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Class Information
Number: 60/293
Name: Power plants > Internal combustion engine with treatment or handling of exhaust gas > By means producing a chemical reaction of a component of the exhaust gas > Condition responsive control of reactor feed, pressure, or by-pass > Of or by pressure in reactor or of engine exhaust > Check valve feeds air to exhaust system
Description: Apparatus in which a valve responsive to the difference in pressure between that of the reactor and the atmosphere open to feed reactive air to the reactor when the pressure in the reactor is below atmospheric pressure.

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8671664 System for purging a device Mar. 18, 2014
8622316 SCR-injection unit Jan. 7, 2014
8534055 Filter arrangement for exhaust aftertreatment system Sep. 17, 2013
8516803 Mechanical vacuum pump integrated with coupled secondary air injection valve Aug. 27, 2013
8468800 Secondary air and exhaust gas recirculation for a four-stroke internal combustion engine Jun. 25, 2013
8468801 Method and system for warming up catalytic converter for cleaning up exhaust gas Jun. 25, 2013
8438840 Particulate filter regeneration in an engine May. 14, 2013
8438841 Particulate filter regeneration in an engine May. 14, 2013
8429896 Engine exhaust systems with secondary air injection systems Apr. 30, 2013
8424295 Particulate filter regeneration during engine shutdown Apr. 23, 2013
8407988 Particulate filter regeneration in an engine coupled to an energy conversion device Apr. 2, 2013
8402751 Particulate filter regeneration in an engine Mar. 26, 2013
8371113 Mixing device for mixing urea and air Feb. 12, 2013
8347613 Controlling operation of exhaust of an engine including a particulate filter Jan. 8, 2013
8272208 Exhaust system with air injection Sep. 25, 2012
8266897 Low temperature emission system having turbocharger bypass Sep. 18, 2012
8240134 Engine with exhaust cooling and method Aug. 14, 2012
8234856 Exhaust emission control system for internal combustion engine Aug. 7, 2012
8215100 Regeneration device having external check valve Jul. 10, 2012
8209961 Engine-off ammonia vapor management system and method Jul. 3, 2012
8127731 Tappet clearance adjusting cover coupled with secondary air valve Mar. 6, 2012
8117831 Diesel exhaust gas temperature reduction Feb. 21, 2012
8104272 Exhaust purifying system for internal combustion engine Jan. 31, 2012
8091349 Motorcycle Jan. 10, 2012
8082733 Air handling system with after-treatment Dec. 27, 2011
8011179 Method and system for maintaining aftertreatment efficiency Sep. 6, 2011
7954313 Exhaust cleaner for internal combustion engine Jun. 7, 2011
7950223 Method and apparatus for temperature management in an exhaust gas posttreatment system May. 31, 2011
7900442 Engine including secondary air supply apparatus Mar. 8, 2011
7895824 Diagnosis apparatus for secondary air supply apparatus Mar. 1, 2011
7891172 Purification capacity recovery method of exhaust gas emission control system Feb. 22, 2011
7874148 Regeneration system and method for particulate traps Jan. 25, 2011
7856812 Exhaust device of eight-cylinder engine Dec. 28, 2010
7797924 Abnormality diagnosis apparatus for secondary air supply system of engine Sep. 21, 2010
7793495 Engine gas temperature reduction Sep. 14, 2010
7775038 Second air flow control apparatus Aug. 17, 2010
7757479 Secondary air supply system for an exhaust port of an engine Jul. 20, 2010
7757480 Air-fuel ratio control apparatus of internal combustion engine Jul. 20, 2010
7726118 Engine-off ammonia vapor management system and method Jun. 1, 2010
7721536 Particulate filter having expansible capture structure for particulate removal May. 25, 2010
7703276 Exhaust gas purifying apparatus for engine Apr. 27, 2010
7673622 Air filter, secondary air charging system and seal arrangement for a secondary air charging system Mar. 9, 2010
7637097 Control apparatus and control method for internal combustion engine provided with secondary air supply Dec. 29, 2009
7543444 Air supply apparatus Jun. 9, 2009
7530222 Hydraulic apparatus, system and method for positioning an engine exhaust flow control valve May. 12, 2009
7520125 Method for controlling the amount of secondary air Apr. 21, 2009
7516611 Secondary air injection system for an internal combustion engine Apr. 14, 2009
7487632 Method of calculating airflow introduction into an automotive exhaust air injection system Feb. 10, 2009
7464539 Method and apparatus for supplying air to emission abatement device by use of turbocharger Dec. 16, 2008
7461506 Exhaust gas cooler Dec. 9, 2008

1 2 3 4

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