Inventor · disambiguated record
Koji Hiraya
Also filed as: HIRAYA KOJI
29 granted patents·885 citations·filing 1999–2009
97Inventor score
Top patents by PatentIndex Score
29 records- 0198US6386177B2System and method for auto-ignition of gasoline internal combustion engineNISSAN MOTOR·Filed 2001·Granted May 14, 2002·124 cites·22 claims
- 0296US7073480B2Exhaust emission control apparatus and method for internal combustion engineNISSAN MOTOR·Filed 2005·Granted Jul 11, 2006·51 cites·21 claims
- 0396US6267097B1Compression self-igniting gasoline engineNISSAN MOTOR·Filed 2000·Granted Jul 31, 2001·119 cites·15 claims
- 0494US6425367B1Compression self-ignition gasoline internal combustion engineNISSAN MOTOR·Filed 2000·Granted Jul 30, 2002·62 cites·20 claims
- 0593US6138639AIn-cylinder direct-injection spark-ignition engineNISSAN MOTOR·Filed 1999·Granted Oct 31, 2000·131 cites·11 claims
- 0691US6659068B2Feedback control for auto-ignition two-stage combustion of gasoline in engine cylinderNISSAN MOTOR·Filed 2001·Granted Dec 9, 2003·63 cites·27 claims
- 0790US6612294B2Auto-ignition of gasoline engine by varying exhaust gas retaining durationNISSAN MOTOR·Filed 2001·Granted Sep 2, 2003·42 cites·20 claims
- 0888US6932175B2Control apparatus for hybrid vehicleNISSAN MOTOR·Filed 2003·Granted Aug 23, 2005·48 cites·19 claims
- 0986US7334547B2Variable expansion-ratio engineNISSAN MOTOR·Filed 2007·Granted Feb 26, 2008·15 cites·14 claims
- 1084US6622689B2Method and system for controlling auto-ignition in an internal combustion engineNISSAN MOTOR·Filed 2002·Granted Sep 23, 2003·26 cites·16 claims
- 1182US7334573B2NOx emission reduction apparatusNISSAN MOTOR·Filed 2007·Granted Feb 26, 2008·16 cites·20 claims
- 1278US6814046B1Direct fuel injection engineNISSAN MOTOR·Filed 2004·Granted Nov 9, 2004·21 cites·23 claims
- 1378US6636797B2Enhanced multiple injection for auto-ignition in internal combustion enginesNISSAN MOTOR·Filed 2001·Granted Oct 21, 2003·35 cites·18 claims
- 1477US6912989B2Fuel injection control device for a direct fuel injection engineNISSAN MOTOR·Filed 2004·Granted Jul 5, 2005·21 cites·28 claims
- 1575US8100097B2Multi-link engineTAKAHASHI NAOKI·Filed 2008·Granted Jan 24, 2012·6 cites·8 claims
- 1675US7234437B2Direct-injection internal combustion engine and combustion method thereforNISSAN MOTOR·Filed 2006·Granted Jun 26, 2007·9 cites·13 claims
- 1774US6832594B2Direct fuel injection engineNISSAN MOTOR·Filed 2002·Granted Dec 21, 2004·15 cites·10 claims
- 1869US8627789B2Control apparatus for a cylinder direct-injection internal combustion engineHIRAYA KOJI·Filed 2009·Granted Jan 14, 2014·8 cites·20 claims
- 1969US6739309B2Direct fuel injection internal combustion engineNISSAN MOTOR·Filed 2003·Granted May 25, 2004·22 cites·35 claims
- 2068US7980207B2Multi-link engineNISSAN MOTOR·Filed 2008·Granted Jul 19, 2011·4 cites·7 claims
- 2163US7188589B2Direct injection internal combustion engineNISSAN MOTOR·Filed 2005·Granted Mar 13, 2007·6 cites·7 claims
- 2260US8100098B2Multi-link engineTAKAHASHI NAOKI·Filed 2008·Granted Jan 24, 2012·2 cites·11 claims
- 2355US7475675B2In-cylinder direct fuel-injection engineNISSAN MOTOR·Filed 2006·Granted Jan 13, 2009·2 cites·14 claims
- 2454US7104247B2Direct fuel injection engineNISSAN MOTOR·Filed 2004·Granted Sep 12, 2006·5 cites·9 claims
- 2554US6672276B2Direct fuel injection engineNISSAN MOTOR·Filed 2002·Granted Jan 6, 2004·11 cites·17 claims
- 2653US7028662B2Direct fuel injection engineNISSAN MOTOR·Filed 2004·Granted Apr 18, 2006·6 cites·15 claims
- 2753US6976469B2Direct fuel injection type internal combustion engineNISSAN MOTOR·Filed 2004·Granted Dec 20, 2005·6 cites·14 claims
- 2846US7086378B2Direct fuel injection internal combustion engineNISSAN MOTOR·Filed 2004·Granted Aug 8, 2006·3 cites·16 claims
- 2945US6851408B2Direct fuel injection engineNISSAN MOTOR·Filed 2003·Granted Feb 8, 2005·6 cites·16 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →