US5765372C1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lean burn engine for automobile
Assignee: Mazda Motor Corp
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Filing: 1995-09-05
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Granted: 2001-07-17
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Expires: 2015-09-05
Abstract
Abstract A lean burn engine adapted to establish a specified air-fuel ratio leaner by predetermined rate than a stoichiometric air-fuel ratio in a range of low engine speeds and low engine loads is provided with an air intake system of a low speed type which provides a high charging efficiency in a range of low engine speeds and an exhaust system capable of eliminating a nitrogen oxide emission in the exhaust even during lean burning. <MATH>
Inventors
- 👤 Noriaki Mitobe
- 👤 Isao Shimizu
- 👤 Kunitomo Minamitani
- 👤 Yasuyoshi Hori
- 👤 Futoshi Nishioka
- 👤 Tetsushi Hosokai
- 👤 Kenji Oka
- 👤 Hideshi Terao
- 👤 Misao Fujimoto
- 👤 Masaki Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:04
CPC Classifications
F; F02; F02D; F02D43/00; F02F; F02F1/00; F02F1/24; F02F1/42; F02F1/4214; F02B; F02B27/00; F02B27/008; F02B31/00; F02B31/08; F02B31/085; F02D41/00; F02D41/0002; F02D41/0025; F02D41/003; F02D41/02; F02D41/14; F02D41/1438; F02D41/1473; F02D41/1475; F02D41/30; F02D41/32; F02D41/34; F02F1/242; F02M; F02M25/00; F02M25/08; F02B1/00; F02B1/02; F02B1/04; F02B23/00; F02B23/08; F02B2023/085; F02B2275/00; F02B2275/18; F02B2275/48; F02F2001/244; F02F2001/245; F02P; F02P9/00; F02P9/002; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y02T10/40
Claims Analysis
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References Cited (Backward Citations)
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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) | 2004-07-16 | 2005-01-15 | 2005-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-07-16 | 2009-01-15 | 2009-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-07-16 | 2013-01-15 | 2013-07-17 | $7700.00 | Window Closed / Lapsed |