Lear Corporation , headquartered in Southfield, Michigan, USA, is a Fortune 500 company, engaged in the business of manufacturing and distribution of automotive seating and electrical distribution systems. As of 2014, the company had 221 manufacturing facilities in 36 countries around the globe, staffed by 113,400 employees. They recorded an aggregate global sales of US$ 16.2 billion in 2013. Lear has two major divisions: the seating business segment and the electrical business segment. Wikipedia.
Galigekere N. V.P.,Lear Corporation |
Kazimierczuk M.K.,Wright State University
IEEE Transactions on Power Electronics | Year: 2013
This paper presents the ac small-signal modeling of the power stage of pulsewidth-modulated Z-source converter in continuous conduction mode by the circuit-averaging technique. The small-signal models used to derive the open-loop power-stage input voltage-to-capacitor voltage, input voltage-to-inductor current, control-to-capacitor voltage, and control-to-inductor current transfer functions are derived. Open-loop power-stage transfer functions corresponding to the capacitor voltage loop and inductor current loop are derived. The transfer functions derived take into account the equivalent series resistances of the inductors and capacitors. Experimental validation of the derived small-signal models is presented for a laboratory prototype. The theoretical predictions are in good agreement with the experimental results. © 2012 IEEE.
Lear Corporation | Date: 2015-03-31
Polling methods and systems are described to allow a wireless device to establish communication with a base, e.g., a vehicle, in an efficient manner. The polling signal includes a plurality of time separated, polling transmission signals and a single receive time period. The polling transmission signals are separated by a non-transmission time period that is greater than a transmission time of the time separated transmission signals. The polling scheme can be repeated the polling signal until a poll response signal from the base is received. Energy savings for the wireless device are provided by limiting the number of receive actions and time periods in the wireless device.
Lear Corporation | Date: 2015-02-27
A portable wireless device includes an accelerometer to determine movement of the device to trigger a polling operation. The polling operation is to wirelessly connect the portable wireless device to a vehicle to trigger a vehicle operation. The vehicle operation can be based on the position of the portable wireless device and/or movement of the portable wireless device. The vehicle includes an apparatus for determining a location of a portable wireless device in relation to a vehicle. The vehicle operation can further be based on the wireless device location.
Lear Corporation | Date: 2015-02-05
Seats and methods for controlling a seat are described. A position of the users leg is sensed relative to the position of the front of the seat. A determination is made as to if the position of the users leg from a front of the seat is greater than a gap minimum. If the gap is greater than the gap minimum, a cushion length extender portion of the seat is moved until the sensed position is less than or equal to the gap minimum. In an example, the remainder of seat base is held in a fixed position within the vehicle environment. In an example, sensing can include capacitively sensing a position of the users leg. In an example, sensing can use at least one of a thermal sensor, a light sensor, a radio frequency sensor, a microwave sensor or combinations thereof to sense the position of the users leg. The gap minimum can be with the cushion length extender portion in slight contact with the users leg. The sensor can be at a front face of seat. The sensor can be on the cushion length extender portion of the seat.
Lear Corporation | Date: 2015-01-15
A vehicle system is provided with a portable device configured to provide a wireless signal and at least three base stations for being positioned about a vehicle. Each base station being configured to receive the wireless signal and to generate a message indicative of a time of flight of the wireless signal. The vehicle system also includes a main base station for being positioned within the vehicle and configured to determine a general location of the portable device within one of a plurality of zones about the vehicle and to determine a three-dimensional location of the portable device based on the message using a first estimation in response to the portable device being located in a first zone.