A device and method for correcting emissions can include a first sensor that measures a sample of air not containing an exhaust gas, and a second sensor, wherein the exhaust gas enters a settling chamber and a relative humidity of the exhaust gas is measured by the second sensor. A microcomputer can calculate a mass of water vapor in the sample of air measured by the first sensor and in the exhaust gas measured by the second sensor and can determine a dilution factor of the measured exhaust gas. The dilution factor can be used for correcting emissions based on the measurements of the exhaust gas made by the first sensor and the second sensor. The first and second sensors can comprise one or more of, for example, a relative humidity sensor, a dew point sensor, a trace water vapor sensor and/or other types of sensors.

Embodiments may provide a starting device for a gas internal combustion engine whereby non-combusted gas accumulating in the gas internal combustion engine and an exhaust channel is discharged before ignition startup of the gas internal combustion engine and abnormal combustion of the gas internal combustion engine is prevented so as to improve safety, breakage prevention, durability and reliability. A starting device of a gas internal combustion engine 1 having an air starting device 30 includes a rotation-speed detection unit of the gas internal combustion engine 1, a compressed-air introduction unit 5 for supplying compressed air to each of cylinders according to an order of an ignition timing of the gas internal combustion engine 1, a compressed-air supply unit 3 for supplying the compressed air to the compressed-air introduction unit 5, and a control device 2 including a cumulative rotation-speed setting device 21 whereby an operator can set a threshold value of a cumulative rotation speed optionally, the control device 2 being configured to halt supply of the compressed air by the compressed-air supply unit 3 if a set cumulative rotation speed is achieved on the basis of the rotation speed detected by the rotation-speed detection unit.

There is provided a sensor unit 30 arranged in an exhaust system of an internal combustion engine and including a filter member 31 having a plurality of cells divided by porous partition walls and collecting particulate matter in exhaust gas, and at least one pair of electrode members 32, 33 arranged to face each other with the cell interposed therebetween so as to form a capacitor, and a control unit 40 estimating an amount of the particulate matter in the exhaust gas and detecting water present in the exhaust system of the engine, based on an electrostatic capacitance between the pair of electrode members 32, 33.

Methods and systems are provided for operating an engine exhaust aftertreatment system to increase the efficiency of an exhaust underbody catalyst and reduce engine emissions. In one example, a bypass passage may be coupled to a main exhaust passage and during conditions which may adversely affect functionality of the underbody catalyst, exhaust may be opportunistically routed via the bypass passage avoiding the underbody catalyst. Exhaust heat may be recovered via a heat exchanger coupled to the bypass passage, and the heat may be used for engine heating, and passenger cabin heating.

An exhaust heat recovery device of the present invention has: a first pipe through which exhaust from an engine flows; a second pipe that branches-off from the first pipe, and at which is disposed a heat recovery apparatus that carries out heat exchange with the exhaust and recovers exhaust heat; a valve member that adjusts an amount of flow of the exhaust that flows-in from the first pipe to the second pipe; and plural driving members that drive the valve member.

The invention is directed to a method for determining the state of aging of a catalytic converter (2). The disclosed method functions in a non-contacting manner as resonances formed when the catalytic converter (2) located in a housing is excited with high-frequency electromagnetic waves are analyzed.

A system including an exhaust aftertreatment system and a controller coupled to an engine and the exhaust aftertreatment system is provided. The controller is configured to: receive information including at least one of environmental information or operating information regarding the system; determine that a condensation state is present in the exhaust aftertreatment system based on the environmental information and the temperature associated with the exhaust system; and responsive to determining that the condensation state is present, command the engine to operate in a cylinder deactivation mode whereby at least one cylinder of a plurality of cylinders of the engine is deactivated.

A system including an exhaust aftertreatment system and a controller coupled to an engine and the exhaust aftertreatment system is provided. The controller is configured to: receive information including at least one of environmental information or operating information regarding the system; determine that a condensation state is present in the exhaust aftertreatment system based on the environmental information and the temperature associated with the exhaust system; and responsive to determining that the condensation state is present, command the engine to operate in a cylinder deactivation mode whereby at least one cylinder of a plurality of cylinders of the engine is deactivated.

A control device for an internal combustion engine is applied to an internal combustion engine mounted on vehicles in which filters for collecting PM are arranged in an exhaust passage. After the internal combustion engine is started, the control device of the internal combustion engine executes a temperature raising process of raising the upstream side exhaust temperature, which is the temperature of the exhaust gas on the upstream side of the filter in the exhaust passage, until the condensed water of the filter reaches a vaporized state.

A method includes: determining that a condensation state is present in an exhaust aftertreatment system based on received information; and, responsive to determining that the condensation state is present in an exhaust aftertreatment system, implementing a thermal management strategy including activating a heater to increase a temperature associated with the exhaust aftertreatment system.