초록 ▼

A system and method for controlling an internal combustion engine to reduce or eliminate formation of EGR condensate monitor current ambient and operating conditions to determine whether conditions are favorable for condensation of EGR gases, and control the engine accordingly to avoid condensation,

A system and method for controlling an internal combustion engine to reduce or eliminate formation of EGR condensate monitor current ambient and operating conditions to determine whether conditions are favorable for condensation of EGR gases, and control the engine accordingly to avoid condensation, preferably by increasing the intake manifold temperature. The intake manifold temperature may be increased by redirecting some or all of the EGR flow to avoid the EGR cooler. Alternatively, or in combination, some or all of the charge air may be redirected to bypass the charge air cooler and/or redirected from the outlet of the turbocharger compressor to the intake, effectively increasing the intake air temperature and resulting in a corresponding increase of the intake manifold temperature. Conditions favorable for condensation may be determined based on engine speed and load, ambient temperature, manifold pressure, scheduled or actual EGR flow rate and scheduled or actual air/fuel ratio.

대표청구항 ▼

A system and method for controlling an internal combustion engine to reduce or eliminate formation of EGR condensate monitor current ambient and operating conditions to determine whether conditions are favorable for condensation of EGR gases, and control the engine accordingly to avoid condensation,

A system and method for controlling an internal combustion engine to reduce or eliminate formation of EGR condensate monitor current ambient and operating conditions to determine whether conditions are favorable for condensation of EGR gases, and control the engine accordingly to avoid condensation, preferably by increasing the intake manifold temperature. The intake manifold temperature may be increased by redirecting some or all of the EGR flow to avoid the EGR cooler. Alternatively, or in combination, some or all of the charge air may be redirected to bypass the charge air cooler and/or redirected from the outlet of the turbocharger compressor to the intake, effectively increasing the intake air temperature and resulting in a corresponding increase of the intake manifold temperature. Conditions favorable for condensation may be determined based on engine speed and load, ambient temperature, manifold pressure, scheduled or actual EGR flow rate and scheduled or actual air/fuel ratio. . The apparatus for measuring bio-magnetic fields as defined in claim 15, wherein the computer performs an arithmetic processing of first-order differentiation on the magnetic fields Bzin a z direction with respect to time which is outputted from said signal processing circuit so as to generate at least one first-order differential waveform Bz' of the magnetic fields, the computer performs an arithmetic processing of partial differentiation on said first-order differential waveform Bz' of the magnetic fields with respect to an x variable in an x direction and a y variable in a y direction so as to generate at least one pair of partial differentials εBz'/εxand εBz'/εyof the magnetic fields, the computer performs an arithmetic processing for forming from said partial differentials εBz'/εxand εBz'/εythe contour map by connecting points with an equal {(εBz'/εx)2+(εBz'/εy)2} value at a predetermined time, the computer selectively performs an arithmetic processing for forming the arrow map representing current arrows having Ix={εBz/εx} as an x component and Iy=-{εBz/εy} as a y component at the predetermined time by connecting points with each equal Ixy=(Ix2+Iy2) magnitude value, said contour map and said arrow map are selectively displayed on said display unit, and the z direction is generally perpendicular to a x, y plane and the x, y plane is a front surface of the live body above which the magnetometers are adapted to be arranged. 20. The apparatus for measuring bio-magnetic fields as defined in claim 15, wherein the signal generator includes an oscillator.