Method and device for operating an internal combustion engine

Patent metadata

Field	Value
Publication number	US-12140094-B2
Application number	US-202418593408-A
Country	US
Kind code	B2
Filing date	Mar 1, 2024
Priority date	Mar 16, 2023
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

A method and a device for operating an internal combustion engine including a first air duct for supplying air to a cylinder and a second air duct for supplying air to a heater for heating an exhaust system. The first and second air ducts each have a control element for controlling the amount of air flowing through them and a mass flow sensor for measuring the amount of air flowing through them. The first and second air ducts are connected to a common air filter, for providing filtered ambient air of the internal combustion engine. A regulation of the amount of air flowing through the first and second air ducts takes place using the measurement signals, depending on operating states of the internal combustion engine. A mutual influence of the air flowing through the first or second air duct is taken into account.

First claim

What is claimed is:

1. A method for operating an internal combustion engine which includes a first air duct for supplying air to a cylinder of the internal combustion engine and a second air duct for supplying air to a heater for heating an exhaust system of the internal combustion engine, the first and second air ducts each having at least one control element configured to control an amount of air flowing through them and a respective mass flow sensor configured to measure the amount of air flowing through them, a measuring function assigns an amount of air flowing through the first and second air duct to respective measurement signals of the respective mass flow sensor, the first and second air ducts being connected to a common air filter, for providing filtered ambient air of the internal combustion engine, the method comprising:
regulating the amount of air flowing through the first and second air ducts takes place using the measurement signal of the respective mass flow sensors, depending on operating states of the internal combustion engine, and mutual influence of the air flowing through the first or second air duct is taken into account.

2. The method according to claim 1 , wherein air flows only through the second air duct for a first operating mode of the internal combustion engine, air flows through the first and second air ducts for a second operating mode of the internal combustion engine, and air flows only through the first air duct for a third operating mode of the internal combustion engine.

3. The method according to claim 2 , wherein, for the regulation of the amount of air flowing through the first air duct, different measuring functions are used for the second operating mode and third operating mode of the internal combustion engine, and for the regulation of the amount of air flowing through the second air duct, the same measuring functions are used for the first operating mode and second operating mode of the internal combustion engine.

4. The method according to claim 2 , wherein for the regulation of the amount of air flowing through the first air duct, the same measuring functions are used for the second operating mode and third operating mode of the internal combustion engine, and for the regulation of the amount of air flowing through the second air duct, different measuring functions are used for the first operating mode and second operating mode of the internal combustion engine.

5. The method according to claim 2 , wherein, for the regulation of the amount of air flowing through the first air duct, different measuring functions are used for the second operating mode and third operating mode of the internal combustion engine, and for the regulation of the amount of air flowing through the second air duct, different measuring functions are used for the first operating mode and second operating mode of the internal combustion engine.

6. A device configured to operate an internal combustion engine including a first air duct for supplying air to a cylinder of the internal combustion engine and a second air duct for supplying air to a heater for heating an exhaust system of the internal combustion engine, the first and second air ducts each having at least one control element configured to control an amount of air flowing through them and a respective mass flow sensor configured for measuring the amount of air flowing through them, the first and second air ducts being connected to a common air filter, for providing filtered ambient air of the internal combustion engine, the device comprising:
an arrangement configured to regulate the amount of air flowing through the first and second air ducts using the measured signals of the respective mass flow sensors, depending on operating states of the internal combustion engine, and, in doing so, to take into account a mutual influence of the air flowing through the first or second air duct.

7. An air system configured to supply air to an internal combustion engine, comprising:
a first air duct for supplying air to a cylinder of the internal combustion engine; and
a second air duct configured to supply air to a heater for heating an exhaust system of the internal combustion engine, the first and second air ducts each having at least one control element for controlling the amount of air flowing through them and a respective mass flow sensor for measuring the amount of air flowing through them, the first and second air ducts being connected to a common air filter, for providing filtered ambient air of the internal combustion engine, wherein an arrangement of the connection of the first and second air ducts to the air filter is selected such that a mutual influence of the air flowing through the first or second air duct is minimized.

8. The air system according to claim 7 , wherein the first and second air ducts have longitudinal extents, and the first and second air ducts are connected to the air filter in parallel with one another with their longitudinal extents.

Assignees

• Bosch Gmbh Robert

Inventors

• Disch Christian
• Bubeck Conrad
• Bauer Stefan

Classifications

• F02M35/10262

  Flow guides, obstructions, deflectors or the like (for generating a charge motion in the cylinder F02B31/00; for re-atomising condensed fuel or homogenising fuel-air mixture F02M29/00) · CPC title

• F02M35/04

  specially arranged with respect to engine {, to intake system or specially adapted to vehicle}; Mounting thereon {; Combinations with other devices (combined with silencers F02M35/14)} · CPC title

• F01N3/303 Primary

  Filtering additional air · CPC title

• F02D2200/04

  Engine intake system parameters · CPC title

• F02M35/10209

  Fluid connections to the air intake system; their arrangement of pipes, valves or the like · CPC title