# US 11,898,510 B1 · Filter regeneration control device

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- Number: US 11,898,510 B1
- Document ID: US11898510B1
- Status: Granted
- Kind: B1
- Application number: 18/325,116
- Filed: 2023-05-30
- Published: 2024-02-01
- Granted: 2024-02-13
- Earliest claimed: 2022-07-27
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Junji Hyodoh; Masanao Idogawa; Machiko Takahashi
- Web page: https://patentgrep.com/patent/US11898510B1

## CPC

- F02D 41/029: {the exhaust gas treating apparatus being a particulate filter}
- F01N 3/0253: {adding fuel to exhaust gases}
- F01N 9/002: {of filter regeneration}
- F02D 41/0087: {Selective cylinder activation, i.e. partial cylinder operation (deceleration cut-off F02D41/123)}
- F02D 41/08: for idling (F02D41/06, F02D41/16 take precedence)
- F02D 41/086: {taking into account the temperature of the engine}
- F01N 2430/02: by cutting out a part of engine cylinders
- F01N 2430/06: by varying fuel-air ratio, e.g. by enriching fuel-air mixture
- F01N 2590/11: for hybrid vehicles
- F01N 2900/08: said parameters being related to the engine
- F02D 37/02: one of the functions being ignition
- F02D 2200/0812: Particle filter loading
- F02D 2200/101: Engine speed
- F02D 2200/501: Vehicle speed
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)

## Abstract

A filter regeneration control device includes a fuel supply controller configured to stop, when there is a forced regeneration request for burning particulate matter collected in a filter provided in an exhaust passage of an engine that is a traveling power source of a vehicle while the vehicle is stopped, fuel supply to at least one of a plurality of cylinders of the engine while supplying fuel to the cylinder other than the at least one cylinder, and a rotation speed controller configured to control a rotation speed of the engine when the forced regeneration request is issued to be higher than a rotation speed when the forced regeneration request is not issued and during an idle operation of the engine while the vehicle is stopped.

## Claims

### Claim 1

A filter regeneration control device for a particulate filter provided in an exhaust passage of a vehicle equipped with a traveling power source including an engine with a plurality of cylinders, the filter regeneration control device comprising:
a fuel supply controller configured to control fuel supply to the plurality of cylinders; and
a rotation speed controller configured to control a rotation speed of the engine,
wherein, when a forced regeneration request for burning particulate matter collected in the filter is received while the vehicle is stopped and the engine is in an idle operation, the filter regeneration control device executes a filter regeneration control in which:
the fuel supply controller stops the fuel supply to at least one cylinder of the plurality of cylinders while supplying fuel to remaining cylinders of the plurality of cylinders, and
the rotation speed controller increases the rotation speed of the engine so as to be greater than a normal idle rotation speed of the idle operation.

### Claim 2 (depends on 1)

The filter regeneration control device according to claim 1, wherein:
the vehicle is a hybrid electric vehicle;
the traveling power source further includes an electric motor; and
when the electric motor is in a regenerative operation during the filter regeneration control, the rotation speed controller increases the rotation speed of the engine so as to be greater than a normal regenerative rotation speed of the regenerative operation.

### Claim 3 (depends on 2)

The filter regeneration control device according to claim 2, further comprising an ignition timing controller configured to control an ignition timing of the plurality of cylinders,
wherein, during the filter regeneration control, the ignition timing controller maintains an ignition timing of the remaining cylinders to be equal to a normal ignition timing of the idle operation.