U.S. patent application number 11/607724 was filed with the patent office on 2007-06-07 for procedure for the control of a pollutant control equipment.
This patent application is currently assigned to Robert Bosch GMBH. Invention is credited to Oliver Marquardt.
Application Number | 20070125074 11/607724 |
Document ID | / |
Family ID | 38047738 |
Filed Date | 2007-06-07 |
United States Patent
Application |
20070125074 |
Kind Code |
A1 |
Marquardt; Oliver |
June 7, 2007 |
Procedure for the control of a pollutant control equipment
Abstract
It is suggested to use a procedure for the control of the
regeneration of a pollutant control equipment arranged in the
planned internal combustion engine used for powering a motor
vehicle. It will be regenerated in periodical intervals by at least
one stored component and a device for the execution of the process.
A calculation of a route takes place due to an entry by the
operator. A required regeneration of the pollutant control
equipment impacts the calculation of a route. Besides protection
from the pollutant control equipment the invention based procedure
enables a protection against contaminant loads of the air on
specific routes and beyond that an energy efficient regeneration of
the pollutant control equipment.
Inventors: |
Marquardt; Oliver;
(Stuttgart, DE) |
Correspondence
Address: |
MERCHANT & GOULD PC
P.O. BOX 2903
MINNEAPOLIS
MN
55402-0903
US
|
Assignee: |
Robert Bosch GMBH
Stuttgart
DE
|
Family ID: |
38047738 |
Appl. No.: |
11/607724 |
Filed: |
December 1, 2006 |
Current U.S.
Class: |
60/295 ; 60/297;
60/301 |
Current CPC
Class: |
F01N 3/0871 20130101;
F01N 9/00 20130101; F01N 9/002 20130101; F01N 9/007 20130101; F01N
3/023 20130101; Y02T 10/40 20130101 |
Class at
Publication: |
060/295 ;
060/297; 060/301 |
International
Class: |
F01N 3/00 20060101
F01N003/00; F01N 3/10 20060101 F01N003/10 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 5, 2005 |
DE |
10 2005 057 956.6 |
Feb 7, 2006 |
DE |
10 2006 005 505.5 |
Claims
1. A method of controlling a regeneration in an exhaust gas system
of an internal combustion engine with attached pollutant control
equipment for the powering of a motor vehicle, the method
comprising regenerating in periodic intervals by at least one
stored exhaust component and calculating a route based upon a
specification and based on a required regeneration of the pollutant
control equipment.
2. A method according to claim 1, wherein calculating includes
calculating by a stored or calculated evaluation criteria for its
suitability for the regeneration.
3. A method according to claim 1, wherein calculating includes
calculating a route based on a suggested route.
4. A method according to claim 1, wherein calculating a route
includes considering an anticipated drive time, distance topology,
known traffic obstructions, or anticipated fuel use.
5. A method according to claim 1, wherein calculating includes
calculating a route to avoid operating conditions with a marginal
exhaust gas volume flow or a high oxygen content of an exhaust
gas.
6. A method according to claim 1, wherein calculating a route
includes causing a sufficient remaining drive time for an execution
of a regeneration.
7. A method according to claim 1, wherein calculating includes
considering an appearance of an increased contaminant load in an
exhaust gas during regeneration.
8. A method according to claim 1, further comprising determining if
a started regeneration will be retained or cancelled based on
evaluation criteria.
9. A device that controls a regeneration of pollutant control
equipment arranged in an internal combustion engine for powering a
motor vehicle, the device causing regeneration by at least one
stored component by which a calculation of a route is planned due
to a specification that has a planned specifically arranged
internal combustion engine and a specifically arranged driving
computer.
Description
[0001] The invention originates from a procedure for the control of
the regeneration of pollutant control equipment and from a device
for the execution of the procedure according to the type of the
independent requirements.
