Robert Boschgmbh

Claus Ruppmann

Cornelius Peter

Dieter Gunther

Richard Bertsch

Ernst Wild

Peter Werner

Helmut Maurer

Hartmut G Brammer

Gunther Plapp

Michael Horbelt

Hans Schnurle

Alfred Kratt

Erhard Renninger

Otto Glockler

Harald Kalippke

Martin Zechnall

Bernd Kraus

Albrecht Clement

Rainer Schillinger

Richard Gerber

Jorg Issler

Gerold Grimm

Ulrich Mayer

Erwin Nagele

Gunter Brand

Eberhard Biermann

Dieter Mayer

Harald Sailer

Hans-Ulrich Gruber

Dieter Walz

Wolfgang Lolhoffel

Jurgen Penschuck

Helmut Breitkreuz

Device for controlling at least one throttle cross-section at a control

An apparatus is disclosed for venting a fuel tank of internal combustion engines or the like, wherein fuel vapors developing in the tank are received in an intermediate storage unit containing an activated carbon filter and are delivered to the induction area of the engine in dependence upon operating conditions. The delivery is accomplished by an electrically controlled tank venting valve having a pass-through opening the cross section of which is continuously changed. This is achieved by changing the pulse duty factor of the drive pulse train for this valve. The pulse duty factor may be determined in the sense of a pure control using a family of characteristic fields in dependence on rotational speed and load of the engine, or by taking into account preferably averaged Lambda values with a reduction in the cross section of the pass-through opening of the tank vent valve as the mixture becomes richer. Further, an adaptive anticipatory control is provided which enters into the calculation of the fuel quantity to be supplied or of the fuel injection signal with a correction value (ATE) and switches over to a limit control when predetermined mixture proportions are reached. The basic adaptation in the Lambda control system for calculating the fuel supply is released only if the fuel quantities originating from tank venting are negligible.

Apparatus for venting a fuel tank

The invention is directed to a method and an apparatus for adapting the characteristic of a final controlling element to eliminate disturbances and other undesired influencing quantities and, particularly for adapting the controller characteristic for the idle air charge control of internal combustion engines. A desired air quantity value issued by a regulator on the basis of various operating conditions is corrected by multiplicative and/or additive action prior to being delivered to an idle control element, for example, by means of which a change is effected in the cross-sectional area of the opening of a bypass valve arranged in the fuel metering arrangement of the internal combustion engine. This correction relates to adapting a characteristic of the idle control element with respect to offset and slope. This is accomplished by evaluating the output signals of at least one offset integrator or one slope integrator to generate an adapted electrical actuating quantity for the idle control element. The integrators are released in dependence on operating conditions and receive an input differential signal obtained from the signal indicative of the desired air quantity value from the regulator and a signal indicative of the actual air quantity.

Method and apparatus for adapting the characteristic of a final

A flow rate meter which serves to ascertain the mass of a flowing medium, in particular the flow rate of the air aspirated by an internal combustion engine via its air intake tube. The flow rate meter includes a measuring device that is pivotable about a bearing shaft in a flow conduit, in order to reduce the measurement error at maximum flow rate of the medium, a connecting conduit discharges downstream of the measuring device and its opening remote from the flow conduit leads into the damping chamber.

Flow rate meter with pressure equalizer conduit

A pressure regulating device is proposed, which serves to regulate the fuel pressure in a fuel injection system for internal combustion engines. The pressure regulating device includes a pressure regulating valve which has a valve diaphragm fastened in a valve housing and defining a fuel chamber which communicates via an inflow opening with a fuel distributor line. Protruding into the fuel chamber is a valve seat body joined to the valve housing, on one end of which body a valve seat is formed and the other end of which is embodied as an outlet pipe that passes through the wall of the fuel distributor line. The fuel distributor line is formed of two shell halves inserted one inside the other, of which the first shell half has a tub-shaped end into which the pressure regulating valve is inserted and with which it is securely fastened.

Pressure regulating device

A method and a device for an adaptive forward feeding of a disturbance correcting signal in a regulator is based on storing an output signal from the regulator at a first time point t.sub.0 corresponding to the occurrence of a disturbance. At a later time point t.sub.1 when the disturbance has been settled by the regulator, a second output signal from the regulator indicative of the final integration level is compared with a stored signal and the difference signal is processed and combined with a constant disturbance correcting signal, thus producing another an adapted disturbance correcting signal which minimizes the deviation from a desired magnitude and at the input of the regulator. The processing of the adaptive correction signal at the output of the comparator is preferably made by an integration according to a preset formula of a plurality of differences produced from a plurality of forward switching actions before the second time point t.sub.1. The averaged adaptive correction signal is then applied at the time point t.sub.1 to a summing device where it is added to the constant disturbance correcting signal.

Method of and device for adaptive feeding forward a disturbance variable

A method and an apparatus for controlling at least one throttle cross section in a control line, in particular in a line carrying operating medium for an internal combustion engine, such as an air bypass around the throttle valve of the engine. The apparatus includes an electric control motor, by means of which a throttle device having a circular-segmental control section can be rotated. The control section is rotatable in a control opening intersecting the control line, and the control line and control opening are connected with one another by a throttle opening which has limiting faces. When the control motor is not excited or if the control motor should fail, the control section is rotated by a spring element against a stop, into a position in which a control edge together with the limiting face opens a first throttle cross section, which is sufficiently large to supply the engine with a sufficient quantity of air for the prevailing situation.

Method and apparatus for controlling at least one throttle cross section

A fuel metering system having a .lambda. regulation device in which the delay periods known per se from the prior art are variable upon the switchover of the integration direction of an integrator included in the .lambda. regulation system. This variation produces a shortening of the delay period, as a result of which it is possible to prevent an excessive enrichment of the mixture. The invention relates to a controllable reduction of the individual delay signal as well as a control of the total duration of control exerted on the delay signals as they appear. The invention is independent of whether it is realized by either analog or digital circuit technology.

Fuel metering system for an internal combustion engine

Growing community of inventors

Stuttgart, Germany

Claus Ruppmann