초록 ▼

An internal combustion engine including a pressure sensing system. A first (80) and a second (82) absolute pressure sensor are located in a main sensor housing (60) mounted near an intake manifold (20). The first pressure sensor (80) measures the pressure in an EGR passage (68) between an EGR valve

An internal combustion engine including a pressure sensing system. A first (80) and a second (82) absolute pressure sensor are located in a main sensor housing (60) mounted near an intake manifold (20). The first pressure sensor (80) measures the pressure in an EGR passage (68) between an EGR valve (30) and an orifice (76), and the second pressure sensor 82 measures the pressure in the intake manifold (20) downstream of the throttle valve (46). A fuel sensor housing (54) is mounted to the fuel rail (50) and includes a third absolute pressure sensor (84) that measures the pressure in the fuel rail (50). The signals from three sensors are then used by a powertrain control module (42) to control the exhaust gas recirculation and returnless fuel systems.

대표청구항 ▼

[ I claim:] [4.] A sensor system for use in an internal combustion engine including an intake passage provided therein with a throttle valve, an exhaust passage, an exhaust gas recirculation passage connecting the exhaust passage to a first portion of the intake passage provided downstream of the th

[ I claim:] [4.] A sensor system for use in an internal combustion engine including an intake passage provided therein with a throttle valve, an exhaust passage, an exhaust gas recirculation passage connecting the exhaust passage to a first portion of the intake passage provided downstream of the throttle valve and containing an exhaust gas recirculation valve, and a fuel rail having at least one fuel injector mounted thereon, the sensor system comprising:an EGR orifice located between the exhaust gas recirculation valve and the intake passage;a sensor housing located adjacent the intake passage and including a first and a second absolute pressure sensor;an EGR pressure passage extending from a location between the EGR valve and the EGR orifice to the first absolute pressure sensor in the sensor housing;a MAP pressure passage extending from a location in the intake passage downstream of the throttle valve to the second absolute pressure sensor in the sensor housing;a fuel rail pressure housing located adjacent the fuel rail including a third absolute pressure sensor;a fuel pressure passage extending between the fuel rail and the third absolute pressure sensor; andmeans for receiving signals from the first, second and third absolute pressure sensors, calculating the difference between the signals from the first and second pressure sensors to generate a DPFE output signal, and calculating the difference between the signals from the third and second pressure sensor to generate a fuel injector pressure signal.