Vehicle control method and vehicle control device
AssigneeNissan Motor Co., Ltd.
InventorsJin YOKOYAMA, Kouichi MURAKAMI, Akikazu SAKAI
Life of this patent
Estimating the term…
Abstract
An under-floor catalyst (33) includes a GPF (41) capable of trapping fine exhaust particles in exhaust gas, and a downstream-side catalyst (42) positioned on the downstream side of GPF (41). GPF (41) can be supplied with secondary air. When an internal combustion engine (10) is stopped during travel, the secondary air is supplied to GPF (41) in which the fine exhaust particles are accumulated. At this time, the temperature of GPF (41) is equal to or higher than a predetermined temperature. Thus, a deterioration in the exhaust gas purification performance of under-floor catalyst (33) at the time of the start of internal combustion engine (10) can be suppressed.
Claims23
-13. (canceled)
A method for controlling a vehicle comprising an internal combustion engine and an exhaust gas purification apparatus provided in an exhaust passage of the internal combustion engine, wherein the exhaust gas purification apparatus includes an exhaust particulate filter capable of trapping fine exhaust particles in exhaust gas, and a three-way catalyst positioned on a downstream side of the exhaust particulate filter, the method comprising:
- supplying oxygen to the exhaust particulate filter in case where the fine exhaust particles are accumulated in the exhaust particulate filter and a temperature of the exhaust particulate filter is equal to or higher than a predetermined temperature, when the internal combustion engine is being stopped during travel,
- wherein a supply quantity of the oxygen to be supplied to the exhaust particulate filter during stopping of the internal combustion engine is set according to a temperature of the oxygen to be supplied to the exhaust particulate filter and the temperature of the exhaust particulate filter.
A method for controlling a vehicle comprising an internal combustion engine and an exhaust gas purification apparatus provided in an exhaust passage of the internal combustion engine, wherein the exhaust gas purification apparatus includes an exhaust particulate filter capable of trapping fine exhaust particles in exhaust gas, and a three-way catalyst positioned on a downstream side of the exhaust particulate filter, the method comprising:
- supplying oxygen to the exhaust particulate filter in case where the fine exhaust particles are accumulated in the exhaust particulate filter and a temperature of the exhaust particulate filter is equal to or higher than a predetermined temperature, when the internal combustion engine is being stopped during travel,
- wherein a supply quantity of the oxygen to be supplied to the exhaust particulate filter during stopping of the internal combustion engine is set such that a heating value at a time when oxidation reaction of the fine exhaust particles accumulated in the exhaust particulate filter occurs becomes larger than a heat radiation quantity of the exhaust particulate filter.
A device for controlling a vehicle, comprising:
- an internal combustion engine;
- an exhaust gas purification apparatus provided in an exhaust passage of the internal combustion engine, and including an exhaust particulate filter capable of trapping fine exhaust particles in exhaust gas, and a three-way catalyst positioned on a downstream side of the exhaust particulate filter;
- an oxygen supply part capable of supplying oxygen to the exhaust particulate filter;
- an exhaust particulate accumulation quantity estimation part for estimating an accumulation quantity of the fine exhaust particles trapped in the exhaust particulate filter;
- an exhaust particulate filter temperature detection part for detecting a temperature of the exhaust particulate filter;
- and
- a control part configured to supply oxygen to the exhaust particulate filter in case where the fine exhaust particles are accumulated in the exhaust particulate filter and the temperature of the exhaust particulate filter is equal to or higher than a predetermined temperature, when the internal combustion engine is being stopped during travel,
- wherein the control part sets a supply quantity of the oxygen to be supplied to the exhaust particulate filter during stopping of the internal combustion engine according to a temperature of the oxygen to be supplied to the exhaust particulate filter and the temperature of the exhaust particulate filter.
A device for controlling a vehicle, comprising:
- an internal combustion engine;
- an exhaust gas purification apparatus provided in an exhaust passage of the internal combustion engine, and including an exhaust particulate filter capable of trapping fine exhaust particles in exhaust gas, and a three-way catalyst positioned on a downstream side of the exhaust particulate filter;
- an oxygen supply part capable of supplying oxygen to the exhaust particulate filter;
- an exhaust particulate accumulation quantity estimation par for estimating an accumulation quantity of the fine exhaust particles trapped in the exhaust particulate filter;
- an exhaust particulate filter temperature detection part for detecting a temperature of the exhaust particulate filter;
- and
- a control part configured to supply oxygen to the exhaust particulate filter in case where the fine exhaust particles are accumulated in the exhaust particulate filter and the temperature of the exhaust particulate filter is equal to or higher than a predetermined temperature, when the internal combustion engine is being stopped during travel,
- wherein the control part sets a supply quantity of the oxygen to be supplied to the exhaust particulate filter during stopping of the internal combustion engine such that a heating value at a time when oxidation reaction of the fine exhaust particles accumulated in the exhaust particulate filter occurs becomes larger than a heat radiation quantity of the exhaust particulate filter.
Dependencies are inferred from the claim text.