摘要:
A valve disposed in the central space of the manifold normally divides the space into two halves to avoid mutual interference of exhaust gas flows. At low engine speeds, the valve causes the exhaust gas flows from all branches to be disturbed and to mix with each other, to promote oxidation of HC and CO.
摘要:
A valve operating mechanism comprising a valve, a cam, a cam shaft for rotating the cam about an axis, a rocker lever rotatably mounted about a rocker lever shaft. The rocker lever is axially movable along the rocker lever shaft. The cam is tapered in the longitudinal direction of the axis and has a uniform cross sectional shape. The rocker lever has an arm formed with a surface engaging the cam and an opposite arm provided with means for engaging the end of a valve stem of the valve.
摘要:
Hemispherical combustion chambers of a cross flow type cylinder head, having symmetrically disposed and synchronously sparked plugs are fed a near stoichiometric air fuel mixture containing up to 40% EGR gas which after combustion is exhausted through individual ports, mixed with secondary air supplied by a simple reed valve and oxidized in a catalytic converter.
摘要:
An internal combustion engine of the reciprocating piston type, which is provided with an exhaust gas recirculation circuit to suppress the formation of NOx and has two or three spark plugs for each combustion chamber. There is a substantial overlap of the opening periods of exhaust and intake valves, so that a portion of the combustion gas is left unexhausted. The combustion chamber has a simple shape such as hemisphere, and the spark gaps of the plural spark plugs are arranged distant from each other in each combustion chamber so as to respectively share approximately equally divided portions of each combustion chamber. The number of the spark plugs is two when the volume of the recirculated exhaust gas, including the unexhausted combustion gas, is about 50% at the maximum of the volume of air admitted into the combustion chamber but three when the recirculated exhaust gas amounts to about 60% of the air at the maximum.
摘要:
Two sets of breaker contacts respectively associated with independent ignition systems have two breaker arms with identical configuration, arranged coaxially one above the other to engage a cam at an identical angular position thereof whereby the contacts open and close synchronously.
摘要:
The valve lift and the valve timing of the intake and exhaust valves of an internal combustion engine are changed in response to an engine operating condition. Furthermore, the intake and exhaust valves are maintained closed during deceleration of the engine.
摘要:
An air-fuel mixture containing a relatively large amount of recirculated exhaust gases is smoothly and rapidly burned by producing squish turbulence and igniting the mixture with a plurality of spark plugs.
摘要:
A plurality of pump elements is progressively increasing the pressure of air to respectively supply air at various pressures into portions in an exhaust gas purifying system requiring secondary air.
摘要:
A dual spark plug ignition engine is equipped with an EGR system. The two spark plugs in each combustion chamber are simultaneously energized to produce sparks to ignite the charge in the combustion chamber under a normal engine operating conditions, whereas the spark plugs are energized with a predetermined phase difference from each other under high power output engine operating conditions.
摘要:
An exhaust gas recirculation system comprises an exhaust gas flow control valve; a vacuum actuator for operation of the flow control valve; and a control apparatus for the vacuum actuator. The control apparatus comprises a vacuum regulator and a vacuum motor for actuating the vacuum regulator in response not only to the venturi vacuum but also to the intake manifold vacuum.