Abstract: An in-vehicle exhaust gas analysis system, which is provided with a flowmeter, and an exhaust gas analyzer to analyze a concentration of a measurement target component contained in exhaust gas, includes a standard gas supply mechanism to supply a standard gas containing a predetermined component to the flowmeter and the exhaust gas analyzer. The system is configured to include a detected mass calculation section to calculate a detected mass of a predetermined component by using a flow rate obtained by the flowmeter and a concentration of the predetermined component obtained by the exhaust gas analyzer, a supply mass acquisition section to acquire a supply mass of the predetermined component supplied from the standard gas supply mechanism to the flowmeter and the exhaust gas analyzer, and a mass comparison section to compare a detected mass calculated by the mass calculation section and a supply mass acquired by the supply mass acquisition section.

Abstract: An in-vehicle exhaust gas analysis system, which is provided with a flowmeter, and an exhaust gas analyzer to analyze a concentration of a measurement target component contained in exhaust gas, includes a standard gas supply mechanism to supply a standard gas containing a predetermined component to the flowmeter and the exhaust gas analyzer. The system is configured to include a detected mass calculation section to calculate a detected mass of a predetermined component by using a flow rate obtained by the flowmeter and a concentration of the predetermined component obtained by the exhaust gas analyzer, a supply mass acquisition section to acquire a supply mass of the predetermined component supplied from the standard gas supply mechanism to the flowmeter and the exhaust gas analyzer, and a mass comparison section to compare a detected mass calculated by the mass calculation section and a supply mass acquired by the supply mass acquisition section.

Abstract: A verification system includes a reference gas supply part that supplies reference gas in place of exhaust gas and is configured to be able to verify the consistency between a supply amount of the reference gas from the reference gas supply part and a measured value of the reference gas measured by an analyzer. The verification system further includes a control part that receives a setting flow rate signal that is a signal indicating a setting flow rate and an analysis range signal that is a signal indicating an analysis range of the analyzer, calculates a target supply amount of the reference gas on the basis of the setting flow rate and the analysis range indicated by the respective signals, and controls the reference gas supply part so as to make the reference gas supply amount by the reference gas supply part equal to the target supply amount.

Abstract: The present invention is intended to reduce noise or vibration occurring in an exhaust gas mixer, and provided with: a mixer main body that has a hollow part extending in an axial direction; an inner pipe part that is provided in the hollow part along the axial direction; a gas introduction part that is provided to the mixer main body, and introduces mixing target gas into a space to spiral the mixing target gas; and a gas lead-out part that is provided in the inner pipe part to lead out the mixing target gas, wherein a central axis of the inner pipe part and a central axis of the hollow part are provided in mutually different positions.

Abstract: In order to provide an exhaust gas dilution device capable of making a flow rate range wider than before, the exhaust gas dilution device is adapted to include a dilution tunnel through which diluent gas such as air flows, an orifice member adapted to block the dilution tunnel except for an orifice hole provided in a central part, and an exhaust gas introduction pipe 1 of which a discharge port is disposed so as to face to the orifice hole and face to a downstream side and through which exhaust gas is discharged from the discharge port into the dilution tunnel. In addition, in the exhaust gas dilution device, the orifice member is formed with a concave part that is gradually concaved from an outer circumferential edge part toward the orifice hole as viewed from an upstream side.

Abstract: The present invention is one that, in measurement of exhaust gases respectively discharged from a first engine and a second engine, reduce a PM measurement error caused by sharing a dilution tunnel, and has: a dilution tunnel for diluting exhaust gas from an engine with dilution air; a diesel exhaust gas introduction path that introduces diesel exhaust gas from a diesel engine DE into the dilution tunnel; and a gasoline exhaust gas introduction path that introduces diluted gasoline exhaust gas from a gasoline engine GE into the dilution tunnel, wherein: the dilution tunnel has a gas mixing part that mixes the diesel exhaust gas introduced by the diesel exhaust gas introduction path and the dilution air with each other; and the gasoline exhaust gas introduction path introduces the gasoline exhaust gas into an upstream side of the gas mixing part in the dilution tunnel.

Abstract: An embodiment of the invention is one that, in the case where a sampling part is configured to include a plurality of venturis, with suppressing an increase in size of an apparatus and an increase in cost, accurately obtains a diluent gas flow rate in accordance with a diluted exhaust gas flow rate obtained on the basis of a combination among the plurality of venturis, in which the sampling part collecting part of diluted exhaust gas is configured to parallel connect the plurality of venturis that control the flow rate of the diluted exhaust gas, and a flow rate control part provided in a diluent gas sampling flow path is configured to parallel connect a plurality of venturis that control the flow rate of diluent gas to be introduced into a diluent gas analyzing device.

Abstract: A verification system includes a reference gas supply part that supplies reference gas in place of exhaust gas and is configured to be able to verify the consistency between a supply amount of the reference gas from the reference gas supply part and a measured value of the reference gas measured by an analyzer. The verification system further includes a control part that receives a setting flow rate signal that is a signal indicating a setting flow rate and an analysis range signal that is a signal indicating an analysis range of the analyzer, calculates a target supply amount of the reference gas on the basis of the setting flow rate and the analysis range indicated by the respective signals, and controls the reference gas supply part so as to make the reference gas supply amount by the reference gas supply part equal to the target supply amount.

