Robert Boschgmbh

Bobert Bosch Gmbh

Hans Veil

Klaus-Dieter Leimbach

Lutz Reuschenbach

Matthias Horn

Werner Stumpe

Roland Karrelmeyer

Stefan Hummel

Eberhard Schnaibel

Christian Koehler

Rolf-Hermann Mergenthaler

Axel Stuber

Eduard Weiss

A mass value is determined which represents the mass of a vehicle. The vehicle includes a drive unit and a clutch unit. By the disengagement of the clutch unit, the force flow between the drive unit and the vehicle wheels can be essentially interrupted. At least a first acceleration value is detected which represents the vehicle acceleration at a first time point. Furthermore, at least a first drive value is detected which represents the drive force or the drive torque of the drive unit at the first time point. At least a second acceleration value is detected which represents the vehicle acceleration at a second time point whereat the clutch unit is disengaged. A comparison then takes place of the detected second acceleration value with at least one pregivable threshold value. The determination of the mass value takes place at least in dependence upon the comparison and at least in dependence upon the detected first acceleration value and the detected first drive value.

Process and device for determining a vehicle's mass

A method and a system for ascertaining a mass value representing the vehicle mass of a motor vehicle, particularly of a commercial vehicle, having a drive unit. An acquisition at least of a first and a second acceleration value is provided for this determination. These acceleration values represent the vehicle acceleration at a first and a second point of time. Further, at least one first and one second drive value are acquired. These drive values represent the drive force or the drive torque of the drive unit at the first and the second point of time. At least as a function of the acquired acceleration values and the acquired drive values, at least a first and a second driving-resistance value are then determined. The mass value is ascertained at least as a function of a comparison of the determined first driving-resistance or mass estimated value to the determined second driving-resistance or mass estimated value. A roadway slope is detected using the comparison, whereby an erroneous mass determination caused by the roadway slope is avoided.

Method and system for determining a vehicle mass

A method and an apparatus for controlling the brake system of a vehicle consisting of at least two component vehicles is described, where the brake system of the second component vehicle is controlled from the first component vehicle. The first time the brake pedal is actuated or the first time the brake pedal is released after the braking force has been built up, actuation pulses for the brake system of the second component vehicle are formed, which are derived from the application point of the brakes of the second component vehicle.

Method and apparatus for controlling the brake system of a vehicle

A vehicular mass is determined, or a signal indicative thereof is generated, in particular for a commercial vehicle having a towing vehicle and a trailer/semitrailer. The vehicle has actuatable braking devices, which act, in particular, on the wheels of the towing vehicle and/or on the wheels of the trailer/semitrailer. At least one first acceleration value representing the vehicle's acceleration before the braking device is actuated, and at least one second acceleration value representing the vehicle's acceleration after the braking device is actuated, are measured. The vehicular mass or the signal indicative of the vehicular mass are determined and produced, respectively, as a function of the first and second measured acceleration values.

Method and device for determining vehicular mass

A method and a device for controlling the braking system of a vehicle that includes at least two subvehicles. In this context, at least one of these subvehicles is provided with an electrically controllable braking system. A correcting quantity is determined from operating variables of the first subvehicle for influencing the longitudinal forces between the vehicle sections during a braking process. The correcting quantity is determined repeatedly during a braking process, the determination of the correcting quantity being effected more quickly at the beginning of a braking than in the course of the braking process. Furthermore, the correcting quantity is determined in such a way that the ratio of braking force to normal force in both subvehicles is essentially adjusted to the same value.

Method and device for controlling the braking system of a vehicle

A method and an apparatus for controlling the brake system of a vehicle consisting of at least two component vehicles are proposed, where at least one of these component vehicles is equipped with an electrically controlled brake system. As a function of the actuation of the brake pedal, nominal values for the control of the wheel brakes are formed. An actuating variable for controlling the wheel brakes of the second component vehicle is formed in this first component vehicle. During a braking operation of the complete vehicle, the actuating variable for one component vehicle is modified by a value which, in the event that the brakes of the first component vehicle are not engaged, is determined by adjustment of the actuating variable for the second component vehicle or by adjustment of the nominal values for the wheel brake of the first component vehicle.

Method and apparatus for controlling the brake system of a motor vehicle

Fuel dosage control process for internal combustion engines

A method and apparatus for controlling the braking system of a vehicle having at least two subvehicles. For at least one subvehicle, an electrically controlled braking system is provided, where the driver's braking inputs and control variables resulting in application and/or release of the wheel brakes are taken into account. The corresponding application or release control variables for the second subvehicle are ascertained from the equilibrium of forces of the overall vehicle.

Method and apparatus for controlling the braking system of a vehicle

Method for calculating the air charge for an internal combustion engine

A control system is described for metering the fuel in an internal combustion engine. On the basis of the operating state of the internal combustion engine and a mixture correction signal for correcting the deviation of the air/fuel ratio from a desired value, a basic injection quantity signal is generated. A transition compensation signal is also generated while taking into account an adaptive correction factor. The adaptive correction factor is generated by comparing the mixture correction signal with a reference. The transition compensation signal is logically combined with the basic injection quantity signal to form a signal indicative of the quantity of fuel to be injected. In a second exemplary embodiment, the adaptive correction factor is determined by comparing the output signal of an exhaust gas sensor with a reference. In a third exemplary embodiment, both the mixture correction signal and the output signal of the exhaust gas sensor are included in the determination of the transition compensation signal.

Control system and method for metering the fuel in an internal

In a method and a device for predicting a future load signal (tLPr) in connection with the control of an internal-combustion engine, a crank-angle interval (wPr) is determined from the storage of fuel before use (wEE), from the fuel-injection period (wti), and from the calculation time (wB), expressed in units of time or crank-angle units. The future load signal (tLPr) is then determined from a current main-load signal (tL), a current auxiliary-load signal (tL'), which runs ahead of the current main-load signal (tL), and from the crank-angle interval (wPr). The determination is made using a first-order low-pass filter, whose filter constant (wF) is able to be specified in dependence upon load.

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Eberdingen, Germany

Hans Veil