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<span itemprop="description">A fuel injection pump for internal combustion engines, in particular one-cylinder diesel engines, has a pump piston (1) which can axially slide and rotate in a pump cylinder (13) with at least one fuel suction bore (14), a driving groove (6) arranged on the pump piston (1) parallel to the piston longitudinal...</span><span itemprop="url">http://www.google.com/patents/US6082335?utm_source=gb-gplus-share</span><span class="main-title" itemprop="name">Patent US6082335 - Fuel injection pump for internal combustion engines, in particular one-cylinder diesel engines</span><img itemprop="image" src="http://www.google.com/patents?id=1jADAAAAEBAJ&printsec=frontcover&img=1&zoom=1" alt="Patent US6082335 - Fuel injection pump for internal combustion engines, in particular one-cylinder diesel engines" title="Patent US6082335 - Fuel injection pump for internal combustion engines, in particular one-cylinder diesel engines">
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<span class="gb-survey-link"></span><h1 class="gb-volume-title" dir="ltr">Fuel injection pump for internal combustion engines, in particular one ...</h1> <span class="addmd">Guenter Kampichler et al</span>
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<div id="menu_scroll"><div id="metadata_content" class="menu_content"><div id="metadata_v"><div class="patent_bibdata"><p><b>Patent number</b>: 6082335<br><b>Filing date</b>: Jun 24, 1998<br><b>Issue date</b>: Jul 4, 2000<br></p></div></div></div></div>
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<p class="patent_abstract_text">A fuel injection pump for internal combustion engines, in particular one-cylinder diesel engines, has a pump piston (1) which can axially slide and rotate in a pump cylinder (13) with at least one fuel suction bore (14), a driving groove (6) arranged on the pump piston (1) parallel to the piston longitudinal axis, and geometrical connection between the front side (4) and the outer surface of the pump piston (1). In order to hydrodynamically regulate the optimum injection beginning during start, idle running and highest speed of rotation, a narrow slot (2,7) is provided as geometrical connection.</p>
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<b>Inventors</b>: <a href="http://www.google.com/search?tbo=p&tbm=pts&hl=en&q=ininventor:%22Guenter+Kampichler%22">Guenter Kampichler</a>, <a href="http://www.google.com/search?tbo=p&tbm=pts&hl=en&q=ininventor:%22Theodor+Tovar%22">Theodor Tovar</a><br><b>Original Assignee</b>: <a href="http://www.google.com/search?tbo=p&tbm=pts&hl=en&q=inassignee:%22Motorenfabrik+Hatz+GmbH+%26+Co.+KG.%22">Motorenfabrik Hatz GmbH & Co. KG.</a><br><b>Current U.S. Classification</b>: <a href="http://www.google.com/url?id=1jADAAAAEBAJ&q=http://www.uspto.gov/web/patents/classification/uspc123/defs123.htm&usg=AFQjCNGAq0iHjC_CnWbk4kKVprokJ0UAuA#C123S500000">123/500</a>; <a href="http://www.google.com/url?id=1jADAAAAEBAJ&q=http://www.uspto.gov/web/patents/classification/uspc123/defs123.htm&usg=AFQjCNGAq0iHjC_CnWbk4kKVprokJ0UAuA#C123S300000">123/300</a><br><b>International Classification</b>: F02M 3704<br><br><a href="http://www.google.com/url?id=1jADAAAAEBAJ&q=http://patft.uspto.gov/netacgi/nph-Parser%3FSect2%3DPTO1%26Sect2%3DHITOFF%26p%3D1%26u%3D/netahtml/PTO/search-bool.html%26r%3D1%26f%3DG%26l%3D50%26d%3DPALL%26RefSrch%3Dyes%26Query%3DPN/6082335&usg=AFQjCNGuBMMFwBiyw4d-PiZZB2pxiXs3iw">View patent at USPTO</a><br><a href="http://www.google.com/url?id=1jADAAAAEBAJ&q=http://assignments.uspto.gov/assignments/q%3Fdb%3Dpat%26pat%3D6082335&usg=AFQjCNGSY5MLM0C5yZdR6J1ZsZbmwCe_vA">Search USPTO Assignment Database</a><br>
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<a name="patent_citations_anchor"></a>Citations</h3>
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<td class="rel_patent_header"><b>Cited Patent</b></td>
<td class="rel_patent_header"><b>Filing date</b></td>
<td class="rel_patent_header"><b>Issue date</b></td>
<td class="rel_patent_header"><b>Original Assignee</b></td>
