摘要:
A spark plug is located in a combustion chamber so as to decrease the combustion time of the charge inducted into the combustion chamber. The charge is formed, before inducted into the combustion chamber, by mixing an air-fuel mixture and substantially inert gas such as exhaust gas so that the weight ratio of the fuel combusted in the combustion chamber and the substantially inert gas falls within the range from 1:13.5 to 1:18.5 during normal engine operation.
摘要:
A multiple-cylinder spark-ignition internal combustion engine for an automotive vehicle, in which the ratio of the inactive compounds in the mixture gases produced in each combustion chamber to the fuel component in the combustible mixture inducted into the chamber is maintained within a predetermined range and the spark plug for each engine cylinder is arranged so that the flame travel from the spark plug is reduced to a minimum for promoting the combustion reaction to proceed in the least possible time. Improvements are further made in respect of the exhaust gas recirculation rate, the location and measurements of the spark plug, the configurations and measurements of the engine cylinder and the arrangement of the intake and exhaust ports so as to reduce the concentrations of toxic compounds in the exhaust gases without impairing the performance efficiency of the engine.
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:
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 constructed and arranged such that an output vacuum of the control apparatus applied to the vacuum actuator is an amplification of the venturi vacuum modified by the intake manifold vacuum.
摘要:
Flow of secondary air into the exhaust system is regulated by diaphragm assembly controlled valves between an air supply and the exhaust system. The diaphragm assemblies respond to vacuum in the intake air system of the engine.
摘要:
An engine is provided with two spark plugs in each combustion chamber to ignite stoichiometric air-fuel mixture mixed with a large proportion of inert gases to lower NOx emission level. The engine is equipped with hydraulic valve lifters which are mechanically connected to intake and exhaust valves to control the valve overlap of the intake and exhaust valves. By the action of the valve lifters, the valve overlaps are increased in the normal driving operation range of the engine to prevent discharge at the terminal stage of exhaust valve opening exhaust gases containing a considerably large amount of hydrocarbons.
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:
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:
A vacuum signal is produced, which is representative of a function of the flow rate of engine taken air and which is employed for directly or indirectly operating a diaphragm unit of an exhaust gas recirculation control valve, by admitting atmospheric air into a vacuum from a vacuum source by employing a solenoid valve in such a manner that the solenoid valve varies the amount of admitted atmospheric air in accordance with the flow rate of engine taken air.