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Method for determining the current cylinder stroke of a piston engine

A piston engine, engine technology, applied in the field of cylinder stroke, can solve the problems of fuel injection, exhaust gas emission increase, etc.

Inactive Publication Date: 2020-02-18
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fuel must not be injected into the cylinders of an internal combustion engine until the cylinder position and cylinder stroke have been acquired, since otherwise there is a risk of combustion stopping and a corresponding increase in exhaust emissions

Method used

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  • Method for determining the current cylinder stroke of a piston engine
  • Method for determining the current cylinder stroke of a piston engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] exist figure 1 An internal combustion engine designed as a piston engine 100 with a fuel injection system 200 is schematically shown in FIG.

[0038] Internal combustion engine 100 has a crankshaft 110 . The crankshaft 110 is connected to a piston 112 in a cylinder 113 via a connecting rod 111 . exist figure 1 Only two cylinders 113 are shown schematically in FIG. 2 , but internal combustion engine 100 can have a suitable number of cylinders 113 .

[0039] A crankshaft sensor wheel 116 is connected to the crankshaft 110 in a rotationally fixed manner. The crankshaft sensor wheel 116 has markings 117 on its surface. Crankshaft pick-up wheel 116 can have, for example, 58 teeth and a gap of the size of two teeth as markings.

[0040] Crankshaft pickup wheel sensor 118 scans the surface of crankshaft pickup wheel 116 and generates an electrical crankshaft signal there. Controller 300 evaluates this signal and determines therefrom the crankshaft angle as the angle of r...

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PUM

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Abstract

The invention relates to a method for determining the current stroke of a cylinder (113) of a piston engine (100) having a crankshaft (110) and a camshaft (120), wherein fuel is delivered to the pistons. In the fuel pipeline (230) of the engine (100), fuel can be injected into the cylinder (113) from the fuel pipeline, and the pressure curve of the fuel pressure in the fuel pipeline (230) is detected ( 420), the crankshaft sensing wheel sensor (118) detects the rotation of the crankshaft (100) and generates a crankshaft signal, and uses the pressure curve (420) of the fuel in the fuel line (230) and the crankshaft signal The center counter pushes out the current stroke of the cylinder (113).

Description

technical field [0001] The invention relates to a method for determining the current cylinder stroke of a piston engine. Background technique [0002] When starting a stationary piston engine (hereinafter also referred to as an internal combustion engine), the cylinder piston positions of the individual cylinders of the internal combustion engine must be determined. The cylinder piston position of the cylinder is determined here as a function of the crankshaft angle. The crankshaft angle indicates the current angle of rotation of the crankshaft of the internal combustion engine relative to a reference position at the top dead center (OT) of the cylinder defined as cylinder 1 . From the number of cylinders and their firing order, the current cylinder piston positions of the other cylinders are derived on the basis of their fixed and known offset relationship to each other. The position of the cylinder piston is known from the crankshaft angle. However, it is not known in w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/02
CPCF02D41/009F02D2041/0092F02D2200/0602G01M15/046
Inventor A.沙贝尔
Owner ROBERT BOSCH GMBH