Method and apparatus for cooling the components of a control unit of an emission abatement assembly

A method of advancing air to a fuel-fired burner of an emission abatement assembly, the method comprising the steps of:

• advancing air into an interior chamber of a housing of a control unit,
• operating an air pump with an electronic controller, die air pump positioned in the interior chamber of the housing to draw air from the interior chamber of the housing and to the fuel-fired burner,
• operating a fuel injector with the electronic controller, the fuel injector positioned in the interior chamber of the housing, and
• transferring heat generated by the electronic controller to air in the interior chamber of the housing, the electronic controller positioned in the interior chamber of the housing.

A control unit for an emission abatement assembly, comprising:

• a housing defining an interior chamber, the housing having an air inlet that is open to the interior chamber,
• an air pump positioned in the interior chamber of the housing, the air pump having an air inlet that is open to the interior chamber of the housing to draw air therefrom,
• an electronically-controlled fuel injector, and
• an electronic controller for controlling operation of the air pump and the fuel injector, the electronic controller positioned in the interior chamber of the housing.