Exhaust gas analysis method and exhaust gas analysis system

Patent metadata

Field	Value
Publication number	US-10995689-B2
Application number	US-201916418356-A
Country	US
Kind code	B2
Filing date	May 21, 2019
Priority date	May 21, 2018
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

In order to separately evaluate an influence degree of fuel and an influence degree of lubricating oil with respect to particulate matters contained in exhaust gas, an exhaust gas analysis method includes: analyzing particulate matters contained in the exhaust gas exhausted from an engine, thereby making it possible to analyze the particulate matters derived from the lubricating oil by using isooctane as a fuel.

First claim

The invention claimed is:

1. An exhaust gas analysis method for analyzing exhaust gas exhausted from an engine comprising:
supplying only isooctane to the engine as a fuel;
analyzing exhaust gas exhausted from the engine while supplying only isooctane to the engine as a fuel; and
measuring particulate matters contained in the analyzed exhaust gas as particulate matters derived only from lubrication oil in the engine.

2. The exhaust gas analysis method according to claim 1 , wherein, responsive to changing operating conditions of the engine, a number or mass of the particulate matters contained in the exhaust gas exhausted from the engine is measured.

3. The exhaust gas analysis method according to claim 2 , wherein at least one of a revolution speed of the engine, a load applied to the engine, and a temperature of coolant of the engine is included as the operating conditions.

4. The exhaust gas analysis method according to claim 1 , further comprising:
measuring a total sulfur component concentration contained in the exhaust gas as a concentration of a sulfur component derived from the lubricating oil;
calculating a consumption amount of the lubricating oil based on the total sulfur component concentration; and
linking the consumption amount with the measurement result of the particulate matters derived from the lubricating oil.

5. The exhaust gas analysis method according to claim 1 , wherein the engine is a gasoline engine.

Assignees

• Subaru Corp
• Horiba Ltd

Inventors

• Kiya Yasuyuki
• Tobe Shota
• Tabata Kunio
• Takeda Kenji

Classifications

• F01N11/00

  Monitoring or diagnostic devices for exhaust-gas treatment apparatus · CPC title

• F02D35/0015

  using exhaust gas sensors (F02D41/14 takes precedence) · CPC title

• F01N2560/05

  the means being a particulate sensor · CPC title

• G01N33/287

  Sulfur content · CPC title

• Y02T10/30

  Use of alternative fuels, e.g. biofuels · CPC title