Method for operating an internal combustion engine, in particular of a motor vehicle, in engine braking operation

A technology of engine braking and internal combustion engine, applied in engine control, machine/engine, electrical control, etc.

Inactive Publication Date: 2021-02-23
DAIMLER TRUCK AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially when there are few actuators in the air path (e.g. one EGR valve and no wastegate), the following situation occurs, that is, the engine braking torque segment of the three-cylinder brake stage during engine braking operation and the The engine braking torque segments of the full six-cylinder braking stages in dynamic operation do not overlap, so there arises torques that cannot be represented with three or six cylinders

Method used

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  • Method for operating an internal combustion engine, in particular of a motor vehicle, in engine braking operation
  • Method for operating an internal combustion engine, in particular of a motor vehicle, in engine braking operation
  • Method for operating an internal combustion engine, in particular of a motor vehicle, in engine braking operation

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Embodiment Construction

[0022] figure 1 A motor vehicle 11 is shown schematically. Motor vehicle 11 includes a drive train via which drive wheels 14 , not shown in further detail, of motor vehicle 11 are driven. The drive train includes an internal combustion engine 10 . Motor vehicle 11 has internal combustion engine 10 . The internal combustion engine 10 is formed by an internal combustion engine. Furthermore, motor vehicle 11 has a multi-speed transmission 15 . The internal combustion engine 10 has a driven crankshaft which is connected to a transmission input of a multi-speed transmission 15 . The multi-speed transmission 15 is formed by a motor vehicle gearbox. The multi-speed transmission 15 forms part of the drive train of the motor vehicle 11 . The multi-speed transmission 15 is arranged downstream of the internal combustion engine 10 along the drive train, in particular in terms of the power transmission of the drive train. In at least one operating state, the multi-speed transmission...

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Abstract

The invention relates to a method for operating an internal combustion engine (10), in particular of a motor vehicle (11), in engine braking operation, with at least one engine braking mode, and withat least one cylinder of at least one first cylinder bank, wherein the at least one cylinder has at least one outlet valve and at least one inlet valve, wherein, in a first engine braking mode, an outlet lift (12) of all the outlet valves of the at least one cylinder of the first cylinder bank of the internal combustion engine (10) is switched off permanently.

Description

technical field [0001] The invention relates to a method for operating an internal combustion engine, in particular of a motor vehicle, during an engine braking operation, and to a motor vehicle having an internal combustion engine and a control unit for carrying out the method. Background technique [0002] A method is known for operating an internal combustion engine, in particular of a motor vehicle, in engine braking operation, comprising at least one engine braking mode. Usually, the engine brake is switched in groups, for example in the case of a six-cylinder engine, the first, second and third cylinders of the first cylinder bank are collectively switched to engine braking mode, while the fourth cylinder of the second cylinder bank , the fifth and sixth cylinders are jointly switched to the engine braking mode, here, the following possibilities are obtained, that is, the engine braking operation is realized only in the first three cylinders, only in the last three cyl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D13/04
CPCF02D13/04F02D2041/001F02D13/0273F02D13/06F02D13/0215F02B75/22F02D2009/0242F02D13/0207F02D13/0219
Inventor M·O·瓦格纳T·舒马赫尔
Owner DAIMLER TRUCK AG
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