Abstract:
A pumping element (900) for pressurizing a fluid within a fluid pump (100) has a fuel pump housing (904) disposed around the pumping element (900). A plunger (908) reciprocates within a bore (906) defined in a barrel (122), which define a pressurization chamber (910) into which fluid is pressurized. A flow (409) path is defined between the plunger (908) and the bore (906). The flow (409) path permitting fluid to pass from the pressurization chamber (910) during pressurization of fluid. A collection chamber formed between the plunger (908) and the bore (906) is disposed adjacent to the bore (906). At least one weep opening defined in the barrel (122) is fluidly connected to the collection chamber, and n annular reservoir (306) defined between the barrel (122) and the fuel pump housing (904) is disposed to receive fluid via the at least one weep opening.
Abstract:
Mixing a pumped fluid with a lubrication fluid within a pump can undermine the lubricity of the lubrication fluid. In order to reduce mixing of fluids within a pump of the present disclosure, a pump is provided that comprises a housing, a piston, a first annulus, and a second annulus. The housing includes an inlet for the pumped fluid, an inlet for the lubrication fluid provided at a first pressure, and a piston bore fluidly coupled to the inlet for the pumped fluid. The piston is moveable within the piston bore. The first annulus is fluidly coupled to the inlet for the lubrication fluid. The second annulus is configured to be fluidly coupled to a drain circuit provided at a second pressure less than the first pressure. The first annulus and the second annulus are located along the length of the piston bore.
Abstract:
A pressure relief valve (20) includes a valve body (22) defining an inlet (44) configured to receive fluid from a fluid system (10), a pressure control orifice (46) ending in a valve seat (50), and a guideway (52) extending from the valve seat. The pressure relief valve further includes a valve closing member (66) configured to abut the valve seat in a closed position and to be displaced from the valve seat in an open position, thereby releasing pressure from the fluid system. The pressure relief valve also includes a flow member (68) including a stem (70) and a flow plate (74). The stem is operably associated with the valve closing member and is configured to reciprocate within the guideway. The pressure relief valve further includes a valve spring (78) operably associated with the valve body.
Abstract:
A fuel system (12) includes a plurality of fuel injectors (30) each defining a nozzle supply passage (48), a nozzle outlet (50) and a low pressure space (54). The fuel system (12) includes a plurality of mechanically actuated pressure intensifiers (70) each including a tappet (32) and being positioned partially within one of the fuel injectors (30), and a common rail (44) fluidly connecting with each of the fuel injectors (30). Each of the fuel injectors (30) further includes an injection pressure control mechanism (80) having an injection pressure control valve (82). Each injection pressure control valve (82) blocks the corresponding pressure intensifier (70) from the common rail (44) and fluidly connects the pressure intensifier (80) with the low pressure space (54) at a first position, and fluidly connects the pressure intensifier (80) with the common rail (44) and blocks the pressure intensifier (70) from the low pressure space (54) at a second position. Injecting fuel via operating the fuel system (12) may include operating the fuel system(12) in a low leakage mode where the pressure intensifier (70) displaces fuel at a low pressure, between high pressure injections.
Abstract:
A fuel system (12) for an engine (10) is disclosed. The fuel system includes a common rail (34), and a cylinder head (20) having a first bore (46) and a second bore (52) intersecting the first bore. A fuel injector (32) is coupled to the cylinder head and at least partially received within the first bore. The fuel system also includes a one-piece hollow tube (48), extending linearly from the common rail to the fuel injector through the second bore. The one-piece hollow tube is configured to communicate high pressure fuel from the common rail to the fuel injector.
Abstract:
In one aspect, the present disclosure is directed to a tappet assembly (22) for a machine. The assembly (22) may include a tappet body (24), a pin (26) fixedly mounted in the tappet body (22), and a substantially cylindrical roller (28) mounted about the pin (26). The roller (28) may have a substantially cylindrical outer surface (30) with a circumferential dimension and a width dimension, the width dimension being defined by two lateral edges (31). The roller (26) may be configured to provide rolling contact between the outer surface (30) of the roller (28) and a cam lobe (20). The outer surface (30) of the roller (28) may be crowned such that at maximum operational loading conditions of the machine a footprint of contact pressure from the cam lobe (20) is spread substantially the full width of outer cylindrical surface (30) of the roller (28).
Abstract:
La présente invention élimine les désavantages du solénoïde hélicoïdal de l'art antérieur en proposant un agencement unique d'un enroulement de bobine et une construction de noyau modulaire qui non seulement permettent un assemblage rapide et économique de solénoïde de diverses dimensions produisant des forces d'intensité différente mais éliminent la tendance de l'induit à tourner par rapport au noyau. Le solénoïde à réponse rapide (10) comprend un premier et un second organe magnétisables (12, 14) montés de manière télescopique avec un mouvement axial rotatif. Le premier organe interne (12) comprend un nombre sélectionnable de sections modulaires identiques individuelles (16) qui définissent d'une manière collective une pluralité de fentes circulaires espacées longitudinalement (18). Le second organe externe (14) est formé en deux moitiés (14a, 14b) et comprend une pluralité de projections en forme d'anneaux espacées longitudinalement (20) qui s'étendent respectivement dans les fentes (18). On fait tourner certaines de ces sections (16) de 180o pendant l'assemblage de manière à générer des flux de courants dirigés en sens opposés dans les portions d'enroulement (38) des sections adjacentes (16).
Abstract:
A fuel system (12) includes a plurality of fuel injectors (30) each defining a nozzle supply passage (48), a nozzle outlet (50) and a low pressure space (54). The fuel system (12) includes a plurality of mechanically actuated pressure intensifiers (70) each including a tappet (32) and being positioned partially within one of the fuel injectors (30), and a common rail (44) fluidly connecting with each of the fuel injectors (30). Each of the fuel injectors (30) further includes an injection pressure control mechanism (80) having an injection pressure control valve (82). Each injection pressure control valve (82) blocks the corresponding pressure intensifier (70) from the common rail (44) and fluidly connects the pressure intensifier (80) with the low pressure space (54) at a first position, and fluidly connects the pressure intensifier (80) with the common rail (44) and blocks the pressure intensifier (70) from the low pressure space (54) at a second position. Injecting fuel via operating the fuel system (12) may include operating the fuel system(12) in a low leakage mode where the pressure intensifier (70) displaces fuel at a low pressure, between high pressure injections.
Abstract:
A metallic fuel system component (14, 50) includes an internal surface (52, 90) and an external surface (54, 92). The metallic fuel system component (14, 50) is made by inducing compressive residual stress in only a portion of the internal surface (52, 90) of the metallic fuel system (10) component by transmitting a laser shock wave (146) through the metallic fuel system (10) component from the external surface (54, 92) to the internal surface (52, 90).
Abstract:
A fluid injector (42) for an exhaust treatment device (40) is disclosed. The fluid injector may have a housing (70) at least partially forming a fluid chamber (98). The housing may have a central axis (90), and a fluid passageway (80) configured to supply fluid to the fluid chamber. The supply of fluid may be in a tangential direction relative to the central axis.