Abstract:
An exhaust gas recirculation (EGR) valve is positioned within an EGR passage fluidly connecting an engine exhaust stream and an engine intake stream, while a waste heat recovery (WHR) system is used to recover heat from the EGR stream. An engine control unit (ECU) is coupled to various sensors and valves to divert working fluid in the WHR system from cooling the EGR exhaust flow below a level which favors production of condensation in the engine intake system. The ECU operates a three-way valveto divert working fluid flow away from the EGR boiler when sensors indicate characteristics of either the exhaust flow or the intake stream which might lead to heavy condensation.
Abstract:
Fuel nozzle for an internal combustion engine comprises a guide plate, a nozzle body, and an injector needle. The guide plate further has a high pressure fuel passage disposed a first radial distance from the center opening at the proximal end and a second radial distance from the center opening at the distal end. Nozzle body has a distal end and proximal end. The proximal end having a recess formed therein adapted to receive at least a portion of the distal end of the guide plate which may be formed by press fitting. Nozzle body has a center opening formed therethrough. Nozzle body has a fuel receiving region disposed proximate the enlarged portion that is in fluid communication with the enlarged portion of the second center opening. The injector needle is disposed within the first center opening of the guide plate and second center opening of the nozzle body.
Abstract:
A method (10) for injecting ammonia (NH3) into exhaust gas upstream of a catalyst of an aftertreatment system includes the steps of determining whether a regeneration event is imminent (14) on the basis of predetermined parameters, and determining whether dosing parameters are met (22). The method (10) further includes the steps of calculating an amount of NH3 to fill the catalyst (18) and adjusting a quantity of NH3 dosed (22) before the regeneration event occurs.
Abstract:
A high pressure hydraulic fitting (300) includes a body (302) having a central passage (322), a channel (304), a threaded section (314), and an extension section (310), wherein the threaded section (314) is disposed between the channel (304) and the extension section (314), and wherein the central passage (322) fluidly connects a first distal end (303) with a second distal end (316) of the body (302). A first o-ring (306) is in the channel (304). A locking nut (324) is engaged to the body (302). The locking nut (324) has an internal threaded section (326) that is arranged to mate with the threaded section (314) on the body (302).
Abstract:
A turbocharger (107) for an internal combustion engine (100) includes a turbine having a divided turbine housing (109). A first inlet port (113) may be connected to a first volute that is formed in the turbine housing (109), and a second inlet port (114) connected to a second volute that is formed in the turbine housing (109). A center housing may be connected to the turbine housing (109), and a compressor (111) may be connected to the center housing. An exhaust gas valve (137) is in fluid communication with the first inlet port (113) and arranged to at least partially constrict a flow of exhaust gas from entering the first inlet port (113) of the turbine (109), but not constrict the flow of exhaust gas from entering the second inlet port (114).
Abstract:
A method of controlling a variable geometry turbocharger (502) includes the steps of determining an engine start of operation (402), initiating a timer (408), and commanding an open position (412) for the vanes of the variable geometry turbocharger (502). The open position (412) may be maintained for a predetermined time (t ), after which, normal operation may resume (406).
Abstract:
A motor vehicle engine (10) has a glow plug system (14) for aiding combustion of fuel in combustion chambers of the engine when the engine is cold and an ignition switch (16) is operated to crank the engine. A first circuit signals the cold start aid to commence operation of the cold start aid in anticipation of engine starting. A second circuit indicates a fault in the cold start aid. A third circuit, that includes a warning signal device (38), activates the warning signal device to inform a driver of the vehicle of the indicated fault upon the first circuit having signaled the cold start aid to commence operation and the second circuit having indicated a fault in the cold start aid.
Abstract:
An ergonomic hoist (100) includes a lift assembly (111) riding on a support (105). A load support assembly (127) is connected to the lift assembly (111) through a lift arm (121). An operator panel (145) is connected to the support assembly (127) through a support arm (137). The operator panel (145) is maintained at substantially the same height when the support assembly (127) moves, including movement in a vertical direction.
Abstract:
An internal combustion engine (10) has a control system (24) for processing various data to develop data for control of various aspects of engine operation, including controlling a device, such as an EGR valve (22) or turbocharger (16). A transient compensation strategy develops a multiplier data value for transient compensation of a control data value for controlling the device by multiplying that control data value by that multiplier data value. The transient compensation strategy comprises a map (34, 40) containing data values for the multiplier, each of which is correlated with both a particular data value for engine speed within a range of data values for engine speed (N) and a particular data value for accelerator pedal rate (APS d) within a range of data values for accelerator pedal rate. The strategy selects one of the multiplier data values from the map on the basis of a data value for engine speed and of a data value for accelerator pedal rate and then multiplies the control data value for controlling the device by the one selected multiplier data value.
Abstract:
A compression ignition engine (60) has a control system (66) for processing data, one or more combustion chambers (62), and fuel injectors (64) for injecting fuel into the chambers. In a first embodiment, the control system controls fueling by processing engine speed and load, to select one of three fueling modes (HCCI+RVT, HCCI+VVT, and CD+RVT) for operating the engine. In a second embodiment, one of four modes (HCCI+RVT, HCCI+IVC, HCCI+IVC+EVC, and CD+RVT) is selected. The invention extends the range for using HCCI combustion.