Showing papers by "Helmut Seidel published in 2005"

An injection quantity sensor for automotive applications

Abstract: For a further optimization of the internal combustion process of automobiles, a miniaturized injection quantity sensor based on the electro-thermal measurement principle was developed. It consists of a thin film metallization of titanium/platinum on a low temperature cofired ceramics (LTCC) substrate. For high-precision fuel quantity measurements, the sensor chip was integrated into a finished common rail diesel injection nozzle. The micro-flow sensor proved its high performance over the complete fuel quantity map of a high pressure hydraulic injection system up to injection pressures of 135 MPa (1350 bar). For the evaluation of the sensor signals, an injection amount indicator integrated into the hydraulic test bench was used.

Angular rate sensor for vehicle, has selection oscillator with tines that are arranged at distance and are connected with each other by base, where direct voltage is applied to excitation oscillator that is provided with electrodes

Abstract: The sensor has a selection oscillator (24) with tines (21a, 21b) that are arranged at a distance and connected with each other by a base (22). A bar (13) connects an excitation oscillator (11) with the base of the oscillator (24), and piezoelectric films (12a, 12b) are provided. The excitation (11) moves around a bar axis (15) during torsion oscillation, so that the base oscillates around the axis such that the tines are moved in a direction radial to the axis based on coriolis force. A direct voltage is applied to the oscillator (11) that is provided with electrodes.

Rotation rate sensor for determining angular speed, has torsion bar placed on base of excitation oscillator so that it is connected to substrate via fixture

Abstract: The sensor includes a tuning-fork shaped excitation oscillator with two prongs (11a,11b) connected to each other via a common base (12). A torsion transmission device (23,25a,25b) comprises a torsion bar (23) placed on the base (12) of the excitation oscillator so that the torsion bar is connected to a substrate (1) via a fixture (4). Transmission elements (25a,25b) are arranged adjacent to the torsion bar, on opposite sides, and are also placed against the base of the excitation oscillator.

Rotary rate sensor for determining angular speed of article, has excitation oscillator with two prongs connected to base by bridge, which is arranged to displace excitation unit and prongs in lateral oscillation

Abstract: The sensor has an excitation oscillator (30) with two prongs (11a, 11b), which are connected with one another by a base (12). A bar (21) connects the base with a substrate (1). An excitation unit (14) excites the prongs in opposed lateral oscillation. The prongs move based on Coriolis force perpendicular to direction of lateral oscillation, by swiveling the sensor around an axis perpendicular to the axis of the bar. The prongs are connected to the base by a bridge (13), which is arranged to displace the excitation unit and the prongs in the lateral oscillation.

Method for coating electrically insulating surfaces by CVD or PVD e.g. for materials research, involves forming micro-heating elements on ceramic substrate

Abstract: A method for coating electrically insulating substrates by CVD or PVD, in which before the CVD- or PVD-coating process, micro-heating elements (2) are formed on a ceramic substrate (1) via/over which during the CVD- or PVD-coating process energy is released on the surface of the substrate to be coated Independent claims are included for the following (1) (A) A substrate coated by CVD or PVD and (2) (B) Application of substrates coated by CVD or PVD as micro-sensors or micro-actuators