US5806310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exhaust purification apparatus
Assignee: Toyota Motor Corp
•
Filing: 1996-04-09
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Granted: 1998-09-15
•
Expires: 2016-04-09
Abstract
Abstract An HC (hydrocarbon) supplementing device is mounted in an exhaust purification device of an internal combustion engine, wherein the amount of HC in the fuel to be added is automatically adjusted to a degree corresponding to the operating conditions of the engine. Accordingly, the supply of just enough HC becomes possible without the use of a complex mechanism for adjusting the supply of HC, and the exhaust gas can be sufficiently purified without wasting fuel.
Inventors
- 👤 Shigeki Daidou
- 👤 Kiyonori Sekiguchi
- 👤 Yoshiyuki Ito
- 👤 Shinya Hirota
- 👤 Masahito Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:48
CPC Classifications
F; F02; F02M; F02M63/00; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/20; F01N3/206; F01N3/2066; F01N3/24; F01N3/36; F02D; F02D1/00; F02D1/16; F02D1/18; F02D1/183; F02M55/00; F02M55/004; F01N2610/00; F01N2610/03; F01N2610/10; F01N2610/107; F01N2610/14; F01N2610/1453; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
166 words
An exhaust purification apparatus provided in an exhaust system of the internal combustion engine, comprising: an exhaust purification device which includes a catalyst assisted in action by a hydrocarbon supplied as a reduction agent, and an HC supplementing device mounted in said exhaust purification apparatus for supplying the hydrocarbon into exhaust gas flowing into said exhaust purification device, wherein said HC supplementing device comprises: an HC takeout portion which takes out one part of the fuel pressurized by a feed pump supplying fuel to a fuel injection pump and provides fuel to an HC supply line under a feed pressure changing in accordance with the operating condition of said internal combustion engine, and an HC supplying device provided where an end of said supply line is opened upstream of said exhaust purification device of said exhaust system to supply an amount of the hydrocarbon into said exhaust purification device determined by said feed pressure changing in accordance with the operating condition of said internal combustion engine.
Claim 2
Dependent Claim
166 words
An exhaust purification apparatus provided in an exhaust system of the internal combustion engine, comprising: an exhaust purification device which includes a catalyst assisted in action by a hydrocarbon supplied as a reduction agent, and an HC supplementing device mounted in said exhaust purification apparatus for supplying the hydrocarbon into exhaust gas flowing into said exhaust purification device, wherein said HC supplementing device comprises: an HC takeout portion which takes out one part of the fuel pressurized by a feed pump supplying fuel to a fuel injection pump and provides fuel to an HC supply line under a feed pressure changing in accordance with the operating condition of said internal combustion engine, and an HC supplying device provided where an end of said supply line is opened upstream of said exhaust purification device of said exhaust system to supply an amount of the hydrocarbon into said exhaust purification device determined by said feed pressure changing in accordance with the operating condition of said internal combustion engine.
Claim 3
Dependent Claim
32 words
An exhaust purification apparatus as set forth in claim 1, wherein said HC takeout portion is mounted in a drain portion provided in a low pressure chamber of said fuel injection pump.
Claim 4
Dependent Claim
26 words
An exhaust purification apparatus as set forth in claim 1, wherein said HC takeout portion is mounted in an automatic timer of said fuel injection pump.
Claim 5
Dependent Claim
21 words
An exhaust purification apparatus as set forth in claim 1, wherein said HC supplying device includes an electrically heated heat generator.
Claim 6
Dependent Claim
23 words
An exhaust purification apparatus as set forth in claim 1, further comprising a control valve provided in the middle of said supply line.
Claim 7
Dependent Claim
20 words
An exhaust purification apparatus as set forth in claim 5, further comprising a control circuit for controlling said control valve.
Claim 8
Dependent Claim
46 words
An exhaust purification apparatus as set forth in claim 6, further comprising an exhaust temperature sensor provided upstream of said exhaust purification device of the exhaust system of said internal combustion engine, an output signal of said exhaust temperature sensor being input to said control circuit.
Claim 9
Dependent Claim
24 words
An exhaust purification apparatus as set forth in claim 1, further comprising a throttle portion provided in the middle of said HC supply line.
Claim 10
Dependent Claim
23 words
An exhaust purification apparatus as set forth in claim 8, further comprising a control valve provided in the middle of said supply line.
Claim 11
Dependent Claim
20 words
An exhaust purification apparatus as set forth in claim 9, further comprising a control circuit for controlling said control valve.
Claim 12
Dependent Claim
46 words
An exhaust purification apparatus as set forth in claim 10, further comprising an exhaust temperature sensor provided upstream of said exhaust purification device of the exhaust system of said internal combustion engine, an output signal of said exhaust temperature sensor being input to said control circuit.
