Infineon Introduces Two New XENSIV™ Air Pressure Sensors for Engine Management and Pneumatic Seating Systems
Infineon Technologies AG introduces two new XENSIV?Barometric Pressure (BAP) sensors for automotive applications: the KP464 and the KP466. The KP464 is primarily designed for engine control management, while the KP466 BAP sensor is mainly used for seat comfort functions.
KP464 Helps Improve Fuel Efficiency and Reduce Power Consumption
The KP464 BAP sensor is capable of measuring atmospheric pressure, which is dependent on altitude and weather conditions. The engine management system can use the sensor's measurements to calculate air density and ensure an optimal air-fuel ratio. This is a key feature for improving fuel efficiency and reducing power consumption. Along with reduced energy losses, emissions of CO2 and other pollutants are minimized. Infineon's KP464 BAP sensor combines density measurement with diagnostic functions such as manifold air pressure monitoring. Lower power consumption and miniaturization of the package increase the productivity of the device.
KP466 helps improve comfort and bring more technical advantages
Infineon's new generation of KP466 BAP sensors enables seat manufacturers to realize innovative pneumatic seating systems with numerous additional features. These functions not only improve comfort, but also offer significant technical advantages. For example, the multi-contour seat function enables occupants to adjust the seat contour to their individual needs; the air unit integrated in the lumbar support and seat cushion allows the seat to adapt to the body contour; the massage function further enhances occupant comfort on long trips by alternately inflating and deflating the air unit; and the driving dynamics function automatically adjusts the seat's lateral support according to the current driving conditions, providing the occupant with optimal comfort in various situations, including cornering. The Driving Dynamics function automatically adjusts the seat's lateral support according to the current driving conditions, providing the occupants with optimum stability in all situations, including corners.
This optimized solution significantly reduces power consumption and features a miniaturized five-hole housing. The system constantly monitors the pressure status and adjusts the seat cushion pressure to the current requirements. For this purpose, the system uses several absolute pressure sensors to monitor the pressure throughout the system. The Infineon sensor also supports SPI for efficient system communication.
Technical characteristics of the KP464 and KP466 sensors
The KP464 and KP466 sensors are both high-performance, high-precision, miniaturized digital absolute pressure sensors based on the capacitive measuring principle. Both sensors meet the AEC-Q103-002 standard and are able to fulfill the requirements of the automotive industry. As a result, these devices reduce the workload and risk of error in module and system certification. Their surfaces are micromachined and feature monolithically integrated signal conditioning circuitry. Both devices convert the physical pressure into a 10-, 12- or 14-bit digital value and transmit the information via an SPI interface.
In addition, both sensors can be integrated into a daisy chain, which minimizes the number of connecting pins of the communicating microcontroller and supports the adoption of any number of pressure sensors. And they can also be used in combination with other Infineon system components.
Not only that, but a temperature sensor is also integrated on the chip. 10-, 12- or 14-bit temperature information will also be transmitted via the SPI interface in accordance with the SPI commands received. Both sensors have a special power-saving mode that enables users to further reduce the power consumption of the sensors. In addition, a diagnostic function for testing the sensor unit and the signal path is integrated, increasing the reliability of the devices. The diagnostics are done automatically when the sensor starts and wakes up, or can be triggered directly via SPI commands.
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