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Method and apparatus for simulating torque efficiency of an internal combustion engine with multiple injections of fuel in one combustion stroke

A technology of multiple injection and combustion strokes, applied in fuel injection control, combustion engines, internal combustion piston engines, etc., can solve the problems of insufficient torque accuracy of internal combustion engines, and achieve the effect of accurate simulation

Active Publication Date: 2016-11-02
ROBERT BOSCH GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in order to adequately simulate the torque efficiency of the internal combustion engine, the torque efficiency of the internal combustion engine determined by means of these different angles is not accurate enough to bring the torque efficiency into close agreement with the measured value

Method used

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  • Method and apparatus for simulating torque efficiency of an internal combustion engine with multiple injections of fuel in one combustion stroke
  • Method and apparatus for simulating torque efficiency of an internal combustion engine with multiple injections of fuel in one combustion stroke

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Embodiment Construction

[0016] figure 1 A schematic diagram of an internal combustion engine 1 , which is controlled by a control unit 2 , is shown. Internal combustion engine 1 consists of four cylinders 3 , 4 , 5 , 6 which are interconnected via an intake manifold 7 . Each cylinder 3, 4, 5, 6 has a connecting rod 3a, 4a, 5a, 6a connected to a crankshaft 9 and a fuel injection valve 10, in figure 1 Only one of these fuel injection valves is shown as an example. Furthermore, connected to the suction line 7 is an air supply line 11 in which a throttle valve 8 is arranged.

[0017] Here the crankshaft 9 and the injection valve 10 are electrically connected with the throttle valve 8 and the control device, and the control device will adjust the air input amount through the throttle valve 8 according to the position of the crankshaft 9 and adjust the pair of cylinders 3, 4, 5 through the injection valve 10, 6 fuel input.

[0018] The explosive combustion of the fuel injected into the internal combust...

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Abstract

The invention relates to a method for modeling a torque efficiency of an internal combustion engine for fuel multi-injection in a combustion cycle, in which the torque efficiency of each individual injection of the fuel multi-injection is determined depending on a first angle (101) of a crankshaft (9) of the internal combustion engine during the individual injection and a second angle (102) of the crankshaft (9) of the internal combustion engine during the same individual injection. For improved accuracy in the modeling of the torque efficiency, a weighted average (106) is formed of the first angle (101) of a crankshaft (9) during the individual injection and the second angle (102) of the crankshaft (9) during the same individual injection, wherein the weighted averages (106) of the individual injections forming the fuel multi-injection during the combustion cycle are supplied to an estimation (110) of the torque efficiency.

Description

technical field [0001] The invention relates to a method for the simulation of the torque efficiency of an internal combustion engine with multiple injections of fuel in one combustion stroke, in which method as a function of a first angle of the crankshaft of the internal combustion engine during a single injection and the crankshaft of the internal combustion engine during the same single injection A second angle for determining the torque efficiency of each individual injection of the multiple fuel injections, the invention also relates to a device for carrying out the method. Background technique [0002] It is now common practice to inject into the internal combustion engine the amount of fuel required for the operation of the internal combustion engine. In order to be able to have a targeted influence on the total heat released in the cylinder by fuel combustion during the combustion process, the injection is performed as a multi-injection, wherein the individual injec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/40F02D41/14F02P5/15
CPCF02D41/1497F02D41/402F02D2041/1433F02D2200/1004F02P5/15Y02T10/40
Inventor F·奥图什J-P·布龙纳S·韦格纳S·戈特利布
Owner ROBERT BOSCH GMBH
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