Claim 13
Dependent Claim
35 words
An exhaust purification apparatus as set forth in claim 8, wherein said throttle portion is a variable throttle with an opening area which changes in accordance with the operating condition of said internal combustion engine.
Claim 14
Dependent Claim
23 words
An exhaust purification apparatus as set forth in claim 12, further comprising a control valve provided in the middle of said supply line.
Claim 15
Dependent Claim
20 words
An exhaust purification apparatus as set forth in claim 13, further comprising a control circuit for controlling said control valve.
Claim 16
Dependent Claim
46 words
An exhaust purification apparatus as set forth in claim 14, further comprising an exhaust temperature sensor provided upstream of said exhaust purification device of the exhaust system of said internal combustion engine, an output signal of said exhaust temperature sensor being input to said control circuit.
Claim 17
Dependent Claim
175 words
An exhaust purification apparatus provided in an exhaust system of the internal combustion engine, comprising: an exhaust purification device for purifying exhaust gas from said internal combustion engine, and an HC supplementing device mounted in said exhaust purification apparatus for supplying a hydrocarbon into the exhaust gas flowing into said exhaust purification device for assisting the function of said device, wherein said HC supplementing device comprises: an HC takeout portion which takes out one part of the fuel pressurized by a feed pump supplying fuel to a fuel injection pump and provides fuel to an HC supply line under a feed pressure changing in accordance with the operating condition of said internal combustion engine, an HC supplying device provided where an end of said supply line is opened upstream of said exhaust purification device of said exhaust system, and a throttle portion provided in the middle of said HC supply line, said throttle portion being a variable throttle with an opening area which changes in accordance with the operating condition of said internal combustion engine.
Claim 18
Dependent Claim
175 words
An exhaust purification apparatus provided in an exhaust system of the internal combustion engine, comprising: an exhaust purification device for purifying exhaust gas from said internal combustion engine, and an HC supplementing device mounted in said exhaust purification apparatus for supplying a hydrocarbon into the exhaust gas flowing into said exhaust purification device for assisting the function of said device, wherein said HC supplementing device comprises: an HC takeout portion which takes out one part of the fuel pressurized by a feed pump supplying fuel to a fuel injection pump and provides fuel to an HC supply line under a feed pressure changing in accordance with the operating condition of said internal combustion engine, an HC supplying device provided where an end of said supply line is opened upstream of said exhaust purification device of said exhaust system, and a throttle portion provided in the middle of said HC supply line, said throttle portion being a variable throttle with an opening area which changes in accordance with the operating condition of said internal combustion engine.
Claim 19
Dependent Claim
18 words
An exhaust purification apparatus as set forth in claim 13, wherein said exhaust purification device includes a catalyst.
Claim 20
Dependent Claim
32 words
An exhaust purification apparatus as set forth in claim 13, wherein said HC takeout portion is mounted in a drain portion provided in the low pressure chamber of said fuel injection pump.
Claim 21
Dependent Claim
26 words
An exhaust purification apparatus as set forth in claim 13, wherein said HC takeout portion is mounted in an automatic timer of said fuel injection pump.
Claim 22
Dependent Claim
21 words
An exhaust purification apparatus as set forth in claim 13, wherein said HC supplying device includes an electrically heated heat generator.
Claim 23
Dependent Claim
23 words
An exhaust purification apparatus as set forth in claim 16, further comprising a control valve provided in the middle of said supply line.
Claim 24
Dependent Claim
20 words
An exhaust purification apparatus as set forth in claim 21, further comprising a control circuit for controlling said control valve.
Claim 25
Dependent Claim
46 words
An exhaust purification apparatus as set forth in claim 22, further comprising an exhaust temperature sensor provided upstream of said exhaust purification device of the exhaust system of said internal combustion engine, an output signal of said exhaust temperature sensor being input to said control circuit.
Claim 26
Dependent Claim
161 words
An exhaust purification apparatus provided in an exhaust system of the internal combustion engine, comprising: an exhaust purification device for purifying exhaust gas from said internal combustion engine, and an HC supplementing device mounted in said exhaust purification apparatus for supplying a hydrocarbon into the exhaust gas flowing into said exhaust purification device for assisting the function of said device, wherein said HC supplementing device comprises: an HC takeout portion which takes out one part of the fuel pressurized by a feed pump supplying fuel to a fuel injection pump and provides fuel to an HC supply line under a feed pressure changing in accordance with the operating condition of said internal combustion engine, and an HC supplying device provided where an end of said supply line is opened upstream of said exhaust purification device of said exhaust system, wherein said HC takeout portion is mounted in a drain portion provided in a low pressure chamber of said fuel injection pump.
