Surface ignition mechanism for diesel engines
First Claim
1. A method of combusting fuel, comprising:
- providing a glow-plug within a combustion chamber having a volume including a piston bowl;
wherein said glow plug provides a localized heated region;
providing air into said combustion chamber;
compressing said air;
providing a mass of fuel into said combustion chamber;
directing in an indirect manner an amount of said mass of fuel by impingement of the fuel against one or more surfaces of said piston bowl to deflect the fuel towards a localized heated region of the glow plug, said glow plug region having a temperature T1, wherein the equivalence ratio of said fuel in said heated region achieves a value such that T1 provides auto-ignition, and igniting all or a portion of said mass of fuel directed towards said heated region of said glow plug; and
igniting the remainder of said fuel at an auto-ignition temperature, wherein, for said combustion chamber, directing an amount of said mass of fuel towards a localized heated region by a direct fuel spray to said localized heated region of said glow plug provides a first time t1 for fuel vaporization and mixing, and said impingement of said fuel against one or more piston bowl surfaces provides a second time t2 for fuel vaporization and mixing, where t2 is at least twice t1.
2 Assignments
0 Petitions
Accused Products
Abstract
The present disclosure relates to combusting fuel during cold start. A glow-plug may be provided within a combustion chamber having a volume including a piston, wherein the glow plug may provide a localized heated region. Air may then be provided into the chamber and compressed. A mass of fuel may also be provided into the combustion chamber, wherein an amount of the fuel mass may be directed towards the localized heated region of the glow plug, wherein the heated region of the glow plug may have a temperature T1, and the equivalence ratio of the fuel in the heated region achieves a value that the temperature T1 provides auto-ignition. All or a portion of the mass of fuel directed towards the heated region of said glow plug may be ignited, and then the remainder of the fuel may be ignited by auto-ignition and/or flame propagation.
21 Citations
23 Claims
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1. A method of combusting fuel, comprising:
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providing a glow-plug within a combustion chamber having a volume including a piston bowl;
wherein said glow plug provides a localized heated region;providing air into said combustion chamber; compressing said air; providing a mass of fuel into said combustion chamber; directing in an indirect manner an amount of said mass of fuel by impingement of the fuel against one or more surfaces of said piston bowl to deflect the fuel towards a localized heated region of the glow plug, said glow plug region having a temperature T1, wherein the equivalence ratio of said fuel in said heated region achieves a value such that T1 provides auto-ignition, and igniting all or a portion of said mass of fuel directed towards said heated region of said glow plug; and igniting the remainder of said fuel at an auto-ignition temperature, wherein, for said combustion chamber, directing an amount of said mass of fuel towards a localized heated region by a direct fuel spray to said localized heated region of said glow plug provides a first time t1 for fuel vaporization and mixing, and said impingement of said fuel against one or more piston bowl surfaces provides a second time t2 for fuel vaporization and mixing, where t2 is at least twice t1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An engine, comprising:
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a combustion chamber having a volume and including a piston bowl and a cylinder; an air intake port configured to direct air into said combustion chamber; a fuel injector configured to inject a mass of fuel into said combustion chamber; and a glow plug including a resistive heating element provided in said combustion chamber, configured to provide a localized region of heating, wherein said air intake port and/or said piston bowl are configured to indirectly direct an amount of said mass of fuel by impingement of the fuel against one or more surfaces of said bowl to deflect the fuel towards said localized region, wherein said localized region of heating is configured to ignite a portion of said fuel and wherein, for said combustion chamber, directing an amount of said mass of fuel towards a localized heated region by a direct fuel spray to said localized heated region of said glow plug provides a first time t1 for fuel vaporization and mixing, and said impingement of said fuel against one or more piston bowl surfaces provides a second time t2 for fuel vaporization and mixing, where t2 is at least twice t1. - View Dependent Claims (19, 20, 21)
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22. A system for cold-start of a diesel engine comprising:
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an engine control unit; a temperature sensor in communication with said control unit and configured to detect one of; (i) a temperature of an environment surrounding said engine;
or(ii) a temperature of engine coolant; a combustion chamber having a volume and including a piston bowl and a cylinder; an air intake port configured to direct air into said combustion chamber; a fuel injector configured to inject a mass of fuel into said combustion chamber; and a glow plug including a resistive heating element provided in said combustion chamber, configured to provide a localized region of heating, wherein said air intake port and/or said piston are configured to indirectly direct an amount of said mass of fuel by impingement of the fuel against one or more surfaces of said piston bowl to deflect the fuel towards said localized region wherein said localized region of heating is configured to ignite a portion of said fuel; wherein said engine control unit is configured to activate said glow plug based upon said detected temperature and wherein, for said combustion chamber, directing an amount of said mass of fuel towards a localized heated region by a direct fuel spray to said localized heated region of said glow plug provides a first time t1 for fuel vaporization and mixing, and said impingement of said fuel against one or more piston bowl surfaces provides a second time t2 for fuel vaporization and mixing, where t2 is at least twice t1. - View Dependent Claims (23)
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Specification