EP1074706A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Temperature control method for a direct injection engine
Assignee: Ford Global Technologies LLC
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Filing: 2000-07-27
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Granted: —
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Expires: 2020-07-27
Abstract
Abstract A fuel vapour purging method controls fuel vapour purging during stratified operation. Several factors influence vapour purge control, including fuel vapour concentration in the cylinder and temperature of the emission control device. The fuel vapour passes through the cylinder unburned by maintaining the concentration within allowable limits. The unburned fuel vapour reacts exothermically in the emission control device (70,72) thereby generating heat. To guarantee that the fuel vapour reacts in the first emission control device (70), the fuel vapour purge is restricted to a certain temperature range. To guarantee that the fuel vapour does not burn in the cylinder, the concentration is kept to a restricted value.
Inventors
- 👤 James Michael Kerns
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 14:00
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/30; F02D41/3011; F02D41/3017; F02D41/3023; F02B; F02B23/00; F02B23/08; F02B23/10; F02B23/104; F02D41/0025; F02D41/003; F02D41/0032; F02D41/0035; F02D41/02; F02D41/021; F02D41/0235; F02D41/024; F02D41/025; F02B17/00; F02B17/005; F02B75/00; F02B75/12; F02B2075/125; F02D41/027; F02D41/0275; F02D41/028; F02M; F02M25/00; F02M25/08; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
74 words
A method for generating heat in an emission control
device (70,72) coupled to an engine (10) having multiple
combustion chambers (30), the method comprising: operating in a stratified mode where fuel is injected
during a compression stroke of the engine; purging fuel vapours into the combustion chambers (30)
that will pass through the chambers unburned, thereby
providing unburned hydrocarbons and excess oxygen to react
exothermically and generate heat in the emission control
device (70,72).
Claim 2
Dependent Claim
27 words
A method as claimed in Claim 1, wherein said fuel
vapour purging is performed during an engine start to
rapidly increase temperature of the emission control device.
Claim 3
Dependent Claim
26 words
A method as claimed in Claim 1, wherein said
purging is performed when a temperature of the emission
control device is less than a predetermined value.
Claim 4
Dependent Claim
25 words
A method as claimed in Claim 1, wherein said
purging is performed when a temperature of the emission
control device is within a predetermined range.
Claim 5
Dependent Claim
20 words
A method as claimed in Claim 4, wherein said
predetermined range represents a temperature range where
exothermic reactions are possible.
Claim 6
Dependent Claim
20 words
A method as claimed in Claim 5, wherein said
temperature range is based on the emission control device
washcoat materials.
Claim 7
Dependent Claim
23 words
A method as claimed in Claim 1, wherein said fuel
vapour purging is performed to increase temperature and
desulphate the emission control device.
Claim 8
Dependent Claim
78 words
A control method for an engine having multiple
combustion chambers coupled to an emission control device,
the method comprising the steps of: operating in a stratified mode where fuel is injected
during a compression stroke of the engine; providing an indication of temperature of the emission
control device; and purging fuel vapours into the combustion chambers when
said temperature is below a predetermined threshold, thereby
providing unburned hydrocarbons and excess oxygen to react
exothermically and increase said temperature.
Claim 9
Dependent Claim
31 words
A method as claimed in Claim 8 further comprising
the step of adjusting an amount of said purged fuel vapours
based on said temperature and a desired emission control
device temperature.
Claim 10
Dependent Claim
38 words
A method as claimed in Claim 8, wherein said
purging step further comprises purging fuel vapours into the
combustion chambers when said temperature is above a
preselected threshold, with said preselected threshold is
less than said predetermined threshold.
References Cited (Backward Citations)
No citation records indexed.
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