Claim 27
Dependent Claim
161 words
An exhaust purification apparatus provided in an exhaust system of the internal combustion engine, comprising: an exhaust purification device for purifying exhaust gas from said internal combustion engine, and an HC supplementing device mounted in said exhaust purification apparatus for supplying a hydrocarbon into the exhaust gas flowing into said exhaust purification device for assisting the function of said device, wherein said HC supplementing device comprises: an HC takeout portion which takes out one part of the fuel pressurized by a feed pump supplying fuel to a fuel injection pump and provides fuel to an HC supply line under a feed pressure changing in accordance with the operating condition of said internal combustion engine, and an HC supplying device provided where an end of said supply line is opened upstream of said exhaust purification device of said exhaust system, wherein said HC takeout portion is mounted in a drain portion provided in a low pressure chamber of said fuel injection pump.
Claim 28
Dependent Claim
18 words
An exhaust purification apparatus as set forth in claim 24, wherein said exhaust purification device includes a catalyst.
Claim 29
Dependent Claim
21 words
An exhaust purification apparatus as set forth in claim 24, wherein said HC supplying device includes an electrically heated heat generator.
Claim 30
Dependent Claim
23 words
An exhaust purification apparatus as set forth in claim 24, further comprising a control valve provided in the middle of said supply line.
Claim 31
Dependent Claim
20 words
An exhaust purification apparatus as set forth in claim 27, further comprising a control circuit for controlling said control valve.
Claim 32
Dependent Claim
24 words
An exhaust purification apparatus as set forth in claim 24, further comprising a throttle portion provided in the middle of said HC supply line.
Claim 33
Dependent Claim
22 words
An exhaust purification apparatus as set forth in claim 29, further comprising a control valve in the middle of said supply line.
Claim 34
Dependent Claim
20 words
An exhaust purification apparatus as set forth in claim 30, further comprising a control circuit for controlling said control valve.
Claim 35
Dependent Claim
155 words
An exhaust purification apparatus provided in an exhaust system of the internal combustion engine, comprising: an exhaust purification device for purifying exhaust gas from said internal combustion engine, and an HC supplementing device mounted in said exhaust purification apparatus for supplying a hydrocarbon into the exhaust gas flowing into said exhaust purification device for assisting the function of said device, wherein said HC supplementing device comprises: an HC takeout portion which takes out one part of the fuel pressurized by a feed pump supplying fuel to a fuel injection pump and provides fuel to an HC supply line under a feed pressure changing in accordance with the operating condition of said internal combustion engine, and an HC supplying device provided where an end of said supply line is opened upstream of said exhaust purification device of said exhaust system, wherein said HC takeout portion is mounted in an automatic timer of said fuel injection pump.
Claim 36
Dependent Claim
155 words
An exhaust purification apparatus provided in an exhaust system of the internal combustion engine, comprising: an exhaust purification device for purifying exhaust gas from said internal combustion engine, and an HC supplementing device mounted in said exhaust purification apparatus for supplying a hydrocarbon into the exhaust gas flowing into said exhaust purification device for assisting the function of said device, wherein said HC supplementing device comprises: an HC takeout portion which takes out one part of the fuel pressurized by a feed pump supplying fuel to a fuel injection pump and provides fuel to an HC supply line under a feed pressure changing in accordance with the operating condition of said internal combustion engine, and an HC supplying device provided where an end of said supply line is opened upstream of said exhaust purification device of said exhaust system, wherein said HC takeout portion is mounted in an automatic timer of said fuel injection pump.
Claim 37
Dependent Claim
18 words
An exhaust purification apparatus as set forth in claim 32, wherein said exhaust purification device includes a catalyst.
Claim 38
Dependent Claim
21 words
An exhaust purification apparatus as set forth in claim 32, wherein said HC supply device includes an electrically heated heat generator.
Claim 39
Dependent Claim
24 words
An exhaust purification apparatus as set forth in claim 32, further comprising a throttle portion provided in the middle of said HC supply line.
Claim 40
Dependent Claim
24 words
An exhaust purification apparatus as set forth in claim 35, further comprising a control valve is provided in the middle of said supply line.
Claim 41
Dependent Claim
20 words
An exhaust purification apparatus as set forth in claim 36, further comprising a control circuit for controlling said control valve.
Claim 42
Dependent Claim
46 words
An exhaust purification apparatus as set forth in claim 37, further comprising an exhaust temperature sensor provided upstream of said exhaust purification device of the exhaust system of said internal combustion engine, an output signal of said exhaust temperature sensor being input to said control circuit.
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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) | 2001-09-14 | 2002-03-16 | 2002-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-14 | 2006-03-16 | 2006-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-14 | 2010-03-16 | 2010-09-15 | $7700.00 | Window Closed / Lapsed |