[0002] In DE 199 06 287 A1 a procedure for the operation of a
particle filter of an internal combustion which is regenerated in
regular intervals is described. The regeneration takes place in
connection with a function for the loading condition of the
particle filter. One of the particle's conditioning systems oxidize
the particles starting at a temperature of about 550.degree. C.
When the ignition temperature is reached an exothermal reaction
will be ignited that will cause a combustion of the particles.
Hereby, the particle filter regenerates within a few minutes. A
high oxygen concentration in the exhaust gas increases the
combustion speed. A reduced exhaust volume flow leads to a
temperature increase and also increases the combustion speed, but
can also lead to local temperature increases. Therefore, a high
material load can occur when the exhaust volume flow is reduced by
an occurring regeneration of the exhaust volume flow, for example,
when a traffic jam is reached or when a destination has been
reached, and the internal combustion engine is shut off. High
material load can also occur when in addition a high oxygen portion
ocurs in the exhaust like e.g. in the idling cycle of the internal
combustion engine by an overrun fuel cut off. High temperatures can
lead to damage of the particle filter.
[0003] DE 197 39 848 A1 describes different operation procedures of
an internal combustion engine in whose exhaust area a NOx-memory
catalyst is arranged. Due to the final memory capacity of the
NOx-memory catalyst, an in between regeneration of the NOx memory
catalyst must be planned, which occurrs through a supply of
hydrocarbons and/or carbon monoxide, which for instance can be
produced internally in the motor. An undesired sulfur reposition in
the NOx memory catalyst can be removed by an operation of the
memory catalyst by high temperatures with a fatty exhaust gas. For
instance, a respective procedure is described in DE 198 43 859
A1.
[0004] An increase of the exhaust gas temperature for the
introduction of the pollutant control equipment's regeneration can
be maintained through an oxidation of combustible exhaust
components. A catalytic active surface can, e.g., be contained in
the particle filter. In a catalyst, e,g. a (NOx)-memory catalyst a
catalystic active surface principle is already present.
[0005] From EP 1 222 377 B1 a procedure has become known by which a
navigation device that contains a driving computer impacts the
regeneration of a memory catalyst as an example for a pollutant
control equipment. A control device that impacts the regeneration
is connected to a navigation device, which at least knows the data
about the current location of the motor vehicle and the route of
the motor vehicle. With the control device, the regeneration of the
memory catalyst dependant on the location and the route will be
impacted whereby the cleaning of the memory catalyst will be
prematurely executed when the route expects that a later cleaning
is not possible. It is also possible, that a regeneration on the
route has to occur in a route area that is unsuited for a
regeneration and can cause an increased material load of the memory
catalyst or an imperfect regeneration.
[0006] The invention's task is to provide a procedure that creates
the most favorable conditions for regeneration.
[0007] In each case the task is solved through the indicated
characteristics listed in the independent conditions.
[0008] The invention based approach for the control of the
regeneration of a specified internal combustion engine for powering
a vehicle in the exhaust tract that provides in periodical
intervals that at least one stored exhaust component will be
regenerated arranges that the route of the power vehicle will be
impacted.
[0009] The invention based procedure intervenes in the calculation
of a specified route by an operator. At the least, the destination
will be specified. The driving computer of the operator operated
navigation device can impact the route in terms of a required
regeneration of the pollutant control equipment. Thereby, a better
regeneration is possible. For instance, through the impact of the
route a route section with low exhaust gas volume flow and/or high
oxygen content can be rerouted as, e.g., by the in city operation
or by the coasting mode. As already mentioned at the start, a low
exhaust volume flow and a high oxygen content can lead to
temperature increases at least by local temperature and damage the
pollutant control equipment. In addition, through impacting of the
route a possibly present traffic jam can be avoided whereby also a
low exhaust volume flow and a high exhaust oxygen content can be
expected.
[0010] The additional cost for the realization of the invention
based procedure is comparably low because many power vehicles
already have a navigation system that contains a driving computer
with a routing.
[0011] Advantageous advanced training and designs of the invention
based procedure result from dependent conditions.
