Abstract: Provided are embodiments for a sensor apparatus for measuring emissions, including: an extraction member in fluid communication with the exhaust gas flow, the extraction member having an inlet end and an outlet end, the inlet end receiving an exhaust gas sample from the exhaust gas flow; an ammonia capture media positioned downstream of the inlet end within the extraction member, the ammonia capture media comprising a sorbent configured to remove ammonia from the exhaust gas sample; and a post-capture sensor positioned downstream of the ammonia capture media, the post-capture sensor configured to measure at least one downstream NOx concentration measurement in the exhaust gas sample of the exhaust gas flow. Further provided are associated systems and methods for measuring emissions.

Abstract: Provided are embodiments for apparatuses, systems and methods for reducing emissions in an exhaust gas flow of an engine, the apparatus comprising: a reactor vessel positioned externally from the exhaust gas flow, the reactor vessel comprising an inlet and an outlet, the outlet in communication with the exhaust gas flow; an injector positioned within the reactor vessel, the injector receiving a reductant flow from the inlet of the reactor vessel and combining the reductant flow with a pressurized gas flow to generate a reductant spray; and an ammonia generation means within the reactor vessel, the ammonia generation means generating a gaseous reductant flow from the injected reductant flow, the gaseous reductant flow transmitted into the exhaust gas flow via the outlet of the reactor vessel.

Abstract: Provided are systems and methods for pre-heating an emission reduction device including an upstream element and a selective catalytic reduction (SCR) device, the system comprising: an air blower; a heater unit in fluid communication with the air blower; a valve in fluid communication with the heater unit, the valve comprising an input, a first outlet and a second outlet; a controller connected to the air blower, the heater unit, and the valve, the controller providing a control signal to each of the air blower, the heater unit and the valve; and wherein the upstream element receives a first heating airflow from the first outlet and the SCR device receives a second heating airflow from the second outlet.

Abstract: A multi-functional exhaust system for diesel and natural gas engines includes a rectangular box housing, a selective catalytic reduction (SCR) unit, at least one reductant injector, a plurality of sensors, and a mixing duct to mix the injected reductant and the exhaust gas. A portion of the mixing duct runs in parallel beside the SCR unit reducing the overall length of the housing. Another portion of the mixing duct routes the exhaust gas through a 180 degree bend to redirect the exhaust gas to the SCR unit. The SCR unit and mixing duct are positioned within the housing and in fluid communication with an inlet and an outlet of the housing. The inlet is in fluid communication with an engine, and the outlet is in fluid communication with an exhaust outlet so that the housing can be secured as the exhaust system.

Abstract: An active control system for diesel particulate filter includes a particulate filter unit, at least one sensor, a control unit, and a bypass unit. The sensor is in fluid communication with the particulate filter unit and electrically connected with the control unit so that the sensor is able to communicate with the control unit regarding the pressure and temperature readings of the exhaust gas flow. The bypass unit is in fluid communication with the particulate filter unit while a control valve of the bypass unit is electrically connected with the control unit. The control unit is able to operate the control valve depending upon the pressure and temperature readings of the sensor so that the bypass unit can be activated for the exhaust gas flow, where the bypass unit decreases the particulate matter buildup within the particulate filter unit and eliminates high engine exhaust back pressure.

Abstract: A pre-heat system for the catalyst of the selective catalytic reduction (SCR) device includes an air blower, an interconnecting pipe, a heater unit, and a heat supply pipe. The air blower and the heater unit are in fluid communication with each other through the interconnecting pipe while the heater unit is in fluid communication with an exhaust system through the heat supply pipe. A hot-air flow generated from the air blower and the heater unit flows into the exhaust system so that the hot-air flow is able to pre-heat the catalyst of the SCR device at or close to an activation temperature. Then the SCR device can efficiently and quickly reduce Nitrogen Oxides (NOx) particles of the exhaust gas.