摘要:
According to the invention, an EGR control apparatus of an engine includes intake ports to which an intake passage is connected, the intake ports opening into each combustion chamber of the engine, an EGR port to which an EGR passage branching out from an exhaust passage is connected, the EGR port opening into each combustion chamber of the engine, an electrically-operated compressor disposed in the EGR passage for regulating pressure at which EGR gas is introduced into each combustion chamber, and an EGR control valve disposed in the EGR passage at a point downstream of the electrically-operated compressor for controlling the amount of EGR gas introduced into each combustion chamber. The EGR passage branches out from the exhaust passage at a point downstream of an emission control device disposed in the exhaust passage.
摘要:
The invention relates to an air system intake module for an internal combustion engine, having one air inlet passage connected to an air cleaner housing (101) and plural air outlet passages (105) connected to a cylinder; wherein said air inlet passage of said air intake module is constituted of a straight form conduit which is connected to an air outlet of said air cleaner housing (101); to said straight form conduit a throttle shaft is supported rotatably, and to said throttle shaft a throttle valve (103) for adjusting an air flow amount which is supplied to said air intake module is installed; and to an upstream side of said throttle valve (103) of said straight form conduit an air flow measuring portion (102) is mounted.
摘要:
A method is described for varying the engine load while maintaining optimum charge stratification in a stratified charge engine. In the invention, at least under low and part load conditions, the intake streams (22, 32) supplying the stratified charge are throttled (50, 60) in proportion to one another so as to vary the charge density uniformly across the entire combustible charge without significantly varying the relative volumes of the separate streams nor their relative velocities as they are drawn into the combustion chamber, the relative velocities being such as to minimise mixing within the combustion chamber between the intake streams during the intake and compression periods of the engine.
摘要:
An air intake system for an internal combustion engine 206 including an air cleaner chamber 201, a surge tank 204, a throttle valve 203, an air flow meter and independent air conduits 205, preferably of variable effective length, to the engine cylinders. The system may also incorporate one or more of the following: fuel injector valves and fuel supply lines, auxiliary air lines 210 to each cylinder to create a swirl in the cylinders to enhance combustion of a lean mixture, and EGR gas passages 214, in which at least some of the components are preferably formed in one or more integral resin mouldings. An associated engine control unit 222 to optimise engine operation by adjusting the richness or leanness of the fuel/air mix and the EGR supply is provided.
摘要:
A spark ignited four stroke engine employing exhaust gas recirculation and stratification of the recirculated exhaust gas has at least one cylinder (2) accommodating the piston (32) and communicating with at least one inlet port (11) cooperating with an inlet valve (3) for inducing air into the cylinder and at least one exhaust port (8) cooperating with the exhaust valve (6) for discharging exhaust gas from the cylinder. The inlet port (11) is so constructed and arranged that air flowing through it is caused to swirl in the cylinder about the cylinder axis in one direction. The port for introducing recirculated exhaust gas into the cylinder is so constructed and arranged that exhaust gas flowing through it is caused to swirl in the cylinder about the cylinder axis in the said one direction. The inlet valve (3) and the exhaust valve (6) are connected to be operated by respective variable valve timing mechanisms (34,36) which are so controlled, at low engine loads, that at the beginning of each induction stroke of the piston the exhaust valve (6) is open and the inlet valve (3) is closed wherby initially exhaust gas is induced into the cylinder whereafter the exhaust valve (6) is closed and the inlet valve (3) is opened and air is induced into the cylinder.
摘要:
An air intake arrangement for an internal combustion engine comprising : a main air intake conduit leading to a gas intake valve (241) for respective engine cylinders (206) and including a main air intake passage (202), a main collector chamber (204) and independent branching air intake passages (205) for the respective engine cylinders (206) connected in series ; a throttle valve (203) disposed in the main intake air passage (202) for controlling the flow rate of air passing therethrough ; an auxiliary air intake passage (210) bypassing the main air intake conduit, an inlet port of the auxiliary air intake passage (210) opens into the main air intake passage (202) at the upstream of the throttle valve (203), an outlet port (213) of the auxiliary air intake passage (210) opens into the respective independent branching air intake passages (205) near the gas intake valve (241) for the respective engine cylinders (206) in such a manner that gas blown-out from the auxiliary air intake passage (210) induces a gas swirl in the respective engine cylinders (206) ; an intake air control valve (211) disposed in the auxiliary air intake passage (210) for controlling the flow rate of air passing therethrough ; and a control unit (222) which determined an operating condition of the internal combustion engine and controls an opening degree of the intake air control valve (211) based on the determined engine operating condition.
摘要:
The invention relates to a tunable intake system (1) for exhaust gas recirculation in an internal combustion engine with a plurality of cylinders, the system comprising: - an exhaust gas recirculation manifold (2) arranged to distribute recirculated exhaust gas in an intake air stream to be introduced into the combustion engine; - the manifold (2) having an exhaust gas recirculation inlet (3) and an intake air inlet (4) as well as at least one outlet (5) leading to the multiple cylinders of the engine; - a first distribution pipe (6) connected to the exhaust gas recirculation inlet (3), said first distribution pipe (6) having a first pattern of flow distribution perforations (7) for distributing the recirculated exhaust gas into the manifold (2), where the invention is especially characterized in: - a second distribution pipe (8) with a second pattern of flow distribution perforations (9) for distributing the recirculated exhaust gas into the manifold (2) is fitted outside of said first distribution pipe (6) whereby an interstitial gap (10) is formed therebetween, and - at least one of said first and second distribution pipes (6, 8) being rotatable with respect to the other in order to selectively tune the distribution of recirculated exhaust gas for multiple operational points of the engine.
摘要:
An engine (100) has cylinder-side passages (151) to (154), through which burnt or exhaust gasses pass. Also, the engine (100) includes an inter-cylinder passage (150) in communication with the cylinder-side passages (151 to 154).