[0012] Design provides that the route will be impacted by lodged or
calculated evaluation criteria for its suitability for a
regeneration. With this method at least one preferably several
routes in terms of the regeneration will be evaluated whereby the
most suited route can be found.
[0013] The invention based procedure reaches for a specification of
the desired route of which at least the destination is specified
and by a required regeneration of the polluttant control equipment.
Hereby, if necessary the operator of the navigation device can be
included. An interaction with the operator does not take place.
However, another design provides that the calculated route will be
suggested. With this method an entry by an operator that agrees
with the suggestion or declines it is required. As an evaluation
criteria for the route the anticipated driving time and/or the
distance topology and/or the anticipated fuel use can be
considered. The evaluation criteria set up on a present navigation
device, which after the entry of the desired route, are already
available and/or can be reloaded from a data carrier or a radio
communication. An interaction with the operator does not take
place. In contrast, another design provides that the calculated
route will be proposed. With this method an entry from an operator
is necessary that agrees to the proposal or declines it.
[0014] As evaluation criteria by the analysis of the route
especially the estimated driving length and/or the known distance
topology and/or the estimated gas use can be included. The
evaluation criteria start with available information in the
navigation device, which after entering the desired route, is
already available in the navigation device or can be reloaded by a
data carrier through radio communication.
[0015] When an evaluation criteria, according to which a route is
evaluated as suited for a regeneration the avoidance of operating
conditions, can be based on low exhaust volume flow, the safety of
the pollutant control during the regeneration can be placed in the
foreground.
[0016] In this case distances with a long coasting mode like valley
departures are avoided and distances with a sufficient portion of a
highway or freeway are preferred. Another design provides that
evaluation criteria by which a route is presumed to be suited will
be based on a a sufficient remaining driving length. In addition or
alternatively it can be decided on the basis of planned or
calculated decision criteria if an already started regeneration
will be retained or cancelled. With these methods an energy
efficient execution of the regeneration of the pollutant control
equipment can be placed in the foreground. In this case, a drive on
a highway or freeway is preferred by which an increased load can be
expected for a longer time period. Thereby an increased exhaust
temperature occurrs so that if necessary heating methods to heat
the pollution control equipment can require an energy input.
[0017] Another design provides that the evaluation criteria
according to which a route is evaluated as suited for a
regeneration and/or the time period or the location of the start of
the regeneration on this route is designated is based upon the
appearance of an increased pollution impact in the exhaust during
the regeneration. Thereby, an optimized regeneration of the
pollutant control equipment in terms of the exhaust emissions can
be placed in the foreground. Thereby, for instance tunnels,
residential areas, or certain protected areas like e.g. health
resort zones can be avoided.
[0018] If during a drive, current impacts like, e.g., a traffic jam
report or a request for the cancellation of a drive require the
cancellation of the regeneration then this can be achieved while
the driving computer cancels the started regeneration.
[0019] The invention based device for the control of the
regeneration of a provided internal combustion engine arranged in
the exhaust tract of an internal combustion engine attached
pollutant control equipment provided for activating a power vehicle
which in periodical intervals is regenerated by at least one stored
exhaust component by which a calculation of the vehicles route is
planned based upon a specification and provides a special created
internal combustion engine control for an execution of the
procedure and a specifically created driving computer.
[0020] Additional advantegeous advanced training and designs of the
invention based procedure arise from additional dependent demands
and from the following description.
[0021] FIG. 1 shows a schematic representation of an internal
combustion engine with a pollutant control equipment.
[0022] FIG. 1 shows a schematic view of an internal combustion
engine 30 with a pollutant control equipment 35 and an internal
combustion control 10, which controls the operation parameter of
the internal combustion engine 30.
[0023] The internal combustion engine 30 is supplied with
combustion air through an air supply duct 31.
[0024] If necessary, the fuel metering may be carried out
individually for each cylinder by means of injection nozzles 32,
one of them being depicted symbolically. Thereby, the amount of
fuel will be set by the motor control 10.
