Transmission controlled emission control system

Claim 2

An exhaust gas recirculation control system for use on an internal combustion engine having an induction passage for air flow to the engine, an exhaust passage for exhaust gas flow from the engine and a recirculation passage having a first portion extending from said exhaust passage and a second portion extending to said induction passage comprising: exhaust gas recirculation control valve means including an inlet connected to the first portion of the recirculation passage and an outlet connected to the second portion of the recirculation passage, means forming an orifice between the inlet and outlet, valve means located within the orifice including a contoured wall portion thereon movable with respect to the walls of the orifice, a valve actuator including a variable volume hydraulic chamber having a signal port thereto, an automatic transmission including a hydraulic supply and a speed responsive governor means for producing a hydraulic signal related to vehicle speed, modulator valve means in said transmission including means sensing engine induction passage pressure and said governor signal for producing an output signal related to induction passage pressure and speed, and control valve Means including means responsive to said governor pressure and said modulator valve output signal to produce an exhaust gas recirculation control signal responsive to induction passage pressure, means for directing said exhaust gas recirculation control signal to said signal port of said actuator means for positioning said valve means with respect to said orifice to control exhaust gas recirculation from the exhaust passage to the induction passage in accordance with pressure in the induction passage.

Claim 3

An exhaust gas recirculation control system for use on an internal combustion engine having an induction passage for air flow to the engine, an exhaust passage for exhaust gas flow from the engine modulator a recirculation passage having a first portion extending from said exhaust passage and a second portion extending to said induction passage comprising: transmission means including hydraulic supply means for producing a line pressure and a speed responsive governor means for producing a first hydraulic control signal related to vehicle speed, modulator valve means in said transmission including means for sensing intake manifold pressure and said first governor hydraulic control signal and means for producing an output signal related to intake manifold pressure and vehicle speed, control valve means including means for sensing said modulator output signal, line pressure and the first hydraulic control signal to produce a modulator reference output signal proportional solely to manifold pressure, means responsive to said modulator reference output signal to produce a second hydraulic control signal reflecting mass flow of air-fuel into the induction passage, an exhaust gas recirculation having an inlet connected to the first portion of the recirculation passage and an outlet connected to the second portion of the recirculation passage, means forming an orifice between said inlet and outlet, a valve element located within said orifice having a contoured wall thereon movable relative to the walls of said orifice to vary exhaust gas recirculation flow between the exhaust passage and the induction passage, means for actuating said valve including a signal port, means for directing said second hydraulic control signal to said signal port, said actuator means positioning said valve in accordance with the pressure level of said second hydraulic signal to vary exhaust gas recirculation in accordance with mass flow through the induction passage of the internal combustion engine.

Claim 4

An exhaust gas recirculation control system for use on an internal combustion engine having an induction passage for air flow to the engine, an exhaust passage for exhaust gas flow from the engine modulator a recirculation passage having a first portion extending from said exhaust passage and a second portion extending to said induction passage comprising: transmission means including hydraulic supply means for producing a line pressure and a speed responsive governor means for producing a first hydraulic control signal related to vehicle speed, modulator valve means in said transmission including means for sensing intake manifold pressure and said first governor hydraulic control signal and means for producing an output signal related to intake manifold pressure and vehicle speed, control valve means including means for sensing said modulator output signal, line pressure and the first hydraulic control signal to produce a modulator reference output signal proportional solely to manifold pressure, means responsive to said modulator reference output signal to produce a second hydraulic control signal reflecting mass flow of air-fuel into the induction passage, an exhaust gas recirculation having an inlet connected to the first portion of the recirculation passage and an outlet connected to the second portion of the recirculation passage, means forming an orifice between said inlet and outlet, a valve element located within said orifice having a contoured wall thereon movable relative to the walls of said orifice to vary exhaust gas recirculation flow between the exhaust passage and the induction passage, means for actuating said valve including a signal port, means for directing said second hydraulic control signal to said signal port, said actuator means positioning said valve in accordance with the pressure level of said second hydraulic signal to vary exhaust gas recirculation in accordance with mass flow through the induction passage of the internal combustion engine.

Claim 5

An emission control system for use on an internal combustion engine having an intake manifold for air flow to the engine and an exhaust passage for exhaust gas flow from the engine, an exhaust valve in communication with said exhaust passageway, said exhaust valve having an air injection port therein, means for supplying air to said air injection port including a pump and air control valve means having an inlet connected to said pump and an outlet connected to said air injection port, said air control valve means including a first valve element having a contoured surface, a first orifice surrounding said contoured surface located between said inlet and outlet, actuator means for positioning said first valve element with respect to said orifice for varying air flow between the pump and the air injection port, an exhaust gas recirculation control valve including an inlet and an outlet, means forming a second orifice between said inlet and outlet, a second valve element located within said second orifice including a contoured surface thereon movable with respect to said second orifice, means for positioning said second valve element with respect to said second orifice including a hydraulic control chamber having a signal port thereto, said inlet of said exhaust gas recirculation control valve connected to the exhaust passage, the outlet of said exhaust gas recirculation control valve connected to the intake manifold of the internal combusiton engine, a transmission including hydraulic supply means for Producing a line signal and a speed responsive governor means for producing a hydraulic signal related to vehicle speed as well as a detent valve for producing a detent pressure signal in accordance with wide open throttle positions, said transmission means including a modulator valve sensing intake manifold pressure and said governor output signal for producing an output signal related to intake manifold pressure and speed, a manifold reference valve including means for sensing the output from said modulator valve, line pressure and the output signal from said governor to produce a reference signal proportional solely to manifold pressure, a reactor air signal valve including an inlet connected to the reference signal from said manifold reference valve and means for sensing the governor output pressure and transmission clutch pressures to produce an output air signal which increases in accordance with engine speed, means for directing said output air signal to said air control valve means for regulating reactor air in accordance with mass flow to the engine, and exhaust gas recirculation signal valve means including an input port for receiving the output air signal from said air signal valve and an output port for directing said output air signal to said exhaust gas recirculation valve signal port, said last mentioned signal valve means including means responsive to the detent pressure signal for cutting off said output air signal therefrom in response to transmission detent operation at wide open throttle positions.

Claim 6

An emission control system for use on an internal combustion engine having an intake manifold for air flow to the engine and an exhaust passage for exhaust gas flow from the engine, an exhaust valve in communication with said exhaust passageway, said exhaust valve having an air injection port therein, means for supplying air to said air injection port including a pump and air control valve means having an inlet connected to said pump and an outlet connected to said air injection port, said air control valve means including a first valve element having a contoured surface, a first orifice surrounding said contoured surface located between said inlet and outlet, actuator means for positioning said first valve element with respect to said orifice for varying air flow between the pump and the air injection port, an exhaust gas recirculation control valve including an inlet and an outlet, means forming a second orifice between said inlet and outlet, a second valve element located within said second orifice including a contoured surface thereon movable with respect to said second orifice, means for positioning said second valve element with respect to said second orifice including a hydraulic control chamber having a signal port thereto, said inlet of said exhaust gas recirculation control valve connected to the exhaust passage, the outlet of said exhaust gas recirculation control valve connected to the intake manifold of the internal combusiton engine, a transmission including hydraulic supply means for Producing a line signal and a speed responsive governor means for producing a hydraulic signal related to vehicle speed as well as a detent valve for producing a detent pressure signal in accordance with wide open throttle positions, said transmission means including a modulator valve sensing intake manifold pressure and said governor output signal for producing an output signal related to intake manifold pressure and speed, a manifold reference valve including means for sensing the output from said modulator valve, line pressure and the output signal from said governor to produce a reference signal proportional solely to manifold pressure, a reactor air signal valve including an inlet connected to the reference signal from said manifold reference valve and means for sensing the governor output pressure and transmission clutch pressures to produce an output air signal which increases in accordance with engine speed, means for directing said output air signal to said air control valve means for regulating reactor air in accordance with mass flow to the engine, and exhaust gas recirculation signal valve means including an input port for receiving the output air signal from said air signal valve and an output port for directing said output air signal to said exhaust gas recirculation valve signal port, said last mentioned signal valve means including means responsive to the detent pressure signal for cutting off said output air signal therefrom in response to transmission detent operation at wide open throttle positions.