end portion are arranged in relation to the ball valve such that the lines of flux produced by the housing end portion form an angle therebetween less than 90.degree..

Electro-magnetic injection valve having enhanced valve-opening forces

A constant pressure carburettor comprises a mixing chamber 2 which is surrounded by a heating jacket 12, an operator controlled throttle valve 3 at the downstream end of the chamber 2, a fuel feeder 5, 6 at the upstream end of the mixing chamber and a choke valve 10 at an air inlet to the carburettor. The choke valve 10 is, in use, controlled automatically by the air flow into the carburettor in dependence on the opening of the throttle valve 3 and the speed of the engine to which the carburettor is fitted. The choke valve 10 tends to produce vortices or turbulence in the air flow and this tends to cause the fuel supplied by the feeder 5, 6 to the wall of the chamber 2 to be prematurely removed before it is heated. This adversely affects the vaporization of the fuel and the formation of the air-fuel mixture. To avoid turbulence or vortices in the chamber 2, a stabilization conduit 16 is provided between the choke valve 10 and the fuel feeder 5, 6. The conduit 16, which preferably has two right-angle bends as shown, damps out or at least decreases the vortices or turbulence in the air flow before it reaches the mixing chamber 2.

Growing community of inventors

Viersen, Germany

Dieter Thonnessen