<td class="rel_patent_header rel_patent_title"><b>Title</b></td>
</tr>
<tr>
<td valign="top" nowrap><a href="/patents/US4163634?ie=ISO-8859-1">US4163634</a></td>
<td valign="top" nowrap>Nov 25, 1977</td>
<td valign="top" nowrap>Aug 7, 1979</td>
<td valign="top">Caterpillar Tractor Co.</td>
<td class="rel_patent_title" valign="top">Fuel pump plunger</td>
</tr>
<tr>
<td valign="top" nowrap><a href="/patents/US4881506?ie=ISO-8859-1">US4881506</a></td>
<td valign="top" nowrap>Jun 9, 1988</td>
<td valign="top" nowrap>Nov 21, 1989</td>
<td valign="top">Kloeckner-Humboldt-Deutz AG</td>
<td class="rel_patent_title" valign="top">Injection pump with preinjection</td>
</tr>
<tr>
<td valign="top" nowrap><a href="/patents/US5020979?ie=ISO-8859-1">US5020979</a></td>
<td valign="top" nowrap>Oct 5, 1989</td>
<td valign="top" nowrap>Jun 4, 1991</td>
<td valign="top">Lucas industries PLC</td>
<td class="rel_patent_title" valign="top">Injection pump having pilot and main injection</td>
</tr>
<tr>
<td valign="top" nowrap><a href="/patents/US5097812?ie=ISO-8859-1">US5097812</a></td>
<td valign="top" nowrap>Jul 12, 1990</td>
<td valign="top" nowrap>Mar 24, 1992</td>
<td valign="top">Daimler-Benz AG</td>
<td class="rel_patent_title" valign="top">Sloping-edge-controlled fuel injection pump for internal combustion-engine</td>
</tr>
<tr>
<td valign="top" nowrap><a href="/patents/US5168847?ie=ISO-8859-1">US5168847</a></td>
<td valign="top" nowrap>Mar 4, 1992</td>
<td valign="top" nowrap>Dec 8, 1992</td>
<td valign="top">Robert Bosch GmbH</td>
<td class="rel_patent_title" valign="top">Fuel injection pump for internal combustion engines</td>
</tr>
<tr>
<td valign="top" nowrap><a href="/patents/US5205262?ie=ISO-8859-1">US5205262</a></td>
<td valign="top" nowrap>Sep 19, 1989</td>
<td valign="top" nowrap>Apr 27, 1993</td>
<td valign="top">Robert Bosch GmbH</td>
<td class="rel_patent_title" valign="top">Fuel injection pump for internal combustion engines</td>
</tr>
<tr>
<td valign="top" nowrap><a href="/patents/US5219280?ie=ISO-8859-1">US5219280</a></td>
<td valign="top" nowrap>Aug 26, 1992</td>
<td valign="top" nowrap>Jun 15, 1993</td>
<td valign="top">Zexel Corporation</td>
<td class="rel_patent_title" valign="top">Fuel injection pump plunger</td>
</tr>
<tr>
<td valign="top" nowrap><a href="/patents/US5286178?ie=ISO-8859-1">US5286178</a></td>
<td valign="top" nowrap>Mar 5, 1993</td>
<td valign="top" nowrap>Feb 15, 1994</td>
<td valign="top">Robert Bosch GmbH</td>
<td class="rel_patent_title" valign="top">Fuel injection pump for internal combustion engines</td>
</tr>
<tr>
<td valign="top" nowrap><a href="/patents/US5396871?ie=ISO-8859-1">US5396871</a></td>
<td valign="top" nowrap>Apr 5, 1994</td>
<td valign="top" nowrap>Mar 14, 1995</td>
<td valign="top">Robert Bosch GmbH</td>
<td class="rel_patent_title" valign="top">Fuel injection pump for internal combustion engines</td>
</tr>
<tr>
<td valign="top" nowrap><a href="/patents/US5592915?ie=ISO-8859-1">US5592915</a></td>
<td valign="top" nowrap>Sep 29, 1995</td>
<td valign="top" nowrap>Jan 14, 1997</td>
<td valign="top">Zexel Corporation</td>
<td class="rel_patent_title" valign="top">Pilot injection controller in fuel injection system and method of controlling pilot injection quantity</td>
</tr>
<tr>
<td valign="top" nowrap><a href="/patents/US5647326?ie=ISO-8859-1">US5647326</a></td>
<td valign="top" nowrap>Sep 18, 1995</td>
<td valign="top" nowrap>Jul 15, 1997</td>
<td valign="top">Zexel Corporation</td>
<td class="rel_patent_title" valign="top">Fuel injection pump</td>
</tr>
</table></div></div>
</div>
<div class="vertical_module_list_row">
<h3 class="about_title">
<a name="patent_referenced_by_anchor"></a>Referenced by</h3>
<div id="patent_referenced_by" class="about_content"><div id="patent_referenced_by_v"><table class="rel_patent" style="border-spacing:10px 0" cellpadding="4">
<tr>
<td class="rel_patent_header"><b>Citing Patent</b></td>
<td class="rel_patent_header"><b>Filing date</b></td>
<td class="rel_patent_header"><b>Issue date</b></td>
<td class="rel_patent_header"><b>Original Assignee</b></td>
<td class="rel_patent_header rel_patent_title"><b>Title</b></td>
</tr>
<tr>
<td valign="top" nowrap><a href="/patents/US6799561?ie=ISO-8859-1">US6799561</a></td>
<td valign="top" nowrap>Dec 23, 2002</td>
<td valign="top" nowrap>Oct 5, 2004</td>
<td valign="top">CSXT Intellectual Properties Corporation</td>
<td class="rel_patent_title" valign="top">System and method of optimizing fuel injection timing in locomotive engine</td>
</tr>
<tr>
<td valign="top" nowrap><a href="/patents/US7152585?ie=ISO-8859-1">US7152585</a></td>
<td valign="top" nowrap>Dec 7, 2005</td>
<td valign="top" nowrap>Dec 26, 2006</td>
<td valign="top">Yanmar Co., Ltd.</td>
<td class="rel_patent_title" valign="top">Fuel injection pump with cold start device</td>
</tr>
</table></div></div>
</div>
<div class="vertical_module_list_row">
<h3 class="about_title">
<a name="patent_claims_anchor"></a>Claims</h3>
<div id="patent_claims" class="about_content"><div id="patent_claims_v">
<p>1. A fuel injection-pump for injection in combustion machines with a pump piston (1), which is disposed axially and rotatably movable in a pump cylinder (13) with at least one intake port (14) for fuel and is provided with a runback slot (16), which is in communication with a stop slot (5) for interruption of fuel delivery, mounted on the pump piston (1) parallel to the longitudinal axis of the piston, and with a geometric connection in the region of the circumferential edge between the top end face and the shell surface (3) of the pump piston (1), wherein there is provided, in order to exert a hydrodynamic influence on control of the beginning of injection, a narrow transverse slit (7) spaced from the leading edge (8) and at one end discharging into the stop slot (5) of the pump piston (1), wherein a narrow longitudinal slit (2) running parallel to the pump-piston axis and cut into the circumferential edge is provided, and the narrow transverse slit is disposed between the stop slot (5) and the narrow longitudinal slit (2).</p>
<p>2. A fuel-injection pump according to claim 1, wherein the transverse slit (7) discharges into the longitudinal slit (2).</p>
<p>3. A fuel injections-pump for injection in combustion machines with a pump piston (1), which is disposed axially and rotatable movable in a pump cylinder (13) with at least one intake port (14) for fuel and is provided with a runback slot (16), which is in communication with a stop slot (5) for interruption of fuel delivery mounted on the pump piston (1) parallel to the longitudinal axis of the piston and with a geometric connection in the region of the circumferential edge between the top end face and the shell surface (3) of the pump piston (1), wherein there is provided, in order to exert a hydrodynamic influence on control of the beginning of injection, a narrow transverse slit (7) spaced from the leading edge (8) and at one end discharging into the stop slot (5) of the pump piston (1), wherein a narrow longitudinal slit (2) running parallel to the pump-piston axis and cut into the circumferential edge is provided, and the narrow transverse slit (7) is disposed between the stop slot (5) and the narrow longitudinal slit (2) the radial depth (t) of the longitudinal narrow slit ranges from 5 to 10% of the pump piston diameter (d).</p>
<p>4. A fuel injection-pump for injection in combustion machines with a pump piston (1), which is disposed axially and rotatably movable in a pump cylinder (13) with at least one intake port (14) for fuel and is provided with a runback slot (16), which is in communication with a stop slot (5) for interruption of fuel delivery mounted on the pump piston (1) parallel to the longitudinal axis of the piston and with a geometric connection in the region of the circumferential edge between the top end face and the shell surface (3) of the pump piston (1), wherein there is provided, in order to exert a hydrodynamic influence on control of the beginning of injection, a narrow transverse slit (7) spaced from the leading edge (8) and at one end discharging into the stop slot (5) of the pump piston (1), wherein a narrow longitudinal slit (2) running parallel to the pump-piston axis and cut into the circumferential edge is provided, and the narrow transverse slit (7) is disposed between the stop slot (5) and the narrow longitudinal slit (2), the width (b) of the narrow longitudinal slit ranges from 2% to 6% of the pump piston diameter (d).</p>
