Patent ID: 8459576
Filing Date: 2013-06-11
Classification: F02B,F02D,F02M,Y02T

Abstract:
1. A dual fuel injector comprising: an injector body defining a dual fuel inlet configured to receive high pressure diesel fuel and medium pressure gaseous fuel, a medium pressure gaseous supply passage, a high pressure diesel supply passage, at least one low pressure drain, a diesel check cavity, a gaseous check cavity, at least one diesel nozzle outlet, and at least one gaseous fuel nozzle outlet; a gaseous control valve assembly disposed at least partially within the injector body and having a control valve member that selectively allows fluid communication between the high pressure diesel supply passage and the at least one low pressure drain; a diesel control valve assembly disposed at least partially within the injector body and having a control valve member that selectively allows fluid communication between the high pressure diesel supply passage and the at least one low pressure drain; a diesel check disposed in the diesel check cavity and movable between a first diesel check position wherein the diesel check blocks fluid communication between the high pressure diesel supply passage and the at least one diesel nozzle outlet, and a second diesel check position wherein the diesel check at least partially unblocks fluid communication between the high pressure diesel supply passage and the at least one diesel nozzle outlet, and wherein the movement between the first diesel check position and the second diesel check position is controlled by the diesel control valve assembly; a gaseous check disposed in the gaseous check cavity and movable between a first gaseous check position wherein the gaseous check blocks fluid communication between the medium pressure gaseous supply passage and the at least one gaseous nozzle outlet, and a second gaseous check position wherein the gaseous check at least partially unblocks fluid communication between the medium pressure gaseous supply passage and the at least one gaseous nozzle outlet; a hydraulic lock in fluid communication with both the high pressure diesel supply passage and gaseous check cavity.