US6851256B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust emission control device
Assignee: Mitsubishi Motors Corp
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Filing: 2003-03-12
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Granted: 2005-02-08
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Expires: 2023-03-12
Abstract
Abstract An exhaust emission control device has operating condition detecting means for detecting an operating condition of an engine, fuel control means for controlling fuel supply into a combustion chamber of the engine on the basis of an output of the operating condition detecting means, a turbo charger for supercharging a suction air with an exhaust gas of the engine, wherein a filter for capturing particulates in the exhaust gas is disposed in an exhaust gas passage on the downstream side of a turbine of the turbo charger, and the filter holds alkaline metal catalyst. Exhaust gas temperature sensing means senses (or estimates) the exhaust gas temperature near the filter, and supercharging pressure control means controls a supercharging pressure of the turbo charger to be increased when the exhaust gas temperature exceeds a predetermined temperature.
Inventors
- 👤 Tetsuo Chamoto
- 👤 Mikio Terada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:49
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/0002; F02D41/0007; F02D43/00; B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9495; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/023; F01N3/0231; F01N3/0236; F01N9/00; F01N9/002; F01N9/005; F02D41/30; F02D41/32; F02D41/34; F02M; F02M26/00; F02M26/13; F02M26/17; F02M26/21; F02M26/22; F02M26/33; F01N2430/00; F01N2430/08; F01N2510/00; F01N2510/06; F01N2560/00; F01N2560/06; F02B; F02B37/00; F02B37/12; F02B37/18; F02B37/24; F02D41/02; F02D41/021; F02D41/0235; F02D41/027; F02D41/029; F02D41/14; F02D41/1438; F02D41/1444; F02D41/1446; F02M26/02; F02M26/04; F02M26/05; F02M26/09; F02M26/10; F02M26/23; F02M26/52; F02M26/53; F02M31/00; F02M31/20; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
182 words
An exhaust emission control device comprising: operating condition detecting means for detecting an operating condition of an engine; fuel control means for controlling fuel supply into a combustion chamber of the engine on the basis of an output of the operating condition detecting means; a turbo charger having a turbine, the turbo charger supercharging a suction air in accordance with an exhaust gas of the engine; a filter for capturing particulates in the exhaust gas, the filter holding alkaline metal catalyst and disposed in an exhaust gas passage on the downstream side of the turbine of the turbo charger; exhaust gas temperature sensing means for sensing the exhaust gas temperature near the filter; supercharging pressure control means for controlling a supercharging pressure of the turbo charger to be increased when the exhaust gas temperature sensed by the exhaust gas temperature sensing means exceeds a predetermined temperature; and injection timing control means for controlling the fuel injection timing of the fuel control means to be retarded when the supercharging pressure control means controls the supercharging pressure of the turbo charger to be increased.
Claim 2
Dependent Claim
182 words
An exhaust emission control device comprising: operating condition detecting means for detecting an operating condition of an engine; fuel control means for controlling fuel supply into a combustion chamber of the engine on the basis of an output of the operating condition detecting means; a turbo charger having a turbine, the turbo charger supercharging a suction air in accordance with an exhaust gas of the engine; a filter for capturing particulates in the exhaust gas, the filter holding alkaline metal catalyst and disposed in an exhaust gas passage on the downstream side of the turbine of the turbo charger; exhaust gas temperature sensing means for sensing the exhaust gas temperature near the filter; supercharging pressure control means for controlling a supercharging pressure of the turbo charger to be increased when the exhaust gas temperature sensed by the exhaust gas temperature sensing means exceeds a predetermined temperature; and injection timing control means for controlling the fuel injection timing of the fuel control means to be retarded when the supercharging pressure control means controls the supercharging pressure of the turbo charger to be increased.
Claim 3
Dependent Claim
55 words
The exhaust emission control device according to claim 1 , wherein the turbo charger is constituted of a variable capacity turbo, in which the supercharging pressure control means controls the variable capacity turbo to increase the supercharging pressure when the exhaust gas temperature sensed by the exhaust gas temperature sensing means exceeds the predetermined temperature.
Claim 4
Dependent Claim
86 words
The exhaust emission control device according to claim 1 , wherein the turbo charger has a bypass passage for communicating the upstream side and the downstream side of the turbine, and a control valve for regulating the amount of exhaust gas to bypass the turbine via the bypass passage, in which the supercharging pressure control means decreases the amount of exhaust gas to be bypassed by the control valve when the exhaust gas temperature sensed by the exhaust gas temperature sensing means exceeds the predetermined temperature.
