AVL Inc

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A mixing system for an exhaust sampling system is disclosed. In one example, the mixing system includes a mixing passage, an exhaust pipe, and a mixer. The mixing passage has a dilution gas inlet configured to receive a dilution gas. The exhaust pipe provides exhaust gas to the mixing passage. The mixer is disposed within the mixing passage and is configured to mix the dilution gas and the exhaust gas. The mixer has an inlet and an outlet, where the mixer inlet is configured to receive the exhaust gas, and the mixer outlet is disposed downstream of the mixer inlet. The mixer includes a plurality of radially extending lobes that are circumferentially disposed about a longitudinal axis of the mixer.


Patent
AVL Inc | Date: 2016-11-14

An exhaust sampling system for an engine is provided. The exhaust sampling system may include a source of exhaust gas, an exhaust collection unit including at least one collection bag that selectively receives the exhaust gas, and a sample probe in fluid communication with the source of exhaust gas that selectively supplies the at least one collection bag with the exhaust gas. The exhaust sampling system may also include a controller that permits flow of the exhaust gas from the sample probe to the at least one collection bag in a first state and prevents flow of the exhaust gas from the sample probe to the at least one collection bag in a second state. The controller may determine an extraction rate of the sample probe based on an ON time of the engine during a test phase.


A mixing system for an exhaust sampling system is disclosed. In one example, the mixing system includes a mixing passage, an exhaust pipe, and a mixer. The mixing passage has a dilution gas inlet configured to receive a dilution gas. The exhaust pipe provides exhaust gas to the mixing passage. The mixer is disposed within the mixing passage and is configured to mix the dilution gas and the exhaust gas. The mixer has an inlet and an outlet, where the mixer inlet is configured to receive the exhaust gas, and the mixer outlet is disposed downstream of the mixer inlet. The mixer includes a plurality of radially extending lobes that are circumferentially disposed about a longitudinal axis of the mixer.


Patent
AVL Inc | Date: 2015-12-23

A dual-purpose dynamometer assembly (20a, 20b, 20c) is disclosed including a dynamometer motor (56), a chassis dynamometer roll (28) that can be driven by a vehicle wheel (24), and a powertrain dynamometer shaft (40) that can be driven by a vehicle powertrain. A gearbox (90) is disposed between and rotatably couples the dynamometer motor (56) with the chassis dynamometer roll (28) and the powertrain dynamometer shaft (40). At least one chamber wall (62) defining a test chamber (60) is disposed between the dynamometer motor (56) on one side and the chassis dynamometer roll (28) and the powertrain dynamometer shaft (40) on the other side such that the dynamometer motor (56) is disposed outside of the test chamber (60). There is at least one aperture (134, 168, 170) penetrating the chamber wall (62) through which the dynamometer motor (56) is connected to the chassis dynamometer roll (28) and the powertrain dynamometer shaft (40). Accordingly, the dynamometer motor (56) is isolated from extreme temperatures within the test chamber (60).


Patent
AVL Inc | Date: 2015-08-03

An engine emissions test system according to the principles of the present disclosure includes a sampling conduit, at least one sample bag, a read circuit, and a fill circuit. The sampling conduit is configured to receive exhaust from an engine. The at least one sample bag is configured to store a sample of exhaust. The read circuit is configured to communicate the stored sample of exhaust between the at least one sample bag and an analyzer. The fill circuit includes a fill gas line configured to provide a fill gas to be mixed with the sample of exhaust. The fill gas line extends between a fill gas source and the read circuit.


Patent
AVL Inc | Date: 2013-05-28

An exhaust sampling system for an engine is provided. The exhaust sampling system may include a source of exhaust gas, an exhaust collection unit including at least one collection bag that selectively receives the exhaust gas, and a first sample probe in fluid communication with the source of exhaust gas that selectively supplies the at least one collection bag with the exhaust gas. The exhaust sampling system may also include a controller that permits flow of the exhaust gas from the first sample probe to the at least one collection bag in a first state and prevents flow of the exhaust gas from the first sample probe to the at least one collection bag in a second state. The controller may determine an extraction rate of the first sample probe based on an ON time of the engine during a sampling period.


Disclosed is an exhaust sampling system including a plurality of exhaust sampling system zones. The zones are, at least, a sampling conduit, a fill circuit, and a read circuit. A controller is programmed to predict a minimum dilution ratio to avoid condensation in one of the exhaust sampling system zones. The controller is further programmed to run a test procedure in which a sample of exhaust is diluted with a make-up gas at a selected minimum dilution ratio that is greater than or equal to the predicted minimum dilution ratio. Further disclosed are methods of predicting whether condensation occurs during a test procedure.


Patent
AVL Inc | Date: 2016-12-07

The present invention relates to a method of determining an inverse convolution function. The method includes determining an idealized convolution function, the idealized convolution function being in the time domain; transforming the idealized convolution function from the time domain to the frequency domain; dividing a regularizing filter function by the transformed idealized convolution function, the result being the inverse convolution function in the frequency domain; and transforming the inverse convolution function from the frequency domain to the time domain.


Patent
AVL Inc | Date: 2013-08-29

A thermal management system for a battery pack having at least one battery cell is provided. The thermal management system may include a cooling plate disposed adjacent to the at least one battery cell. The cooling plate may include thermal pyrolytic graphite (TPG) to dissipate heat away from the at least one battery cell.


Patent
AVL Inc | Date: 2015-06-04

A dual-purpose dynamometer assembly is disclosed including a dynamometer motor, a chassis dynamometer roll that can be driven by a vehicle wheel, and a powertrain dynamometer shaft that can be driven by a vehicle powertrain. A gearbox is disposed between and rotatably couples the dynamometer motor with the chassis dynamometer roll and the powertrain dynamometer shaft. At least one chamber wall defining a test chamber is disposed between the dynamometer motor on one side and the chassis dynamometer roll and the powertrain dynamometer shaft on the other side such that the dynamometer motor is disposed outside of the test chamber. There is at least one aperture penetrating the chamber wall through which the dynamometer motor is connected to the chassis dynamometer roll and the powertrain dynamometer shaft. Accordingly, the dynamometer motor is isolated from extreme temperatures within the test chamber.

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