Method for optimizing an active regeneration of a diesel particulate filter

Patent metadata

Field	Value
Publication number	US-11073060-B2
Application number	US-201615737833-A
Country	US
Kind code	B2
Filing date	Jun 1, 2016
Priority date	Jul 7, 2015
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

A method for optimizing an active regeneration of a diesel particulate filter of a motor vehicle, including the following steps: First, information regarding the planned travel route of the motor vehicle is ascertained; subsequently, a query is made as to whether the remaining travel time is less than the time needed for an upcoming regeneration of the diesel particulate filter, and/or a query is made as to whether the following engine phase of the motor vehicle is an overrun phase; and the active regeneration of the diesel particulate filter is prevented, if the remaining travel time is less than the time needed for an upcoming regeneration of the diesel particulate filter, or if the following engine phase is an overrun phase.

First claim

What is claimed is:

1. A method for optimizing an active regeneration of a diesel particulate filter of a motor vehicle, comprising:
a. ascertaining information regarding a planned travel route of the motor vehicle;
b. determining, based on the ascertained information regarding the planned route, whether a remaining travel time is less than a time needed for an upcoming regeneration of the diesel particulate filter, the remaining travel time being an amount of time remaining for the motor vehicle to complete the planned travel route; and
c. based on the determining, preventing initiation of the active regeneration of the diesel particulate filter when the remaining travel time is less than the time needed for the upcoming regeneration of the diesel particulate filter;
wherein the active regeneration of the diesel particulate filter is initiated, as soon as the active regeneration has been prevented more often than a specifiable number of times.

2. The method as recited in claim 1 , wherein the ascertained information regarding the planned travel route is used to determine sections along the planned travel route which are suitable for carrying out the upcoming regeneration of the diesel particulate filter successfully.

3. The method as recited in claim 1 , wherein the ascertained information regarding the planned travel route is ascertained from a navigation system of the motor vehicle.

4. The method as recited in claim 1 , wherein the ascertained information regarding the planned travel route is ascertained from a cloud.

5. The method as recited in claim 1 , wherein the ascertained information regarding the planned travel route includes at least one of the following: travel time, travel route, average speed of the motor vehicle, average engine speed, engine load, mass flow rate of exhaust gas, temperature profile of exhaust gas, approximate soot loading based on the route traveled and average fuel consumption.

6. The method as recited in claim 1 , further comprising the following steps:
determining whether a following engine phase of the motor vehicle is an overrun phase; and
preventing the initiation of the active regeneration of the diesel particular filter when the following engine phase is the overrun phase;
wherein the overrun phase is a phase of an engine of the motor vehicle in which no more gas is given to the engine but the engine is still coupled.

7. The method as recited in claim 6 , wherein the active regeneration of the diesel particulate filter is initiated as soon as the active regeneration has been prevented, more often than a specified number of times, based on the determining that the remaining travel time is less than the time needed for the upcoming regeneration of the diesel particulate filter and/or based on the determining that the following engine phase of the motor vehicle is the overrun phase.

8. The method as recited in claim 1 , wherein the active regeneration of the diesel particulate filter is initiated as soon as the active regeneration has been prevented, more often than a specified number of times, based on the determining that the remaining travel time is less than the time needed for the upcoming regeneration of the diesel particulate filter.

9. A non-transitory machine-readable storage medium on which is stored a computer program for optimizing an active regeneration of a diesel particulate filter of a motor vehicle, the computer program, when executed by a computer, causing the computer to perform:
a. ascertaining information regarding a planned travel route of the motor vehicle;
b. determining, based on the ascertained information regarding the planned route, whether a remaining travel time is less than a time needed for an upcoming regeneration of the diesel particulate filter, the remaining travel time being an amount of time remaining for the motor vehicle to complete the planned travel route; and
c. based on the determining, preventing initiation of the active regeneration of the diesel particulate filter when the remaining travel time is less than the time needed for the upcoming regeneration of the diesel particulate filter;
wherein the active regeneration of the diesel particulate filter is initiated, as soon as the active regeneration has been prevented more often than a specifiable number of times.

10. The non-transitory machine-readable storage medium as recited in claim 9 , wherein the computer program, when executed by the computer, causing the computer to perform:
determining whether a following engine phase of the motor vehicle is an overrun phase; and
preventing the initiation of the active regeneration of the diesel particular filter when the following engine phase is the overrun phase;
wherein the overrun phase is a phase of an engine of the motor vehicle in which no more gas is given to the engine but the engine is still coupled.

11. An electronic control unit, configured to optimize an active regeneration of a diesel particulate filter of a motor vehicle, the electronic control unit configured to:
a. ascertain information regarding a planned travel route of the motor vehicle;
b. determine, based on the ascertained information regarding the planned route, whether a remaining travel time is less than a time needed for an upcoming regeneration of the diesel particulate filter, the remaining travel time being an amount of time for the motor vehicle to complete the planned travel route; and
c. based on the determination, prevent initiation of the active regeneration of the diesel particulate filter when the remaining travel time is less than the time needed for the upcoming regeneration of the diesel particulate filter;
wherein the active regeneration of the diesel particulate filter is initiated, as soon as the active regeneration has been prevented more often than a specifiable number of times.

12. The electronic control unit as recited in claim 11 , wherein the electronic control unit is further configured to:
determine whether a following engine phase of the motor vehicle is an overrun phase; and
prevent the initiation of the active regeneration of the diesel particular filter when the following engine phase is the overrun phase;
wherein the overrun phase is a phase of an engine of the motor vehicle in which no more gas is given to the engine but the engine is still coupled.

13. A method for optimizing an active regeneration of a diesel particulate filter of a motor vehicle, comprising:
a. ascertaining information regarding a planned travel route of the motor vehicle;
b. determining whether a following engine phase of the motor vehicle is an overrun phase; and
c. based on the determining, preventing initiation of the active regeneration of the diesel particulate filter when the following engine phase is the overrun phase;
wherein the overrun phase is a phase of an engine of the motor vehicle in which no more gas is given to the engine but the engine is still coupled.

14. The method as recited in claim 13 , wherein the active regeneration of the diesel particulate filter is initiated as soon as the active regeneration has been prevented, more often than a specified number of times, based on the determining that the following engine phase of the motor vehicle is the overrun phase.

Assignees

• Bosch Gmbh Robert

Inventors

• Dhanraj Vijay

Classifications

• B01D46/80

  Chemical processes for the removal of the retained particles, e.g. by burning · CPC title

• F01N2900/08

  said parameters being related to the engine · CPC title

• F01N2900/0421

  using an increment counter when a predetermined event occurs · CPC title

• G01C21/26

  specially adapted for navigation in a road network · CPC title

• Y02T10/40

  Engine management systems · CPC title