Abstract: A heat exchanger arrangement is provided for an internal-combustion engine having a heat engine, which converts hot steam of a working medium by way of an expansion device to kinetic energy. The working medium, that can be delivered by a pump, can be heated in a first heat exchanger by a coolant and in a second heat exchanger by an exhaust gas of the internal-combustion engine. In the delivery direction, the working medium first flows through the first heat exchanger and, subsequently, through the second heat exchanger. The exhaust gas can flow through the first heat exchanger.

Abstract: A motor vehicle has a side door opening that can be closed off by way of a front side door. For opening the front side door from the vehicle interior, the front side door has an actuator on the side facing the vehicle interior for the opening of the front side door. In addition, a second actuator is arranged in the vehicle interior rearwardly of the first actuator, by which second actuator the closed front side door can also be opened. This provides a motor vehicle that permits comfortable entering and exiting of all vehicle occupants.

Abstract: A motor vehicle has a side door opening that can be closed off by way of a front side door. For opening the front side door from the vehicle interior, the front side door has an actuator on the side facing the vehicle interior for the opening of the front side door. In addition, a second actuator is arranged in the vehicle interior rearwardly of the first actuator, by which second actuator the closed front side door can also be opened. This provides a motor vehicle that permits comfortable entering and exiting of all vehicle occupants.

Abstract: A hybrid vehicle includes an internal-combustion engine drive coupleable with a transmission by way of a first coupling device, and an electric machine. A transmission is drivable exclusively by the internal-combustion engine drive, or simultaneously by the internal-combustion engine drive and by the electric machine, or when the first coupling device is open, exclusively by the electric machine. The internal-combustion engine drive has a first internal-combustion engine unit, which can be coupled with the transmission by way of the first coupling device, and a second internal-combustion engine unit, which can be coupled with the first internal-combustion engine unit by way of a second coupling device.

Abstract: A heat exchanger arrangement is provided for an internal-combustion engine having a heat engine, which converts hot steam of a working medium by way of an expansion device to kinetic energy. The working medium, that can be delivered by a pump, can be heated in a first heat exchanger by a coolant and in a second heat exchanger by an exhaust gas of the internal-combustion engine. In the delivery direction, the working medium first flows through the first heat exchanger and, subsequently, through the second heat exchanger. The exhaust gas can flow through the first heat exchanger. A very high efficiency can be achieved for the internal-combustion engine with the above-described heat engine.

Abstract: A thermodynamic engine converts the superheated steam of at least one working medium into kinetic energy using a decompression device. Said engine includes a low-temperature circuit, in which a first working medium is transported through a first heat exchanger and subsequently through the decompression device and a high-temperature circuit, in which a second working medium is transported through a second heat exchanger and subsequently through the decompression device. The first heat exchanger and the second heat exchanger are located in the exhaust system of an internal combustion engine, and the internal combustion engine a coolant circuit can be used to heat the working mediums in separate collection containers.

Abstract: A device for electroacoustic sound generation in a motor vehicle with a sound pressure sensor, a signal processing unit, which is connected with the sound pressure sensor and receives and processes signals therefrom, and a loudspeaker unit with at least one loudspeaker connected with the signal processing unit. The sound pressure sensor is arranged in the area of the intake tract or exhaust gas tract of the motor vehicle. To ensure a sound generation that is as variable as possible and nevertheless authentic, a synthesizer that is connected with, or integrated in, the signal processing unit is used so that synthetic sound components can be added to the signals generated from the sound pressure sensor.

Abstract: An apparatus for producing sounds corresponding to the operation of an internal combustion engine in the interior space of a motor vehicle is characterized by a pressure sensor (20) that detects fluctuations in pressure in a fresh air stream into the engine, an amplification device (32, 33) for amplifying output signals of the pressure sensor, and at least one speaker (34) attached to the amplifier and arranged in the interior space of the vehicle for reproducing the amplified signals.

Abstract: A thermodynamic engine converts the superheated steam of at least one working medium into kinetic energy using a decompression device. Said engine includes a low-temperature circuit, in which a first working medium is transported through a first heat exchanger and subsequently through the decompression device and a high-temperature circuit, in which a second working medium is transported through a second heat exchanger and subsequently through the decompression device. The first heat exchanger and the second heat exchanger are located in the exhaust system of an internal combustion engine, and the internal combustion engine a coolant circuit can be used to heat the working mediums in separate collection containers.

Abstract: The invention relates to a method for the operation of a steam thermal engine, whereby the hot steam from a working medium is converted into kinetic energy, by means of a pressure-releasing device (1). The working medium is heated in a boiler (6) to a low temperature, preferably boiling point at a low pressure, steam is taken from the boiler (6) to a pressure chamber (7, 8), in which the steam is heated to a higher temperature. Liquid working medium (or condensate) is injected from the boiler (6) into the pressure chamber (7, 8) whereupon the working medium is instantaneously evaporated, such that the pressure in the pressure chamber (7, 8) rises markedly and the steam is fed from the pressure chamber (7, 8) to the pressure-releasing device (1).

Abstract: The invention relates to a method for the operation of a steam thermal engine, whereby the hot steam from a working medium is converted into kinetic energy, by means of a pressure-releasing device (1). The working medium is heated in a boiler (6) to a low temperature, preferably boiling point at a low pressure, steam is taken from the boiler (6) to a pressure chamber (7, 8), in which the steam is heated to a higher temperature. Liquid working medium (or condensate) is injected from the boiler (6) into the pressure chamber (7, 8) whereupon the working medium is instantaneously evaporated, such that the pressure in the pressure chamber (7, 8) rises markedly and the steam is fed from the pressure chamber (7, 8) to the pressure-releasing device (1).

Abstract: A process is disclosed for determining the vibration characteristics of a body by modal analysis. The body is made to vibrate at different frequencies and optical interference images of the body are recorded for the different frequencies. The interference images are analyzed on the basis of a mathematical/physical model, in view of the vibration characteristics at predetermined points, and the thus obtained information about the vibration characteristics of said points is subjected to a modal analysis.

Abstract: An improved vibration absorber that overcomes deficiencies of known heavy vibration absorbers that require exact manufacturing tolerance for the rigidity of the absorber in order to generate a sufficiently large frequency range of the vibration absorber. The new vibration absorber has the purpose of covering a larger frequency range with a lower weight by having the absorber mass disposed to be pivotable around a pivot at one end and on an opposite side supports itself on the vehicle body through at least one bearing arrangement. The absorber mass and/or the bearing arrangement are slideably arranged with respect to the pivot. The vibration absorber may be used in vehicles which have a natural vibration in the low frequency range.

Abstract: PID characteristics of a closed-loop type controller compensation network for a hydraulic pulsing machine coupled with a test specimen are adjusted by determining the closed-loop stability locus of the network and adjusting PID characteristics until the stability locus is located at a desired position.