[0025] The exhaust from the internal combustion engine 30 will be
supplied by a pollutant control equipment 35 over an exhaust tract
33 unto which a recycling of the exhaust gases can also be attached
and which, e.g., contains a (NOx-) memory catalyst and/or a
particle filter. The particle filter can contain an integrated
catalyst, which on the one hand can provide the cleaning of the
exhaust gas and on the other hand can support an exo-thermal
reaction of combustible exhaust gas components for the heating of
the particle filter.
[0026] The oxygen content of the exhaust gas can be measured with
an exhaust probe 34 and can be conveyed to the internal combustion
engine control 10.
[0027] In connection with a concrete design of the pollutant
control equipment 35, a regeneration of the pollutant control
equipment 35 may be required. For example, this may be the case by
a design as a memory catalyst and/or particle filter. The
regeneration can be managed through additional injecting of fuel
with injection pumps 32 or with other methods on the one hand to
increase the exhaust gas temperature and on the other for the
supply of a possibly necessary reagent agent.
[0028] To define the requirements for a regeneration and for the
control of the operation parameter of the internal combustion
engine 30 during the regeneration in the internal combustion engine
10, a regeneration control 11 is planned. According to the status
of the technology this gives, e.g., based upon the evaluation of
the pressure decrease a signal to the internal combustion engine
control 10 to signal that a regeneration of the pollutant control
equipment 35 is required, especially when the pollutant control
equipment 35 contains a particle filter.
[0029] After the start of the regeneration certain operation
conditions, which could damage the pollutant control equipment 35
should be avoided. For instance, by highly loaded particle filters
during the transition into the coasting mode in admissibly high
temperatures can occur in the pollutant control equipment 35 due to
a high oxygen content.
[0030] At first, the regeneration control 11 reports the
requirement of a regeneration to a driving computer 20 as it is
e.g. used by routing in navigation systems.
[0031] Invention based an impact of the calculated route due to the
required regeneration of the pollutant control equipment 35 is
planned.
[0032] The driving computer 20 contains an evaluation level 21,
which the planned route can evaluate if it seems to be suited for a
regeneration. If this is the case, this route is selected. If it is
not the case, a new route can be calculated. The driving computer
20 can set the route without the intervention of an operator. A
design plans that the route of an operator's route will be
suggested with a driving computers 20 connected input and output
unit 22. The operator can accept the route, abandon, or decline it.
If the operator offers a changed route it can be evaluated by the
evaluation level 21 and if necessary be accepted. If this route is
not suited the driving computer can calculate an additional route,
evaluate it in the evaluation level 21 and suggest it. If the
evaluation level has detected that the planned route is suited, a
signal for the start of a regeneration of the pollutant control
equipment 35 can be given through the driving computer 20.
[0033] The driving computer 20 can calculate the route with stored
or calculated evaluation criteria for its suitability for a
regeneration process. For example, the evaluation criteria is
planning using the expected drive duration and/or the distance
topology and/or the known traffic obstructions and/or the
anticipated fuel.
[0034] Alternatively, or additionally, as evaluation criteria,
according to which a route is evaluated as suited for a
regeneration process, be the avoidance of operating conditions with
little exhaust volume flow and/or a high oxygen can be planned.
After a route is evaluated, as suited for a regeneration process,
there can be planned alternatively, or additionally, a sufficient
remaining driving time for the execution of a regeneration.
[0035] If the driving computer 20 determines through a user input
with the input and output unit 22 from a changed route or through
information from traffic reports, that the continuing route does
not appear suited for the conclusion of the regeneration cycle,
then the driving computer 20 can release a signal for the
cancellation of the internal combustion engine 10.
[0036] Therefore, the invention based procedure enables, through an
impact of the calculated route in the driving computer 20 in
connection with a required regeneration of the pollutant control
equipment 35, protection of the pollutant control equipment 35, a
protection against a pollution impact of the air on specific
routes, and an energy efficient regeneration of the pollutant
control equipment 35.
* * * * *