Abstract:
An exhaust flow treatment apparatus to treat exhaust flow emitted by a combustion engine is configured to receive unburnt fuel for combustion therein after confirming that conditions are such that the unburnt fuel is likely to combust in the apparatus. A method of controlling operation of an exhaust flow treatment apparatus includes confirming that the temperature of fluid in the apparatus exceeds a threshold temperature before allowing unburnt fuel into the apparatus. The method may confirm a particular mode of operation of the exhaust flow treatment apparatus to determine the appropriate quantity of fuel for burning in the apparatus.
Abstract:
An emissions cleaning module electronics support unit includes a base member which defines at least one seating location for an electronics module; and a roof member includes a first end joined to the base member and a second end, distal the base member, coupled to a brace or one or more conduits of the emissions cleaning module. The roof member may be shaped to extend up and over the base member so as to create an open-mouthed cavity. The base member may include one or more apertures creating tortuous thermal paths between the attachment member and electronics module seating location.
Abstract:
A speed-determining system in an internal combustion engine is disclosed. The internal combustion engine includes a crankshaft, a camshaft, and an engine control module (ECM). The system includes a first gear that rotates with the crankshaft and a second gear attached to the camshaft. At least one idler gear is operatively meshed with the first gear and the second gear. A fuel pump gear, meshed with the idler gear, is driven proportionally to the first gear and the second gear. The fuel pump gear includes a transversal face, a circumferential lip portion, and a number of notches along the circumferential lip portion. A proximity sensor, in communication with the ECM, is spaced from the second gear. A rotation of the fuel pump gear moves the notches relative to the proximity sensor, triggering the proximity sensor to register movement of the fuel pump gear and calculate at least a camshaft speed.
Abstract:
An emissions cleaning module includes a first and second conduit. The first conduit contains a diesel oxidation catalyst (DOC) module and a diesel particulate filter (DPF) module; the second conduit contains a selective catalytic reduction (SCR) module. The emissions cleaning module is mounted to an external support by means of a mounting mechanism including at least one adjustable strap which is clamped around a conduit; and at least one saddle which is mounted to the conduit by the at least one adjustable strap. The saddle includes a curved upper surface configured to conform substantially to a portion of the conduit.
Abstract:
An emissions cleaning module including a heat shield that comprises a first section and a second section that are coupled together around a flowhood. The heat shield substantially fully envelops all external surfaces of the flowhood.
Abstract:
It may be necessary to eliminate soot from combustion engine emissions in order to comply with regulatory requirements. It may be desirable to avoid the need for a separate aftertreatment apparatus in order to eliminate soot from combustion engine emissions.A compression ignition engine may be configured to result in combustion having a peak value of equivalence ratio of less than 4.0 at the lift off length of the flame. This may result in particulate emissions of fewer than 1012 particles per kWh.
Abstract:
The present disclosure provides a method and apparatus for estimating the amount of ammonia output from an SCR device by determining a NOx conversion efficiency of the SCR device using a variance of a NOx input measurement and a variance of a NOx output measurement, obtaining an estimate of NOx output from the SCR device using the NOx conversion efficiency and using that estimate to determine an estimate of ammonia output from the SCR device.
Abstract:
An exhaust fluid treatment apparatus used to treat exhaust fluid emitted by a combustion engine includes a check of its functionality. A method of monitoring operation of an exhaust fluid treatment apparatus includes comparing a calculated temperature difference with an expected temperature difference associated with combustion of fuel. If the calculated temperature difference is within an acceptable margin of the expected temperature difference, further fuel injection may be permitted. If the calculated temperature difference is outside the acceptable margin of the expected temperature difference, a temperature of the exhaust gas upstream of the exhaust fluid treatment apparatus may be increased.
Abstract:
The disclosure provides an emissions cleaning module for cleaning emissions output from an internal combustion engine. The emissions cleaning module may include a first conduit, a second conduit, a third conduit, a first end coupling and a second end coupling which together provide a continuous fluid path. The first, second and third conduits may be supported at one end by a first support member and at an opposite end by a second support member. The first, second and third conduits may be mutually parallel. The support members, conduits and couplings may be arranged with relative substantial translational movement thereof restricted.
Abstract:
An aftertreatment module includes a conduit defining a flow path and an aperture into the flow path. A shield is arranged at least partway around the conduit and spaced therefrom, the shield including an opening in registration with the aperture. A boss is provided on the conduit, the boss having a through-hole in registration with the aperture. A sensor is disposed within the boss so as to extend at least partway into the flow path. A spacer is arranged around the boss. The sensor extends through the opening, and the shield further includes an inner portion for engagement with the spacer.