Abstract: This invention is an exhaust gas sampling device that samples an exhaust gas by the use of an open-type exhaust gas sampling part and that is for reducing leakage of the exhaust gas produced due to unevenness of flow velocity of a cooling wind around an exhaust gas pipe. The exhaust gas sampling device comprises the exhaust gas sampling part that has an exhaust gas sampling port arranged to face an exhaust gas discharging port of the exhaust gas pipe and that samples the exhaust gas emitted from the exhaust gas discharging port and an ambient gas surrounding the exhaust gas pipe, and the exhaust gas sampling part has an involvement decreasing structure that decreases the exhaust gas flowing out from the exhaust gas sampling port due to involvement of the exhaust gas by the ambient gas that flows in from the exhaust gas sampling port.

Abstract: The present invention is one that downsizes an exhaust gas sampling apparatus such as a CVS as well as uniforming temperature of diluted exhaust gas passing through a flow rate controller such as a critical flow venturi, and has a casing formed with a gas introduction port for introducing the diluted exhaust gas and a gas lead-out port for leading out the diluted exhaust gas, in which a temperature regulating mechanism is contained in the casing, the flow rate controller is fluidly connected to the gas lead-out port, and between the gas introduction port and the temperature regulating mechanism, a dispersion structure that disperses the diluted exhaust gas introduced from the gas introduction port is provided.

Abstract: The present invention is intended to reduce noise or vibration occurring in an exhaust gas mixer, and provided with: a mixer main body that has a hollow part extending in an axial direction; an inner pipe part that is provided in the hollow part along the axial direction; a gas introduction part that is provided to the mixer main body, and introduces mixing target gas into a space to spiral the mixing target gas; and a gas lead-out part that is provided in the inner pipe part to lead out the mixing target gas, wherein a central axis of the inner pipe part and a central axis of the hollow part are provided in mutually different positions.

Abstract: An embodiment of the invention is one that, in the case where a sampling part is configured to include a plurality of venturis, with suppressing an increase in size of an apparatus and an increase in cost, accurately obtains a diluent gas flow rate in accordance with a diluted exhaust gas flow rate obtained on the basis of a combination among the plurality of venturis, in which the sampling part collecting part of diluted exhaust gas is configured to parallel connect the plurality of venturis that control the flow rate of the diluted exhaust gas, and a flow rate control part provided in a diluent gas sampling flow path is configured to parallel connect a plurality of venturis that control the flow rate of diluent gas to be introduced into a diluent gas analyzing device.

Abstract: The present invention is one that, in measurement of exhaust gases respectively discharged from a first engine and a second engine, reduce a PM measurement error caused by sharing a dilution tunnel, and has: a dilution tunnel for diluting exhaust gas from an engine with dilution air; a diesel exhaust gas introduction path that introduces diesel exhaust gas from a diesel engine DE into the dilution tunnel; and a gasoline exhaust gas introduction path that introduces diluted gasoline exhaust gas from a gasoline engine GE into the dilution tunnel, wherein: the dilution tunnel has a gas mixing part that mixes the diesel exhaust gas introduced by the diesel exhaust gas introduction path and the dilution air with each other; and the gasoline exhaust gas introduction path introduces the gasoline exhaust gas into an upstream side of the gas mixing part in the dilution tunnel.

Abstract: An SOF measuring system that can continuously measure SOF and a soot measuring system that can continuously measure soot are connected with an exhaust gas line. The soot measuring system comprises a diluter that selectively dilutes either one of the exhaust gas and standard gas whose hydrocarbon concentration is known with diluent gas and extrudes it. A dilution ratio adjusting device can adjust a dilution ratio of the diluter. A soot detector continuously detects soot in the exhaust gas or the standard gas diluted by the diluter. The SOF measuring system can be connected with the diluter so that an exhaust gas analyzer can measure the hydrocarbon concentration in the standard gas diluted by the diluter.

Abstract: An SOF measuring system that can continuously measure SOF and a soot measuring system that can continuously measure soot are connected with an exhaust gas line. The soot measuring system comprises a diluter that selectively dilutes either one of the exhaust gas and standard gas whose hydrocarbon concentration is known with diluent gas and extrudes it. A dilution ratio adjusting device can adjust a dilution ratio of the diluter. A soot detector continuously detects soot in the exhaust gas or the standard gas diluted by the diluter. The SOF measuring system can be connected with the diluter so that an exhaust gas analyzer can measure the hydrocarbon concentration in the standard gas diluted by the diluter.

Abstract: An SOF measuring system that can continuously measure SOF and a soot measuring system that can continuously measure soot are connected with an exhaust gas line. The soot measuring system comprises a diluter that selectively dilutes either one of the exhaust gas and standard gas whose hydrocarbon concentration is known with diluent gas and extrudes it. A dilution ratio adjusting device can adjust a dilution ratio of the diluter. A soot detector continuously detects soot in the exhaust gas or the standard gas diluted by the diluter. The SOF measuring system can be connected with the diluter so that an exhaust gas analyzer can measure the hydrocarbon concentration in the standard gas diluted by the diluter.