US 9,518,897 B2 · Intelligent bag filling for exhaust sampling system

Abstract

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 at an extraction rate. 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 control the extraction rate of the first sample probe based on a time during a test phase at which the engine is switched to an ON state.

Claims30

Dependent claims

An exhaust sampling system for an engine, the exhaust sampling system comprising:

a dilution tunnel in which exhaust gas from the engine is diluted with a first diluent gas;
an exhaust collection unit including at least one collection bag that selectively receives said diluted exhaust gas;
a first sample probe in fluid communication with said dilution tunnel and operable to selectively supply said at least one collection bag with a portion of said diluted exhaust gas during a test phase;
and
a controller operable to permit flow of said diluted exhaust gas from said first sample probe to said at least one collection bag in a first state and operable to prevent flow of said diluted exhaust gas from said first sample probe to said at least one collection bag in a second state, said controller selectively supplying a second diluent gas to said at least one collection bag during said test phase and selectively preventing flow of said second diluent gas to said at least one collection bag during said test phase.

2 more elements

An exhaust sampling system for sampling, during a test phase having a predetermined duration, the exhaust gas from an engine for a hybrid vehicle that is switched between an ON state and an OFF state over the duration of said test phase, the exhaust sampling system comprising:

a sample bag;
a diluent source configured to supply diluent for diluting said exhaust gas;
a sample probe configured to receive said diluted exhaust gas;
a first valve operable to control flow of said diluted exhaust gas from said sample probe to said sample bag;
and
a controller that controls said first valve to:
allow the flow of said diluted exhaust gas from said sample probe to said sample bag when the engine is in said ON state;
selectively prevent the flow of said diluent from said sample probe to said sample bag when the engine is switched to an OFF state during said test phase;
and
selectively allow the flow of said diluent from said diluent source to said sample bag during the test phase when the engine is in an OFF state.

7 more elements

An exhaust sampling system for an engine, the exhaust sampling system comprising:

a dilution tunnel in which exhaust gas from the engine is diluted with a diluent gas;
an exhaust collection unit including at least one collection bag that selectively receives said diluted exhaust gas;
a sample probe in fluid communication with said dilution tunnel and operable to selectively supply said at least one collection bag with a portion of said diluted exhaust gas during a test phase;
and
a controller operable to:
allow flow of said diluted exhaust gas from said sample probe to said at least one collection bag when the engine is in an ON state during said test phase;
selectively prevent the flow of said diluent gas from said sample probe to said at least one collection bag when the engine is in an OFF state during said test phase;
and
selectively allow the flow of said diluent gas from said sample probe to said at least one collection bag when the engine is in said OFF state during said test phase.

6 more elements

Dependencies are inferred from the claim text.

Intelligent bag filling for exhaust sampling system

Life of this patent

Intelligent bag filling for exhaust sampling system

Life of this patent

Abstract

Claims30