<p>5. A fuel injection-pump for injection in combustion machines with a pump piston (1), which is disposed axially and rotatably movable in a pump cylinder (13) with at least one intake port (14) for fuel and is provided with a runback slot (16), which is in communication with a stop slot (5) for interruption of fuel delivery mounted on the pump piston (1) parallel to the longitudinal axis of the piston, and with a geometric connection in the region of the circumferential edge between the top end face and the shell surface (3) of the pump piston (1), wherein there is provided, in order to exert a hydrodynamic influence on control of the beginning of injection, a narrow transverse slit (7) spaced from the leading edge (8) and at one end discharging into the stop slot (5) of the pump piston (1), wherein a narrow longitudinal slit (2) running parallel to the pump-piston axis and cut into the circumferential edge is provided, and the narrow transverse slit (7) is disposed between the stop slot (5) and the narrow longitudinal slit (2), the pump piston (1) has in idling, part-load, and full-load operation respectively, an angular position in which the narrow transverse slit (7) overlaps the intake port (14) during a piston stroke.</p>
<p>6. A fuel injection-pump for injection in combustion machines with a pump piston (1), which is disposed axially and rotatably movable in a pump cylinder (13) with at least one intake port (14) for fuel and is provided with a runback slot (16), which is in communication with a stop slot (5) for interruption of fuel delivery, mounted on the pump piston (1) parallel to the longitudinal axis of the piston, and with a geometric connection in the region of the circumferential edge between the top end face and the shell surface (3) of the pump piston (1), wherein there is provided, in order to exert a hydrodynamic influence on control of the beginning of injection, a narrow transverse slit (7) spaced from the leading edge (8) and at one end discharging into the stop slot (5) of the pump piston (1), wherein a narrow longitudinal slit (2) running parallel to the pump-piston axis and cut into the circumferential edge is provided, and the narrow transverse slit (7) is disposed between the stop slot (5) and the narrow longitudinal slit (2), the pump piston (1) has during starting operation, an angular position in which the narrow longitudinal slit (2) overlaps the intake port (14) during a piston stroke, the axis of the longitudinal slit (2) then passing approximately through the center of the intake port (14).</p>
<p>7. A fuel-injection pump according to claim 1, characterized in that the pump cylinder is constructed in one piece with the timing case.</p>
<p>8. A fuel injection pump according to claim 1, wherein the narrow transverse slit is parallel to the leading edge.</p>
<p>9. A fuel injection pump according to claim 1, wherein the narrow transverse slit is at an angle to the leading edge.</p>
<p>10. A fuel injection pump according to claim 1 wherein the combustion machine is a one-cylinder diesel engine.</p>
<p>11. A fuel injection pump according to claim 3, wherein the radial depth (t) of the narrow longitudinal slit is 8% of the pump piston diameter.</p>
<p>12. A fuel injection pump according to claim 3, wherein the combustion machine is a one-cylinder diesel engine.</p>
<p>13. A fuel injection pump according to claim 4, wherein the width (b) of the narrow longitudinal slit is 4% of the pump piston diameter.</p>
<p>14. A fuel injection pump according to claim 4, wherein the combustion machine is a one-cylinder diesel engine.</p>
<p>15. A fuel injection pump according to claim 5, wherein the combustion machine is a one-cylinder diesel engine.</p>
<p>16. A fuel injection pump according to claim 6, wherein the combustion machine is a one-cylinder diesel engine.</p>
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