Abstract: The invention provides a control strategy and a control system to control a gas sensor to a target operating temperature. It relies upon both feedback and model-based feedforward control systems to achieve and then maintain the sensor at the target operating temperature. The mechanization includes a gas sensor with a heating element in a feedstream. The control strategy employs a control system for the heating element that is based upon the target operating temperature, the temperature of the heating element, and an effect of the feedstream and mounting structure on the temperature of the sensor. The control strategy enables the control system to optimize the heating of a sensor during warm-up and steady state operations.

Abstract: The invention provides a control strategy and a control system to control a gas sensor to a target operating temperature. It relies upon both feedback and model-based feedforward control systems to achieve and then maintain the sensor at the target operating temperature. The mechanization includes a gas sensor with a heating element in a feedstream. The control strategy employs a control system for the heating element that is based upon the target operating temperature, the temperature of the heating element, and an effect of the feedstream and mounting structure on the temperature of the sensor. The control strategy enables the control system to optimize the heating of a sensor during warm-up and steady state operations.

Abstract: An exhaust manifold catalytic warm-up converter for an automotive vehicle engine includes tubular runners having inlet and outlet ends and connectable at their inlet ends with exhaust ports of an engine. The runners are joined at their outlet ends with a common exhaust outlet. A generally helical twisted tape extends longitudinally in each of the runners between their inlet and outlet ends and laterally divides the runners into at least two parallel generally helical flow passages. The tape is porous and formed of a material having a predetermined thickness and porosity to encourage a flow of exhaust gases through pores of the tape between adjacent helical passages due to pressure gradients across the tape resulting from gas flow in the helical passages. The porous tape has a low thermal inertia for fast warm-up and is coated with a catalytic material for stimulating reaction of emissions in the engine exhaust gases passing through the exhaust manifold. Additional features and alternatives are disclosed.

Abstract: An exhaust gas management apparatus including: a first substrate coated with an oxidizing catalyst, wherein the first substrate includes an axial opening and a body portion radially exterior of the axial opening, wherein the axial opening comprises at least part of a bypass passage; an air source located downstream in an exhaust flow path of the axial opening; an air pump unit responsive to a control signal forcing air through the air source wherein, during an activation of the pump unit, the bypass passage is valved shut; and a second substrate coated with an oxidizing catalyst located in the path of exhaust downstream of the first substrate.

Abstract: An exhaust gas management apparatus including: an air flow directing body forming a bypass passage including an inlet end and an outlet end and defining a low pressure region between the inlet end and the outlet end having a first diameter less than second and third diameters of the inlet and outlet ends, respectively; a hydrocarbon adsorber mounted radially exterior of the air flow directing body; an air source located downstream in an exhaust flow path of the low pressure region of the air flow body; and an air pump forcing air through the air source wherein, during activation of the pump, the bypass passage is valved shut at the low pressure region, wherein less air is required to valve shut the bypass passage than would be required at another location within the bypass passage.