US4667645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device for diesel engine intake air heater and priming fluid injection system
Assignee: AP ELECTRONICS Inc
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Filing: 1986-05-16
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Granted: 1987-05-26
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Expires: 2006-05-16
Abstract
Abstract An electronic device controlling the intake manifold heater and priming fluid injection system in diesel engines. The device automatically energizes the intake manifold heater and enables the priming fluid injector in response to electrical signals received from a coolant temperature sensor and a lubricating oil pressure sensor so as to improve cold starting, cold driveability, fuel consumption, gas emissions, and to eliminate white smoke at the exhaust. The device prevents the priming fluid injector from being operated until after the intake manifold heater has cooled to a level preventing ignition of the priming fluid, such as ether, in the intake manifold.
Inventors
- 👤 Dorian Gluckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:03
CPC Classifications
F; F02; F02N; F02N19/00; F02N19/001; F02M; F02M31/00; F02M31/02; F02M31/04; F02M31/042; F02M31/12; F02M31/13; F02B; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
84 words
In combination with a diesel engine having an intake manifold provided with an electrical heater for heating incoming air through said intake manifold and a primer injector for injecting a priming fluid in said intake manifold, said engine having an oil pressure lubrication system and a coolant circulation system, control means comprising oil pressure sensor means and means inhibiting operation of said heater unless said oil pressure sensor means detects a predetermined oil pressure indicating circulation of lubricant in said oil pressure lubrication system.
Claim 2
Dependent Claim
84 words
In combination with a diesel engine having an intake manifold provided with an electrical heater for heating incoming air through said intake manifold and a primer injector for injecting a priming fluid in said intake manifold, said engine having an oil pressure lubrication system and a coolant circulation system, control means comprising oil pressure sensor means and means inhibiting operation of said heater unless said oil pressure sensor means detects a predetermined oil pressure indicating circulation of lubricant in said oil pressure lubrication system.
Claim 3
Dependent Claim
36 words
The control means of claim 1 further comprising coolant temperature sensor means and means enabling operation of said heater below a predetermined temperature of said coolant and inhibiting operation of said heater above said predetermined temperature.
Claim 4
Dependent Claim
20 words
The control means of claim 1 further comprising means inhibiting operation of said primer injector when said heater is activated.
Claim 5
Dependent Claim
20 words
The control means of claim 2 further comprising means inhibiting operation of said primer injector when said heater is activated.
Claim 6
Dependent Claim
21 words
The control means of claim 1 further comprising first delay means inhibiting operation of said heater beyond a predetermined time period.
Claim 7
Dependent Claim
21 words
The control means of claim 2 further comprising first delay means inhibiting operation of said heater beyond a predetermined time period.
Claim 8
Dependent Claim
21 words
The control means of claim 3 further comprising first delay means inhibiting operation of said heater beyond a predetermined time period.
Claim 9
Dependent Claim
21 words
The control means of claim 4 further comprising first delay means inhibiting operation of said heater beyond a predetermined time period.
Claim 10
Dependent Claim
28 words
The control means of claim 1 further comprising delay means inhibiting operation of said primer injector for a predetermined period of time after said heater has been de-energized.
Claim 11
Dependent Claim
28 words
The control means of claim 2 further comprising delay means inhibiting operation of said primer injector for a predetermined period of time after said heater has been de-energized.
Claim 12
Dependent Claim
28 words
The control means of claim 3 further comprising delay means inhibiting operation of said primer injector for a predetermined period of time after said heater has been de-energized.
Claim 13
Dependent Claim
28 words
The control means of claim 4 further comprising delay means inhibiting operation of said primer injector for a predetermined period of time after said heater has been de-energized.
Claim 14
Dependent Claim
28 words
The control means of claim 5 further comprising delay means inhibiting operation of said primer injector for a predetermined period of time after said heater has been de-energized.
Claim 15
Dependent Claim
28 words
The control means of claim 6 further comprising delay means inhibiting operation of said primer injector for a predetermined period of time after said heater has been de-energized.
Claim 16
Dependent Claim
28 words
The control means of claim 7 further comprising delay means inhibiting operation of said primer injector for a predetermined period of time after said heater has been de-energized.
Claim 17
Dependent Claim
28 words
The control means of claim 8 further comprising delay means inhibiting operation of said primer injector for a predetermined period of time after said heater has been de-energized.
Claim 18
Independent Claim
82 words
A method for starting a diesel engine having an intake manifold provided with an electrical heater for heating incoming air through said intake manifold and a primer injector for injecting a priming fluid in said intake manifold, said engine having an oil pressure lubrication system and a coolant circulation system, said method comprising sensing said oil pressure, and inhibiting operation of said heater unless said oil pressure is a predetermined oil pressure indicating circulation of lubricant in said oil pressure lubrication system.
Claim 19
Independent Claim
82 words
A method for starting a diesel engine having an intake manifold provided with an electrical heater for heating incoming air through said intake manifold and a primer injector for injecting a priming fluid in said intake manifold, said engine having an oil pressure lubrication system and a coolant circulation system, said method comprising sensing said oil pressure, and inhibiting operation of said heater unless said oil pressure is a predetermined oil pressure indicating circulation of lubricant in said oil pressure lubrication system.
Claim 20
Dependent Claim
35 words
The method of claim 17 further comprising sensing the temperature of said coolant, enabling operation of said heater below a predetermined temperature of said coolant, and inhibiting operation of said heater above said predetermined temperature.
Claim 21
Dependent Claim
18 words
The method of claim 17 further comprising inhibiting operation of said primer injector when said heater is energized.
Claim 22
Dependent Claim
19 words
The control means of claim 18 further comprising inhibiting operation of said primer injector when said heater is energized.
Claim 23
Dependent Claim
18 words
The control means of claim 17 further comprising stopping operation of said heater beyond a predetermined time period.
Claim 24
Dependent Claim
17 words
The method of claim 18 further comprising stopping operation of said heater beyond a predetermined time period.
Claim 25
Dependent Claim
17 words
The method of claim 19 further comprising stopping operation of said heater beyond a predetermined time period.
Claim 26
Dependent Claim
17 words
The method of claim 20 further comprising stopping operation of said heater beyond a predetermined time period.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |