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US 6,712,037 B2Granted
Low pressure direct injection engine system
AssigneeVisteon Global Technologies, Inc.
InventorMin Xu
Life of this patent
Estimating the term…
Abstract
A low pressure direct injection engine system for a vehicle includes an engine having a plurality of cylinders each including a piston wherein the cylinders and a top portion of the pistons define a plurality of combustion chambers. A fuel injector is mounted in fluid communication with each of the combustion chambers. Each fuel injector has a nozzle which is adapted to generate a fine fuel spray with droplet sizes of 25 micro-meters SMD and 45 micro-meters DV90 and low penetration at fuel pressure of roughly 2 MPa. A low pressure fuel delivery system is adapted to deliver fuel from a fuel tank within the vehicle to the fuel injectors, and an igniter is mounted within the combustion chamber which is adapted to ignite the fuel within the combustion chamber.
Claims10
A low pressure direct injection engine system for a vehicle comprising
- an engine having a plurality of cylinders, each of said cylinders including a piston wherein said cylinders and a top portion of said pistons define a plurality of combustion chambers;
- a plurality of direct injection fuel injectors, one of said injectors being mounted in fluid communication with each of said combustion chambers and having a nozzle adapted to disperse fuel injected through said nozzle into said combustion chamber at a fuel pressure of roughly 2 MPa;
- a fuel pump adapted to deliver fuel from a fuel tank within the vehicle, through a fuel rail of the vehicle, to said fuel injectors, said fuel pump comprising a rotary fuel pump mounted within the fuel tank of the vehicle and driven by an electric motor;
- an igniter mounted within said combustion chamber adapted to ignite fuel within said combustion chamber;
- and
- a motor controller adapted to control the speed of said electric motor and a sensor mounted within said fuel rail, said sensor adapted to sense the pressure of the fuel within the fuel rail and to send a signal to said motor controller whereby said motor controller controls the speed of said electric motor such that said fuel pump maintains a roughly constant fuel pressure.
3 more elements
A low pressure direct injection engine system for a vehicle comprising
- an engine having a plurality of cylinders, each of said cylinders including a piston wherein said cylinders and a top portion of said pistons define a plurality of combustion chambers;
- a plurality of direct injection fuel injectors, one of said injectors being mounted in fluid communication with each of said combustion chambers and having a nozzle adapted to disperse fuel injected through said nozzle into said combustion chamber with a fuel spray having a fine droplet size of about 25 micro-meters SMD and 45 micro-meters DV90 and low penetration at fuel pressure of roughly 2 MPa;
- a fuel rail adapted supply fuel to each of said fuel injectors;
- a rotary fuel pump mounted within a fuel tank of the vehicle and connected to said fuel rail, said fuel pump being driven by an electric motor and adapted to deliver fuel from a fuel tank within the vehicle to said fuel rail at roughly 2 MPa;
- a regulator mounted on said fuel pump which is adapted to bleed back excessive flow generated by said fuel pump to maintain a roughly constant fuel pressure;
- a motor controller adapted to control the speed of said electric motor and a sensor mounted within said fuel rail, said sensor adapted to sense the pressure of the fuel within the fuel rail and to send a signal to said motor controller whereby said motor controller controls the speed of said electric motor such that said fuel pump maintains a roughly constant fuel pressure;
- an igniter mounted within said combustion chamber adapted to ignite fuel within said combustion chamber.
4 more elements
A low pressure direct injection engine system for a vehicle comprising:
- an engine having a plurality of cylinders, each of said cylinders including a piston wherein said cylinders and a top portion of said pistons define a plurality of combustion chambers;
- a plurality of direct injection fuel injectors, one of said injectors being mounted in fluid communication with each of said combustion chambers and having a nozzle adapted to disperse fuel injected through said nozzle into said combustion chamber with a fuel spray having a fine droplet size of about 25 micro-meters SMD and 45 micro-meters DV90 and low penetration at fuel pressure of less than approximately 5 MPa;
- a fuel rail adapted supply fuel to each of said fuel injectors;
- a rotary fuel pump mounted within a fuel tank of the vehicle and connected to said fuel rail, said fuel pump being driven by an electric motor and adapted to deliver fuel from a fuel tank within the vehicle to said fuel rail at roughly 2 MPa;
- a regulator mounted on said fuel pump which is adapted to bleed back excessive flow generated by said fuel pump to maintain a roughly constant fuel pressure;
- a motor controller adapted to control the speed of said electric motor and a sensor mounted within said fuel rail, said sensor adapted to sense the pressure of the fuel within the fuel rail and to send a signal to said motor controller whereby said motor controller controls the speed of said electric motor such that said fuel pump maintains a roughly constant fuel pressure;
- an igniter mounted within said combustion chamber adapted to ignite fuel within said combustion chamber.
4 more elements
A low pressure direct injection engine system for a vehicle comprising:
- an engine having a plurality of cylinders, each of said cylinders including a piston wherein said cylinders and a top portion of said pistons define a plurality of combustion chambers;
- a plurality of direct injection fuel injectors, one of said injectors being mounted in fluid communication with each of said combustion chambers and having a nozzle adapted to disperse fuel injected through said nozzle into said combustion chamber with a fuel spray having a fine droplet size of about 25 micro-meters SMO and 45 micro-meters DV90 and low penetration at fuel pressure of approximately 2 MPa or less;
- a fuel rail adapted supply fuel to each of said fuel injectors;
- a rotary fuel pump mounted within a fuel tank of the vehicle and connected to said fuel rail, said fuel pump being driven by an electric motor and adapted to deliver fuel from a fuel tank within the vehicle to said fuel rail at roughly 2 MPa;
- a regulator mounted on said fuel pump which is adapted to bleed back excessive flow generated by said fuel pump to maintain a roughly constant fuel pressure;
- a motor controller adapted to control the speed of said electric motor and a sensor mounted within said fuel rail, said sensor adapted to sense the pressure of the fuel within the fuel rail and to send a signal to said motor controller whereby said motor controller controls the speed of said electric motor such that said fuel pump maintains a roughly constant fuel pressure;
- an igniter mounted within said combustion chamber adapted to ignite fuel within said combustion chamber.
4 more elements
Dependencies are inferred from the claim text.