Abstract An exhaust gas purifying device for internal combustion engines comprising a thermo-valve mounted in an air passage through which secondary air is supplied to the intake manifold and adapted to operate by responding to the degree to which the engine is warmed up, a flow rate regulating valve also mounted in said air passage through which secondary air is supplied to the intake manifold and adapted to regulate the flow rate of secondary air supplied to the intake manifold in accordance with the operating condition of the engine, a first orifice and a second orifice provided in a branch passage branching from an air passage between said two valves, a first connecting line mounted between the portion of the branch passage which is disposed posterior to the first orifice and a diaphragm chamber of a vacuum advancer provided in the ignition distributor for maintaining communication therebetween, and a second connecting line mounted between the portion of the branch passage which is disposed posterior to the second orifice and a vacuum port of the carburetor for maintaining communication therebetween. The secondary air flow rate can be regulated and the degree of vacuum advance can be reduced in accordance with the operating condition of the engine.
An exhaust gas purifying device for internal combustion engines comprising a thermo-valve mounted in an air passage through which secondary air is supplied to the intake manifold And adapted to operate by responding to the degree to which the engine is warmed up, a flow rate regulating valve also mounted in said air passage through which secondary air is supplied to the intake manifold and adapted to regulate the flow rate of secondary air supplied to the intake manifold in accordance with the operating condition of the engine, a first orifice and a second orifice provided in a branch passage branching from an air passage between said two valves, a first connecting line mounted between the portion of the branch passage which is disposed posterior to the first orifice and a diaphragm chamber of a vacuum advancer provided in the ignition distributor for maintaining communication therebetween, and a second connecting line mounted between the portion of the branch passage which is disposed posterior to the second orifice and a vacuum port of the carburetor for maintaining communication therebetween, whereby the secondary air flow rate can be regulated and the degree of vacuum advance can be reduced in accordance with the operating condition of the engine.
Claim 2
Dependent Claim
205 words
An exhaust gas purifying device for internal combustion engines comprising a thermo-valve mounted in an air passage through which secondary air is supplied to the intake manifold And adapted to operate by responding to the degree to which the engine is warmed up, a flow rate regulating valve also mounted in said air passage through which secondary air is supplied to the intake manifold and adapted to regulate the flow rate of secondary air supplied to the intake manifold in accordance with the operating condition of the engine, a first orifice and a second orifice provided in a branch passage branching from an air passage between said two valves, a first connecting line mounted between the portion of the branch passage which is disposed posterior to the first orifice and a diaphragm chamber of a vacuum advancer provided in the ignition distributor for maintaining communication therebetween, and a second connecting line mounted between the portion of the branch passage which is disposed posterior to the second orifice and a vacuum port of the carburetor for maintaining communication therebetween, whereby the secondary air flow rate can be regulated and the degree of vacuum advance can be reduced in accordance with the operating condition of the engine.
Claim 3
Dependent Claim
61 words
An exhaust gas purifying device as defined in claim 1 wherein said thermo-valve comprises a bimetallic strip of the pan shape formed with an air suction port in the central portion which is adapted to suddenly buckle into an upwardly directed convex shape when the engine is thoroughly warmed up so as to thereby introduce secondary air to the intake manifold.
Claim 4
Dependent Claim
50 words
An exhaust gas purifying device as defined in claim 1 wherein said thermo-valve comprises a bimetallic strip supported in a cantilever fashion which is adapted to operate gradually as the engine is warmed up till it is brought to a fully open position when the engine is thoroughly warmed up.