Patents by Inventor Rainer Mittag
Rainer Mittag has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 6218814Abstract: A device for voltage regulation for a generator driven by an internal combustion engine is described in which the voltage regulator is equipped with a load response travel function (LRF), which prevents a rapid rise in the exciting current when a powerful electric consumer is turned on. By means of a suitable trigger circuit which evaluates the engine rpm and thus the generator rpm, the load response travel function is blocked during travel when rpm values are falling, so that in this case, the voltage incursions that occur during an active load-response function are maximally averted.Type: GrantFiled: March 18, 1999Date of Patent: April 17, 2001Assignee: Robert Bosch GmbHInventors: Walter Kohl, Rainer Mittag, Guenter Nasswetter, Helmut Suelzle
-
Patent number: 5602470Abstract: In a circuit arrangement for measuring a starting of rotation of a generator having an exciting winding and three-phase windings, a voltage regulator regulates an output voltage of the generator by influencing an exciting current, the three-phase windings are connected to one another at a point, one of the phase windings is connected to ground via a first resistor, another of the phase windings is connected to ground via a second resistor, a voltage across the first resistor is evaluated as a rotational-speed-dependent alternating voltage, this voltage is compared with a threshold voltage, and the starting of the rotation of the generator is detected when the measured voltage exceeds the threshold voltage.Type: GrantFiled: April 10, 1995Date of Patent: February 11, 1997Assignee: Robert Bosch GmbHInventors: Walter Kohl, Rainer Mittag, Matthias Hoeber
-
Patent number: 5594321Abstract: The battery charging apparatus includes a generator, main voltage regulator, an auxiliary voltage regulator, at least one consuming device and a protective circuit having circuit portions for recognizing and signalling faults via a charge control lamp. The generator output voltage is rectified with rectifier bridges containing Zener diodes. Voltage comparison to threshold values and logic circuitry for processing the comparison results are used to determine the presence of faults in the operation of the battery charging apparatus. The fault detection device detects conduction defects in the main voltage regulator and/or interruption in the generator excitation circuit. The logic circuitry determines whether simultaneously both a supplied voltage exceeds a threshold value and the main voltage regulator is turned on longer than a predetermined time interval to indicate its continuous operation.Type: GrantFiled: July 11, 1994Date of Patent: January 14, 1997Assignee: Robert Bosch GmbHInventors: Walter Kohl, Rainer Mittag, Matthias Hoeber
-
Patent number: 5548202Abstract: In a device and a method for regulating an alternator increased alternator output is achieved either in that the exciter current can have a value above the nominal exciter current or in that the alternator control parameters are fixed in such a way that overheating could occur under unfavorable circumstances. In order to prevent this overheating even under unfavorable circumstances, the temperature is measured preferably in the regulator and the temperature at critical locations is determined from this temperature while taking into account typical parameters. This can be effected in that the temperature or temperatures which would occur in stationary operation are first determined. When an impermissible temperature is detected, the exciter current is reduced by suitable steps until the allowable maximum temperature is not exceeded.Type: GrantFiled: August 18, 1993Date of Patent: August 20, 1996Assignee: Robert Bosch GmbHInventors: Gunter Schramm, Walter Kohl, Friedhelm Meyer, Rainer Mittag, Helmut Suelzle
-
Patent number: 5523672Abstract: The description concerns a voltage regulator (12) for regulating the output voltage (UB+) of an alternator (10) which is driven by an internal combustion engine. The voltage regulator (12) has an additional circuit (24) which evaluates the exciter current duty cycle (T) and supplies a signal (S1) at its output which is high when the exciter current duty cycle is high and low when the exciter current duty cycle is low. The circuit (24) is integrated in the voltage regulator (12) and the output signal (S1) supplied by it is transmitted via an additional regulator terminal (DA) and can be fed to the control device (25) of the internal combustion engine, where it is used, for instance, to increase the idling speed of the engine and accordingly also to increase the alternator speed and thus the power delivered by the alternator (10). It is also possible to switch off unnecessary consumers with this signal.Type: GrantFiled: December 8, 1994Date of Patent: June 4, 1996Assignee: Robert Bosch GmbHInventors: Guenter Schramm, Walter Kohl, Friedhelm Meyer, Rainer Mittag
-
Patent number: 5374886Abstract: In a voltage regulator for an alternator which charges a battery via a charging cable and supplies a vehicle mains with voltage, the output voltage is regulated as a function of the temperature of the battery. The voltage regulator has a power part and a control part, which includes a simulation device for storing data and for determining the temperature of the battery, and hence the optimum charging voltage, by simulation from the stored data. Further, the voltage drop between the alternator and battery can be calculated from the alternator current and the resistance of the charging cable while taking into account correction factors which take into account the different connections of the consuming devices between the alternator and the battery so that the calculated voltage drop and the optimum charging voltage for the battery can be used by the voltage regulator to set the voltage delivered to the battery.Type: GrantFiled: July 10, 1992Date of Patent: December 20, 1994Assignee: Robert Bosch GmbHInventors: Walter Kohl, Friedhelm Meyer, Rainer Mittag
