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A method and apparatus for injecting a gaseous fuel into a combustion chamber of an internal combustion engine (ICE) cylinder employs a combination of operating modes. First, one of a low load and a high load mode of operation is selected during the operation of the ICE. Low load and high load modes

A method and apparatus for injecting a gaseous fuel into a combustion chamber of an internal combustion engine (ICE) cylinder employs a combination of operating modes. First, one of a low load and a high load mode of operation is selected during the operation of the ICE. Low load and high load modes are distinguished by the combustion characteristics of an amount of fumigated fuel added to the combustion chamber. Fumigated fuel that supports combustion will cause high load to be selected. Fumigated fuel that does not support combustion will cause low load to be selected. A directly injected amount of fuel is provided under low load. Under high load, a directly injected quantity of fuel is added when the piston is near top dead center to allow the engine to meet load requirement above that provided by the fumigated fuel. Under low load, two additional operating regions can be selected, namely, a low speed low load operating mode and a high speed low load operating mode distinguished by a pre-defined engine speed. Under low load low speed mode, fumigated fuel is barred from the combustion chamber. Under high speed low load, the amount of fumigated fuel is determined at a lower end by a pre-defined leakage flow rate. Combustion of either of the directly injected and the fumigated fuel can be initiated by a pilot fuel, which is generally injected directly into the combustion chamber when the piston is near top dead center prior to a power stroke. However, a quantity of pilot fuel can be introduced earlier in the compression stroke or in the intake stroke under high load conditions.

대표청구항 ▼

A method and apparatus for injecting a gaseous fuel into a combustion chamber of an internal combustion engine (ICE) cylinder employs a combination of operating modes. First, one of a low load and a high load mode of operation is selected during the operation of the ICE. Low load and high load modes

A method and apparatus for injecting a gaseous fuel into a combustion chamber of an internal combustion engine (ICE) cylinder employs a combination of operating modes. First, one of a low load and a high load mode of operation is selected during the operation of the ICE. Low load and high load modes are distinguished by the combustion characteristics of an amount of fumigated fuel added to the combustion chamber. Fumigated fuel that supports combustion will cause high load to be selected. Fumigated fuel that does not support combustion will cause low load to be selected. A directly injected amount of fuel is provided under low load. Under high load, a directly injected quantity of fuel is added when the piston is near top dead center to allow the engine to meet load requirement above that provided by the fumigated fuel. Under low load, two additional operating regions can be selected, namely, a low speed low load operating mode and a high speed low load operating mode distinguished by a pre-defined engine speed. Under low load low speed mode, fumigated fuel is barred from the combustion chamber. Under high speed low load, the amount of fumigated fuel is determined at a lower end by a pre-defined leakage flow rate. Combustion of either of the directly injected and the fumigated fuel can be initiated by a pilot fuel, which is generally injected directly into the combustion chamber when the piston is near top dead center prior to a power stroke. However, a quantity of pilot fuel can be introduced earlier in the compression stroke or in the intake stroke under high load conditions. per garment of claim 1 wherein the two strap sections encircle the neck of the animal and rejoin into a single strap that connects to the top section of the absorbent garment. 6. The pet diaper garment of claim 1 wherein the single strap section is attached to entire width of the front section. 7. The pet diaper garment of claim 1 wherein the bib strap section is detachable from the absorbent garment. 8. A pet diaper garment comprising: an absorbent garment encircling an animal's torso, the absorbent garment having a back section, a front section, and stretchable side sections which join to form a top section, the back section including perforations effective for allowing a user to locate and create a tail opening; and a bib strap which is separable into two strap sections, the bib strap including a single strap section attached to an entire width of the front section of the absorbent garment, the single strap section including perforations that allow the bib strap to be separated into two strap sections, the bib strap extending around the front of the animal and connecting with a top section of the absorbent garment. 9. The pet diaper garment of claim 8 wherein the absorbent garment includes an elastic waist band effective for further securing the garment to the animal. 10. The pet diaper garment of claim 8 wherein the absorbent garment includes stretchable side sections which join to form the top section, wherein the side sections may be separated to allow placement of the absorbent garment onto the animal. 11. The pet diaper garment of claim 8 wherein the bib strap separates into two strap sections which are effective for encircling a neck of the animal. 12. The pet diaper garment of claim 8 wherein the two strap sections encircle the neck of the animal and rejoin into a single strap that connects to the top section of the absorbent garment. 13. The pet diaper garment of 12 further comprising a connector effective for securing and adjusting the single straps. 14. The pet diaper garment of claim 8 wherein the bib strap section is detachable from the absorbent garment.