US4593524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device for a power-driven air pump for a car
Assignee: Mitsubishi Electric Corp
•
Filing: 1984-09-28
•
Granted: 1986-06-10
•
Expires: 2004-09-28
Abstract
Abstract A control device for a power-driven pump used for a car comprising a d.c. motor, an air pump driven by the d.c. motor and an exhaust device for reburning and purifying exhaust gas from an engine by actuating the air pump, wherein sensors for detecting quantity of air necessary to be fed into the exhaust device to purify the exhaust gas and a variable control device to variably control the revolution speed of the d.c. motor depending on the quantity of air.
Inventors
- 👤 Akio Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:42
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/18; F01N3/22; F01N3/222; F01N9/00; Y; Y02; Y02A; Y02A50/00; Y02A50/20; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A controlled device for a power driver D.C. motor air pump used for an exhaust device for automobiles which reburns and purifies exhaust gas emitted by the engine of said automobile comprising: a plurality of air sensors; means for sensing air quantity each having two terminals; variable control means coupled to plurality of air sensors and said d.c. motor comprising: at least two serially connected relays in which all of said relays, except for one, at the grounded side respectively, have parallel resistors and said plurality of air sensors corresponding in number to said relays, one terminal of each of said air sensors is connected to a field coil of each of said relays and the other terminal of said air sensor is grounded when said each sensor is actuated.
Claim 2
Dependent Claim
130 words
A controlled device for a power driver D.C. motor air pump used for an exhaust device for automobiles which reburns and purifies exhaust gas emitted by the engine of said automobile comprising: a plurality of air sensors; means for sensing air quantity each having two terminals; variable control means coupled to plurality of air sensors and said d.c. motor comprising: at least two serially connected relays in which all of said relays, except for one, at the grounded side respectively, have parallel resistors and said plurality of air sensors corresponding in number to said relays, one terminal of each of said air sensors is connected to a field coil of each of said relays and the other terminal of said air sensor is grounded when said each sensor is actuated.
References Cited (Backward Citations)
US1419316A
Cited
US2439239A
Cited
US2981195A
Cited
US3503716A
Cited
DE2101176A1
Cited
DE2124623A1
Cited
US4098078A
Cited
DE2326989A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |