Electromechanically actuated solenoid exhaust gas recirculation valve

An exhaust gas recirculation valve, comprising:

• a motor housing including, a bobbin, an armature having a bore formed therein, and a valve stem, said valve stem secured within said bore;
• a valve housing including a valve inlet adapted to receive exhaust gas, a valve seat, a valve poppet located at an end of said valve stem to engage and disengage said valve seat to open and close a valve opening, thereby allowing or preventing said exhaust gas to pass to an engine intake;
• a sensor housing, including a plunger extending therefrom into said motor housing, said plunger in communication with said valve stem to monitor the position thereof;
• and
• an armature bearing that is positioned within said motor housing and is in communication with an outer surface of said armature to position said valve stem as said valve opening is being exposed and wherein said armature bearing is positioned within said motor housing between a flux return and a pole piece.

An exhaust gas recirculation valve for accurately controlling the flow of engine exhaust gas to an engine intake, comprising:

• an outer can portion defining a motor housing therein and having an opening formed in a bottom surface;
• a sensor housing secured to said valve and disposed above said motor housing;
• an armature disposed within said motor housing and in electromagnetic communication with a solenoid coil disposed therearound, said armature having a bore formed therein;
• a valve housing disposed beneath said outer can portion, said valve housing including an exhaust gas inlet passage, a valve opening in communication with said exhaust gas inlet passage, a valve seat surrounding said valve opening, and an exhaust gas exit passage;
• a flexible diaphragm disposed between said motor housing and said sensor housing said diaphragm having an outer periphery positioned at a junction defined by said outer can portion, said motor housing, and said sensor housing to prevent any leakpaths to atmosphere at said junction;
• a valve stem having an upper portion and a lower portion, said upper portion fixed within said armature bore and said lower portion having a poppet formed thereon for communication with said valve seat, said valve stem passing through said opening in said outer can bottom surface;
• and
• a plunger extending from said sensor housing and in communication with said valve stem to monitor the position of said valve stem with respect to said valve seat.

An exhaust gas recirculation valve for accurately controlling the flow of engine exhaust gas to an engine intake, comprising:

• an outer can portion defining a motor housing therein and having an opening formed in a bottom surface;
• a sensor housing secured to said valve and disposed above said motor housing;
• an armature disposed within said motor housing and in electromagnetic communication with a solenoid coil disposed therearound, said armature having a bore formed therein;
• a valve housing disposed beneath said outer can portion, said valve housing including an exhaust gas inlet passage, a valve opening in communication with said exhaust gas inlet passage, a valve seat surrounding said valve opening, and an exhaust gas exit passage;
• a seal positioned at a junction between said outer can portion, said motor housing, and said sensor housing to prevent any leakpaths to atmosphere at said junction;
• a valve stem having an upper portion and a lower portion, said upper portion fixed within said armature bore and said lower portion having a poppet formed thereon for communication with said valve seat, said valve stem passing through said opening in said outer can bottom surface;
• and
• a plunger extending from said sensor housing and in communication with said valve stem to monitor the position of said valve stem with respect to said valve seat.

An exhaust gas recirculation valve for accurately controlling the flow of engine exhaust gas to an engine intake, comprising:

• an outer can portion defining a motor housing therein and having an opening formed in a bottom surface;
• a sensor housing secured to said valve and disposed above said motor housing;
• an armature disposed within said motor housing and in electromagnetic communication with a solenoid coil disposed therearound, said armature having a bore formed therein;
• a valve housing disposed beneath said outer can portion, said valve housing including an exhaust gas inlet passage, a valve opening in communication with said exhaust gas inlet passage, a valve seat surrounding said valve opening, and an exhaust gas exit passage;
• a valve stem having an upper portion and a lower portion, said upper portion fixed within said armature bore and said lower portion having a poppet formed thereon for communication with said valve seat, said valve stem passing through said opening in said outer can bottom surface;
• a plunger extending from said sensor housing and in communication with said valve stem to monitor the position of said valve stem with respect to said valve seat;
• and
• a pole piece disposed around another portion of said solenoid coil, said pole piece positioned below said flux return such that said pole piece and said flux return do not meet such that a gap is formed between said pole piece and said flux return;
• wherein said motor housing further comprises a partition member positioned below said solenoid coil and in contact with said sprig to support said solenoid coil in said motor housing;
• wherein said pole piece, said partition member, and said outer can portion meet at a junction and wherein a seal is positioned at said junction to prevent any leakpaths to atmosphere.

An exhaust gas recirculation valve for accurately controlling the flow of engine exhaust gas to an engine intake, comprising:

• a motor portion, including an outer can portion, a solenoid coil disposed within said outer can portion, and an armature in electromagnetic communication with said solenoid coil;
• a valve housing including an exhaust gas inlet passage, a valve opening in communication with said exhaust gas inlet passage. a valve seat surrounding said valve opening, and an exhaust gas exit passage;
• a valve stem extending between said motor housing and said valve housing and having an upper portion secured to said armature and a lower portion in communication with said valve opening;
• a sensor housing secured to said valve and in communication with said motor housing to monitor the position of said valve stem with respect to said valve seat;
• and
• an annular cavity formed in said motor housing to prevent heat from said valve housing from transforming to said motor housing;
• an armature bearing that is positioned within said motor housing and is in communication with an outer surface of said armature to position said valve stem as said valve opening is being exposed and wherein said armature bearing is positioned within said motor housing between a flux return and a pole piece.