Abstract:
A method to control the rotor position in a reluctance motor includes: energising a phase winding to an energised state so as to move a rotor relative to a stator; switching the phase winding between the energised state and a freewheeling state over a pulsing period to produce a plurality of phase current pulses wherein the phase current freewheels in the freewheeling state over a freewheeling period of each current pulse; sampling rates of change of phase current and amplitudes of phase current during a plurality of freewheeling periods; de-energising the phase winding; and computing the angular position of the rotor.
Abstract:
The present disclosure relates to a heating system for an exhaust gas treatment system. The heating system comprises a first heating element comprising a receiving surface for receiving a reductant fluid and a second heating element, which may surround the first heating element. The second heating element may be a thermochemincal or thermophysical device. In a first mode of operation the second heating element is arranged to receive thermal energy from engine exhaust gas. In second mode of operation the second heating element transfers thermal energy to heat the first heating element.
Abstract:
An emissions cleaning module is provided including a flow conduit having an upstream end fluidly connected to a source of exhaust fluid and a downstream end fluidly connected to a mixer module. The flow conduit includes a bend upstream of the mixer module. An inner side of the bend of the flow conduit includes a funnel portion. The emissions cleaning module provides an improved arrangement for the flow of exhaust fluid.
Abstract:
An emissions cleaning module includes a flow conduit having an upstream end fluidly connected to a source of exhaust fluid and a downstream end fluidly connected to a mixer module. An injector module has an outlet orientated to inject injection fluid into the flow conduit upstream the mixer module. A low pressure cavity downstream the injector module outlet is fluidly connected to the flow conduit or the mixer module by an open mouth orientated such that a flow of exhaust fluid along the flow conduit flows over the open mouth creating a pressure reduction within the low pressure cavity.
Abstract:
An emissions cleaning module is provided including a first conduit containing a diesel oxidation catalyst (DOC) module and a second conduit containing a selective catalytic reduction (SCR) module. A mounting mechanism is provided for mounting the emissions cleaning module to an external support, which may be, for example, a chassis of a vehicle or an engine component. The second conduit is mounted to the mounting mechanism and the first conduit is mounted to the second conduit.
Abstract:
In a machine including an engine having one or more machine functional units powered by an electrical power source 10, an isolator configured to isolate the machine functional unit(s) and a control module from the electrical power source when an operator opens the isolator, there is provided an electrical bypass circuit that may form an electrical connection to couple the electrical power source with the control module and the machine functional unit and bypass the isolator during machine shutdown.
Abstract:
An emissions cleaning module of a combustion engine may be provided with an inlet module for directing incoming gas flow. An inlet module includes an inlet for receiving exhaust gases from the combustion engine; an outlet for directing said exhaust gases into an inlet of the emissions cleaning module; and a flow distributor located in a flow path of the exhaust gases between the inlet and the outlet of the inlet module. The flow distributor includes a plurality of apertures through which the exhaust gases pass. This may lead to improved uniformity of gas flow within a downstream module.
Abstract:
A method of controlling the injection of fuel into cylinders of an internal combustion engine provides a method of distributing injection of fuel among cylinders of the engine so as to inject a quantity of fuel which is reliable and accurate, even when the quantity of fuel for each cylinder is close to the minimum quantity which can reliably and accurately be injected. The method may be applicable to injection of fuel for combustion in the engine or injection of fuel which is timed to be injected so as to pass through the cylinder without combusting.
Abstract:
The engine boosting system includes an engine having an intake manifold, exhaust manifold and exhaust gas recirculation loop fluidly connected therebetween. A boost circuit including a storage vessel is in fluid communication with the intake manifold and with the exhaust manifold. A throttle is located downstream of the exhaust manifold, the exhaust gas recirculation loop, and the boost circuit. A connection between the boost circuit and the intake manifold is independent of a connection between the exhaust gas recirculation loop and the intake manifold.
Abstract:
The present disclosure relates to a mixing pump (10) for combining two or more substances. More specifically, the mixing pump (10) is adapted to combine controlled amounts of those substances so as to produce a mixture containing predetermined proportions of those substances. The mixing pump includes a chamber (23) lying in fluid communication with a first substance inlet (50), a second substance inlet (51) and a mixture outlet (52). The mixing pump (10) also includes a pumping member disposed in the chamber (23) and adapted to draw first and second substances from the first and second substance inlets (50,51) and to expel a mixture of those substances through the mixture outlet (52).