公开(公告)号：US09932935B2

公开(公告)日：2018-04-03

申请号：US14639299

申请日：2015-03-05

Applicant: PRUEFREX ENGINEERING E MOTION GMBH & CO KG

Inventor： Marek Lajda

IPC: F02D41/06 ,  F02M1/02 ,  F02P5/152 ,  F02P5/155 ,  F02P5/06 ,  F02P11/02 ,  F02P1/02 ,  F02P1/08 ,  F02P5/15 ,  F02P11/00 ,  F02D31/00 ,  F02B63/02 ,  F02D41/24 ,  F02N3/02

CPC classification number: F02M1/02 ,  F02B63/02 ,  F02D31/001 ,  F02D41/2422 ,  F02D2200/1012 ,  F02D2400/06 ,  F02N3/02 ,  F02P1/02 ,  F02P1/086 ,  F02P5/06 ,  F02P5/1506 ,  F02P5/1521 ,  F02P5/1555 ,  F02P5/1556 ,  F02P11/00 ,  F02P11/02 ,  Y02T10/46

Abstract: An ignition system of a combustion engine has a start-up adjustment curve with a maximum rotational speed, an operating adjustment curve and a switch-over device for switching between curves. The start-up adjustment curve is selected in the case of a start-up of the combustion engine. A rotational speed curve is divided into adjacent cycles. The start of the first cycle is the point in time of the second ignition after the start-up and the start of the subsequent cycles is in each case the point in time of ignition at which the rotational speed is less than in the case of the subsequent point in time of ignition. The criterion for switching to the operating adjustment curve is whether the average of the rotational speeds of successive cycles differs by less than a first tolerance value.

公开(公告)号：US10920734B2

公开(公告)日：2021-02-16

申请号：US16404081

申请日：2019-05-06

Applicant: PRUEFREX engineering e motion GmbH & Co. KG

Inventor： Jochen Heubeck ,  Marek Lajda

IPC: F02P1/02 ,  F02P3/05 ,  F02P9/00 ,  F02P15/12 ,  F02P3/08 ,  F02D41/20

Abstract: An ignition device for an internal combustion engine with a charging coil, in particular disposed on a yoke core, with a starter wheel to induce a charging voltage in the charging coil by its rotation, with a first energy store which is connected to the charging coil via a rectifier, as well as with an electrical load which for its power supply, in particular during the starting process of the internal combustion engine is connected to a second energy store, wherein the second energy store is connected to the first energy store via a voltage converter. Furthermore, the invention relates to an internal combustion engine with such an ignition device and a method for its operation.

公开(公告)号：US10655593B2

公开(公告)日：2020-05-19

申请号：US16203761

申请日：2018-11-29

Applicant: PRUEFREX Engineering e Motion GmbH & Co. Kg

Inventor： Marek Lajda ,  Jochen Heubeck

IPC: F02P5/15 ,  F02P13/00 ,  F02P5/04 ,  F02P3/04 ,  F02P7/07 ,  F02P7/03

Abstract: An ignition device for an internal combustion engine, having a housing in which a crankshaft sensor is accommodated for detecting the rotational speed and/or the position of a crankshaft, which is in particular provided with a toothed position sensor and in which at least one ignition transformer with a primary winding is accommodated, and a secondary winding for generating a spark for the internal combustion engine is accommodated, wherein a number of input ports, in particular for the connection of an electrical energy source for supplying the or each ignition transformer and/or for supplying sensor and/or control signals, and in which a plurality of output ports, in particular for connecting at least one spark plug and/or for emitting control signals, are provided.

公开(公告)号：US09777693B2

公开(公告)日：2017-10-03

申请号：US14654143

申请日：2013-12-19

Applicant: MAKITA CORPORATION ,  PRUEFREX ENGINEERING E MOTION GMBH & CO. KG

Inventor： Enrico Eichler ,  Harry Radel ,  Thomas Voss ,  Marek Lajda ,  Nikolai Reimgen

IPC: F02P5/04 ,  B25F5/00 ,  F02N11/10 ,  F02P5/15 ,  F02N15/02 ,  F02P1/00

CPC classification number: F02P5/04 ,  B25F5/00 ,  F02N11/10 ,  F02N15/026 ,  F02P1/00 ,  F02P5/1506 ,  F02P5/1508 ,  Y02T10/46

Abstract: The invention relates to a method and a control device for operating an internal combustion engine of a portable work device, said method having the following method steps: a) storing a starting ignition curve for specifying an ignition time after a startup time of the internal combustion engine and an operating ignition curve for specifying the ignition time in a speed range assigned to the nominal operation of the internal combustion engine, b) reading the current engine speed, c) reading at least one time value which indicates the time that has elapsed since a reference time, wherein the reference time can relate to the startup time of the internal combustion engine, and d) determining and/or initiating a switchover process from the starting ignition curve to the operating ignition curve on the basis of the current engine speed and the time value.