-
Patent number: 5352929Abstract: The apparatus for controlling an output voltage of a generator of an internal combustion engine having a starter device, includes a charge control signaling device, an excitation coil for the generator and a voltage regulator controlling an excitation current in the excitation coil and an excitation current limiting device for limiting the excitation current during a predetermined starting phase (.DELTA.t1 ) connected to the voltage regulator. The excitation current limiting device detects whether the engine is in a starting phase. If the engine is in a starting phase, the excitation current limiting device reduces the excitation current so that a voltage is produce at generator terminal D+ which permits no load current and simultaneously guarantees that the charge control signalling device is shut off.Type: GrantFiled: June 25, 1993Date of Patent: October 4, 1994Assignee: Robert Bosch GmbHInventors: Walter Kohl, Friedhelm Meyer, Rainer Mittag, Helmut Suelzle
-
Patent number: 5280232Abstract: The method of regulating a voltage produced by a generator with a voltage regulator according to a battery charge state includes providing a controller containing a clock and a memory able to store battery and power supply reference data, battery voltage and generator rotation speed; maintaining a regulated voltage produced by the generator at a normal value (U.sub.R) during a first time interval (t1); measuring a battery voltage (U.sub.B) and decreasing the regulated voltage (U.sub.R) during a second time interval (t2); determining the battery charge state from the measured battery voltage (U.sub.B) according to the stored battery- and power supply-reference data; and, when the battery charge state is determined to be unsatisfactory, determining an additional time interval (t4) with the controller and an amount of increase of the regulated voltage (U.sub.Type: GrantFiled: October 21, 1991Date of Patent: January 18, 1994Assignee: Robert Bosch GmbHInventors: Walter Kohl, Rainer Mittag
-
Patent number: 5233229Abstract: A device for supplying voltage to at least one consuming device in a motor vehicle including two parallel generators, two voltage regulators associated with each of the generators, two batteries each connected with one of the voltage regulators, a starter switch connected with at least one of the batteries and the voltage regulators, a charge control lamp for signalling connected with the starter switch and the voltage regulators, switching device for electrically connecting and disconnecting the consuming device or devices, and devices for controlling the voltage regulators so that during starting the charge control lamp indicates starting and the switching device disconnects the consuming devices and if a defect occurs in either generator-voltage regulator system, the charge control light lights and the consuming device or devices is (or are) supplied with current, even if, for example, one of the generators fails.Type: GrantFiled: January 3, 1992Date of Patent: August 3, 1993Assignee: Robert Bosch GmbHInventors: Walter Kohl, Rainer Mittag, Wenzel Novak, Kai-Uwe Strasser
-
Patent number: 5198744Abstract: A generator having an exciting winding and a standard load associated with a standard exciting current in the exciting winding can be controlled by a voltage regulator which adjusts an exciting current in the exciting winding and a temperature measurement device in a predetermined location in the generator and/or a voltage regulator associated with the generator, which is connected to the voltage regulator, advantageously via a microprocessor device or a pulse duration modulation circuit connected to the final regulating stage of the voltage regulator for gating the exciting current. So that the generator can be dimensioned to operate above its maximum rated temperature and can be operated in a superexcited state, the method of controlling the generator includes the steps of increasing the exciting current in the exciting winding beyond the standard exciting current to operate the generator at a higher load than the standard load; measuring a temperature T.sub.Type: GrantFiled: June 6, 1991Date of Patent: March 30, 1993Assignee: Robert Bosch GmbHInventors: Walter Kohl, Friedhelm Meyer, Rainer Mittag, Guenter Schramm
-
Patent number: 5166594Abstract: The battery charging system includes a generator, a rectifier system with main diodes and exciter diodes as well as two terminals (B+, D-) for battery charging, at least one terminal (D+) for consuming points, a voltage regulator (14) for a generator output voltage, a charging control light (16) and a fail-safe device (15) structured to indicate faults and for protection from excess voltages. The fail-safe device includes an additional voltage regulating device (17) connected electrically to the generator and a relay (27) connected with the additional voltage regulating device.Type: GrantFiled: May 24, 1991Date of Patent: November 24, 1992Assignee: Robert Bosch GmbHInventors: Gunter Schramm, Edgar Kuhn, Rainer Mittag
-
Patent number: 5107094Abstract: An electrical heating arrangement for a motor vehicle comprises a heating resistor that is energizable directly by the power generator provided that within a network of consuming devices failure has been detected and also provided that essential elements of the network such as battery or engine temperature are within predetermined limits. Upon detection of a failure this error condition is optically indicated and the connection between the heating resistor and the generator is interrupted.Type: GrantFiled: May 21, 1990Date of Patent: April 21, 1992Assignee: Robert Bosch GmbHInventors: Edgar Kuhn, Rainer Leunig, Rainer Mittag, Guenter Schramm