摘要:
An engine control system of a vehicle includes a first temperature module, a second temperature module, and an exhaust gas recirculation (EGR) control module. The first temperature module determines a temperature of gas within an intake manifold of an engine. The second temperature module determines a temperature of an EGR conduit that is coupled to the intake manifold. The EGR control module reduces opening of an EGR valve when the temperature of the gas and the temperature of the conduit is greater than a predetermined temperature.
摘要:
An apparatus for estimating temperatures of a vehicle includes an acquirer to acquire an engine correlated temperature correlated with the temperature of an engine when the engine is stopping. The apparatus further includes an estimator to estimate a catalyst temperature of a catalyst disposed in an exhaust system of the engine, based on an inlet gas temperature estimated through a first-order lag operation with an exhaust-manifold temperature at a stop of the engine as an initial temperature and the engine correlated temperature as a target temperature.
摘要:
Methods and systems are provided for operating an engine including a first and a second bank of cylinders. One example method comprises, adjusting engine injection timing based on a first temperature of a first intake of the first bank and a second temperature of a second intake of the second bank.
摘要:
An engine includes an intake manifold mixing an intake air flow and an exhaust gas recirculation flow to provide an intake charge flow. A method to estimate an intake charge temperature of the intake charge includes monitoring system conditions for the engine, determining an effect of the mixing upon a specific heat coefficient of the intake charge flow based upon the monitored system conditions, estimating the intake charge temperature based upon the effect of the mixing upon the specific heat coefficient of the intake charge flow and the monitored system conditions, and controlling the engine based upon the estimated intake charge temperature.
摘要:
A method for detecting a failure of a charge air cooler placed in an air supply circuit of an engine, the circuit including an air filter and a compressor. The method is performed continuously and repeatedly. The method includes: determining temperature Tair of the air between the filter and the compressor, the temperature of the air Tapc between the compressor and the cooler, and the temperature of the air Tsras between the cooler and the engine; calculating the Tapc-Tsras/Tapc-Tair ratio, which is a parameter indicative of effectiveness of the cooler; comparing the parameter against a predetermined threshold effectiveness value; and making a diagnosis as to whether the cooler is operating correctly or incorrectly, on the basis of the comparison.
摘要:
An engine air system for charge flow temperature estimation includes a charge air cooler outlet temperature sensor configured to provide a first temperature signal, an exhaust gas recirculation outlet temperature sensor configured to provide a second temperature signal, and a control module configured to receive the first temperature signal and the second temperature signal. The control module includes a charge flow temperature estimation module configured to determine an the estimated charge flow temperature at an intake manifold temperature sensing position based on a combination of the first temperature signal multiplied by an estimated fresh air fraction and the second temperature signal multiplied by an exhaust gas recirculation fraction.
摘要:
Provided is an exhaust purification device for an internal combustion engine, wherein the operation of an internal combustion engine can be prevented from being maintained when a particulate filter is melted. An exhaust purification device is comprised of a particulate filter; a downstream-side temperature sensor which detects a downstream-side exhaust temperature; a filter temperature sensor which detects a filter temperature; an exhaust differential pressure detection device which calculates an exhaust differential pressure between an upstream-side exhaust pressure and a downstream-side exhaust pressure at predetermined time intervals; a notification device; and an ECU which controls the internal combustion engine based on a differential pressure variation first and second exhaust differential pressures or the downstream-side exhaust temperature.
摘要:
Disclosed is a control device applied to an internal combustion engine provided with a fuel vapor treatment system for treating collected fuel vapor by purging the collected fuel vapor into intake air downstream from an air flowmeter (6) and an exhaust gas recirculation system for recirculating part of exhaust gas in the intake air using intake negative pressure. An electronic control unit (22) performs an advance correction corresponding to the exhaust gas recirculation quantity regarding the MBT ignition timing and the knock limit ignition timing, and corrects the volumetric efficiency of the internal combustion engine, which is used for the calculation of the advance correction quantity used for the advance correction, according to the purge air quantity. Consequently, regardless of the decrease of the exhaust gas recirculation quantity caused by the implementation of a large quantity of purge, the appropriate advance corrections of the MBT ignition timing and the knock limit ignition timing become possible.
摘要:
An engine includes an intake manifold mixing an intake air flow and an exhaust gas recirculation flow to provide an intake charge flow. A method to estimate an intake charge temperature of the intake charge includes monitoring system conditions for the engine, determining an effect of the mixing upon a specific heat coefficient of the intake charge flow based upon the monitored system conditions, estimating the intake charge temperature based upon the effect of the mixing upon the specific heat coefficient of the intake charge flow and the monitored system conditions, and controlling the engine based upon the estimated intake charge temperature.
摘要:
An intake air temperature (IAT) sensor diagnostic system may include an IAT determination module, a mass air flow (MAF) module, and a diagnostic module. The IAT determination module determines a measured IAT based on an IAT sensor. The MAF module determines a reference temperature based on a MAF sensor. The diagnostic module determines faults in the IAT sensor based on a comparison between the reference temperature and the measured IAT.