Claim 5
Dependent Claim
60 words
The exhaust emission control device according to claim 1 , wherein the supercharging pressure control means controls the supercharging pressure of the turbo charger to be increased when the exhaust gas temperature sensed by the exhaust gas temperature sensing means exceeds the predetermined temperature and the engine sensed by the operating condition sensing means is subject to a predetermined load.
Claim 6
Dependent Claim
222 words
An exhaust emission control device comprising: operating condition detecting means for detecting an operating condition of an engine; fuel control means for controlling fuel supply into a combustion chamber of the engine on the basis of an output of the operating condition detecting means; a turbo charger for supercharging a suction air in accordance with an exhaust gas of the engine; a filter for capturing particulates in the exhaust gas, the filter holding alkaline metal catalyst and disposed in an exhaust gas passage on the downstream side of a turbine of the turbo charger; exhaust gas temperature sensing means for sensing the exhaust gas temperature near the filter; and supercharging pressure control means for controlling a supercharging pressure of the turbo charger to be increased when the exhaust gas temperature sensed by the exhaust gas temperature sensing means exceeds a predetermined temperature wherein the operating condition sensing means has load change rate detecting means for detecting the rate of change for the load of the engine, in which the supercharging pressure control means controls the supercharging pressure of the turbo charger to be increased when the exhaust gas temperature sensed by the exhaust gas temperature sensing means exceeds the predetermined temperature and the rate of change for the engine load detected by the load change rate detecting means is a positive value.
Claim 7
Dependent Claim
222 words
An exhaust emission control device comprising: operating condition detecting means for detecting an operating condition of an engine; fuel control means for controlling fuel supply into a combustion chamber of the engine on the basis of an output of the operating condition detecting means; a turbo charger for supercharging a suction air in accordance with an exhaust gas of the engine; a filter for capturing particulates in the exhaust gas, the filter holding alkaline metal catalyst and disposed in an exhaust gas passage on the downstream side of a turbine of the turbo charger; exhaust gas temperature sensing means for sensing the exhaust gas temperature near the filter; and supercharging pressure control means for controlling a supercharging pressure of the turbo charger to be increased when the exhaust gas temperature sensed by the exhaust gas temperature sensing means exceeds a predetermined temperature wherein the operating condition sensing means has load change rate detecting means for detecting the rate of change for the load of the engine, in which the supercharging pressure control means controls the supercharging pressure of the turbo charger to be increased when the exhaust gas temperature sensed by the exhaust gas temperature sensing means exceeds the predetermined temperature and the rate of change for the engine load detected by the load change rate detecting means is a positive value.
Claim 8
Dependent Claim
166 words
An exhaust emission control device comprising: operating condition detecting means for detecting an operating condition of an engine; fuel control means for controlling fuel supply into a combustion chamber of the engine on the basis of an output of the operating condition detecting means; a turbo charger for supercharging a suction air in accordance with an exhaust gas of the engine; a filter for capturing particulates in the exhaust gas, the filter holding alkaline metal catalyst and disposed in an exhaust gas passage on the downstream side of a turbine of the turbo charger; exhaust gas temperature sensing means for sensing the exhaust gas temperature near the filter; and supercharging pressure control means for controlling a supercharging pressure of the turbo charger to be increased when the exhaust gas temperature sensed by the exhaust gas temperature sensing means exceeds a predetermined temperature wherein the exhaust gas passage has oxidation catalyst disposed on the upstream side of the filter and on the downstream side of the turbine.
Claim 9
Dependent Claim
166 words
An exhaust emission control device comprising: operating condition detecting means for detecting an operating condition of an engine; fuel control means for controlling fuel supply into a combustion chamber of the engine on the basis of an output of the operating condition detecting means; a turbo charger for supercharging a suction air in accordance with an exhaust gas of the engine; a filter for capturing particulates in the exhaust gas, the filter holding alkaline metal catalyst and disposed in an exhaust gas passage on the downstream side of a turbine of the turbo charger; exhaust gas temperature sensing means for sensing the exhaust gas temperature near the filter; and supercharging pressure control means for controlling a supercharging pressure of the turbo charger to be increased when the exhaust gas temperature sensed by the exhaust gas temperature sensing means exceeds a predetermined temperature wherein the exhaust gas passage has oxidation catalyst disposed on the upstream side of the filter and on the downstream side of the turbine.
Claim 10
Dependent Claim
25 words
The exhaust emission control device according to claim 1 , wherein the predetermined temperature is a temperature at which the alkaline metal catalyst causes depression.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2008-02-08 | 2008-08-09 | 2009-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2012-02-08 | 2012-08-09 | 2013-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2016-02-08 | 2016-08-09 | 2017-02-08 | $7700.00 | Window Closed / Lapsed |