Ignition circuit having RPM limitation for an internal combustion engine
The invention is directed to an ignition circuit for a two-stroke engine in a portable handheld work apparatus. A spark plug (2) is connected via a switch (14) to a voltage source (16). The ignition switch (14) is actuated by an electronic control circuit (15) which closes the ignition switch (14) i...
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| creator | GEYER KLAUS SCHIEBER EBERHARD |
| description | The invention is directed to an ignition circuit for a two-stroke engine in a portable handheld work apparatus. A spark plug (2) is connected via a switch (14) to a voltage source (16). The ignition switch (14) is actuated by an electronic control circuit (15) which closes the ignition switch (14) in dependence upon the crankshaft angle and additional operating parameters such as the rpm of the engine (1) in order to trigger an ignition spark per revolution of the crankshaft (10). To limit rpm, the ignition switch (14) is held open when a pregiven end rpm is exceeded in order to suppress an ignition spark over at least one crankshaft revolution. In order to prevent that additional vibrations are excited by the limiting of rpm, the ignition switch (14) is closed after an end rpm is exceeded in accordance with the random principle and in dependence upon the position of the crankshaft (10) in such a manner that an ignition spark, which corresponds to a crankshaft revolution, is triggered in accordance with the random principle. |
| format | Patent |
| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_US2004237933A1</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>US2004237933A1</sourcerecordid><originalsourceid>FETCH-epo_espacenet_US2004237933A13</originalsourceid><addsrcrecordid>eNrjZPDwTM_LLMnMz1NIzixKLs0sUchILMvMS1cICvBVyMnMzSxJBMum5RcpJOYpZOaVpBblJeYoJOfnJpUWg6VS89Iz81J5GFjTEnOKU3mhNDeDsptriLOHbmpBfnxqcUFicmpeakl8aLCRgYGJkbG5pbGxo6ExcaoAdlk1Sw</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>Ignition circuit having RPM limitation for an internal combustion engine</title><source>esp@cenet</source><creator>GEYER KLAUS ; SCHIEBER EBERHARD</creator><creatorcontrib>GEYER KLAUS ; SCHIEBER EBERHARD</creatorcontrib><description>The invention is directed to an ignition circuit for a two-stroke engine in a portable handheld work apparatus. A spark plug (2) is connected via a switch (14) to a voltage source (16). The ignition switch (14) is actuated by an electronic control circuit (15) which closes the ignition switch (14) in dependence upon the crankshaft angle and additional operating parameters such as the rpm of the engine (1) in order to trigger an ignition spark per revolution of the crankshaft (10). To limit rpm, the ignition switch (14) is held open when a pregiven end rpm is exceeded in order to suppress an ignition spark over at least one crankshaft revolution. In order to prevent that additional vibrations are excited by the limiting of rpm, the ignition switch (14) is closed after an end rpm is exceeded in accordance with the random principle and in dependence upon the position of the crankshaft (10) in such a manner that an ignition spark, which corresponds to a crankshaft revolution, is triggered in accordance with the random principle.</description><edition>7</edition><language>eng</language><subject>BLASTING ; COMBUSTION ENGINES ; CONTROLLING COMBUSTION ENGINES ; HEATING ; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS ; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES ; LIGHTING ; MECHANICAL ENGINEERING ; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES ; WEAPONS</subject><creationdate>2004</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20041202&DB=EPODOC&CC=US&NR=2004237933A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76290</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20041202&DB=EPODOC&CC=US&NR=2004237933A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>GEYER KLAUS</creatorcontrib><creatorcontrib>SCHIEBER EBERHARD</creatorcontrib><title>Ignition circuit having RPM limitation for an internal combustion engine</title><description>The invention is directed to an ignition circuit for a two-stroke engine in a portable handheld work apparatus. A spark plug (2) is connected via a switch (14) to a voltage source (16). The ignition switch (14) is actuated by an electronic control circuit (15) which closes the ignition switch (14) in dependence upon the crankshaft angle and additional operating parameters such as the rpm of the engine (1) in order to trigger an ignition spark per revolution of the crankshaft (10). To limit rpm, the ignition switch (14) is held open when a pregiven end rpm is exceeded in order to suppress an ignition spark over at least one crankshaft revolution. In order to prevent that additional vibrations are excited by the limiting of rpm, the ignition switch (14) is closed after an end rpm is exceeded in accordance with the random principle and in dependence upon the position of the crankshaft (10) in such a manner that an ignition spark, which corresponds to a crankshaft revolution, is triggered in accordance with the random principle.</description><subject>BLASTING</subject><subject>COMBUSTION ENGINES</subject><subject>CONTROLLING COMBUSTION ENGINES</subject><subject>HEATING</subject><subject>HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS</subject><subject>IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES</subject><subject>LIGHTING</subject><subject>MECHANICAL ENGINEERING</subject><subject>TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES</subject><subject>WEAPONS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2004</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZPDwTM_LLMnMz1NIzixKLs0sUchILMvMS1cICvBVyMnMzSxJBMum5RcpJOYpZOaVpBblJeYoJOfnJpUWg6VS89Iz81J5GFjTEnOKU3mhNDeDsptriLOHbmpBfnxqcUFicmpeakl8aLCRgYGJkbG5pbGxo6ExcaoAdlk1Sw</recordid><startdate>20041202</startdate><enddate>20041202</enddate><creator>GEYER KLAUS</creator><creator>SCHIEBER EBERHARD</creator><scope>EVB</scope></search><sort><creationdate>20041202</creationdate><title>Ignition circuit having RPM limitation for an internal combustion engine</title><author>GEYER KLAUS ; SCHIEBER EBERHARD</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US2004237933A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2004</creationdate><topic>BLASTING</topic><topic>COMBUSTION ENGINES</topic><topic>CONTROLLING COMBUSTION ENGINES</topic><topic>HEATING</topic><topic>HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS</topic><topic>IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES</topic><topic>LIGHTING</topic><topic>MECHANICAL ENGINEERING</topic><topic>TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES</topic><topic>WEAPONS</topic><toplevel>online_resources</toplevel><creatorcontrib>GEYER KLAUS</creatorcontrib><creatorcontrib>SCHIEBER EBERHARD</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>GEYER KLAUS</au><au>SCHIEBER EBERHARD</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Ignition circuit having RPM limitation for an internal combustion engine</title><date>2004-12-02</date><risdate>2004</risdate><abstract>The invention is directed to an ignition circuit for a two-stroke engine in a portable handheld work apparatus. A spark plug (2) is connected via a switch (14) to a voltage source (16). The ignition switch (14) is actuated by an electronic control circuit (15) which closes the ignition switch (14) in dependence upon the crankshaft angle and additional operating parameters such as the rpm of the engine (1) in order to trigger an ignition spark per revolution of the crankshaft (10). To limit rpm, the ignition switch (14) is held open when a pregiven end rpm is exceeded in order to suppress an ignition spark over at least one crankshaft revolution. In order to prevent that additional vibrations are excited by the limiting of rpm, the ignition switch (14) is closed after an end rpm is exceeded in accordance with the random principle and in dependence upon the position of the crankshaft (10) in such a manner that an ignition spark, which corresponds to a crankshaft revolution, is triggered in accordance with the random principle.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| subjects | BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES LIGHTING MECHANICAL ENGINEERING TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES WEAPONS |
| title | Ignition circuit having RPM limitation for an internal combustion engine |
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