By measuring the differential pressure across an orifice, the EGR flow rate can be accurately controlled and the condition of the EGR valve can be monitored; an OBD II requirement. Kavlico has designed a sensor that can monitor this pressure while at the same time providing a manifold pressure signal. These functions are uniquely combined into a single sensor using our proprietary INCAP® technology.

INCAP® is a registered trademark of Kavlico Corporation

The fuel vapor pressure in gasoline fuel tanks is often measured as a means of detecting vent system leaks as required by the OBDII legislation. The pressure range is usually from just below atmospheric to 1 psi or higher. Kavlico’s PRT or ceramic sensing technology is employed for this application and the sensor is designed and manufactured along with Kavlico’s proprietary programmable ASIC.

The sensor measures pressure differential between the inside of the fuel tank and the atmospheric pressure and can be mounted either directly to the fuel tank or in a remote location dependent upon the system configuration.

Utilizing Kavlico’s proprietary thin-film sensing technology and programmable ASIC, this sensor has been designed to isolate the sensing element from the fuel media, ensuring excellent performance over the full operating temperature range. Output is digitally trimmed to meet application specific requirements of each measurement. Pressure ranges can be specified up to 3,000 psi.

Compressed Natural Gas (CNG) is an excellent fuel for spark-ignition engines exhibiting a very high octane rating and resulting in no ozone-producing exhaust emission (Non-Methane Organic Gasses or NMOG’s). The exhaust is also lower in the greenhouse gas Carbon Dioxide (CO2) than exhaust from other fuels.

In order to successfully use CNG as a fuel, a number of pressure sensors can be effectively used. The quantity of fuel in the tank can be measured with a combined pressure and temperature sensor; the device offered by Kavlico incorporates our thin-film technology and is hermetically sealed, eliminating any possible sources for fuel leaks. Lower range pressure sensors can be used for fuel metering systems.