Abstract:
An internal combustion engine, wherein an intake valve (9) for opening and closing an intake valve hole (7) formed in a cylinder head so as to face a combustion chamber (5) is formed hollow, an exhaust valve hole (22) formed in the intake valve (9) is opened and closed by an exhaust valve (18) stored coaxially inside the intake valve (9), the intake valve hole (7) facing the combustion chamber (5) communicates directly with an intake port (8) and the exhaust valve hole (22) facing the combustion chamber (5) communicates with an exhaust port (14) through an exhaust gas passage (21) formed inside the hollow intake valve (9), whereby the intake air charging efficiency can be increased by largely assuring the opening area of the intake valve (9), and the lowering of temperature of the exhaust gas can be minimized to effectively use waste heat since the exhaust gas just after leaving the combustion chamber (5) is not brought into direct contact with the cylinder head (3) having a large heat capacity.
Abstract:
The present invention provides a control device for continuously variable time and cross section which is added the throttle control valve (10), the element (8) of throttle control valve and the relevant drive mechanism 1 in the regular intake and exhaust system of internal combustion engine. The throttle control valve (10) is fixed in the cavity, which is composed of the fluid flow passage (11) in the cylinder head (7), the valve seat (12) and the valve (9). The throttle control valve (10) is cylindrical, and its axis of motion is just the same as that of the valve guide or is parallel with it. Through controlling the relative movement between the valve (9) and the throttle control valve (10) it is flexible to adjust the cross-section area of fluid flow passage, effective valve phase, working time, effective lift and swirl intensity of fluid movement in the course of periodic opening and closing of valve. The present invention can apparently improve the performance of cold start-up of the engine in the low temperature, and can make the engine have the perfect economical and dynamic performance, low noise and low emission. At the same time the direct control of EGR can be easily realized with it.
Abstract:
The invention relates to a head (1) of cylinder (2) for a four stroke combustion engine with a valve gear with lifting valves. The head (1) of each cylinder (2) is provided with one main conduit (3), annular shaped orifice (4) leading into the cylinder (2) its axis (5) being situated in the direction of the main axis (6) of cylinder (2) and orifice (4) of main conduit (3), provided with interior valve seat (8) and exterior valve seat (9). Inside the interior valve seat (8) and exterior valve seat (9), in its closed position an annular plate (12) is situated of the sole lifting valve (7) of cylinder (2) provided by at least one stem (11). The main conduit (3) in the head (1) is divided into an inlet conduit (15) and exhaust conduit (16), where the inlet conduit (15) is provided with a valve (17) and/or with a slide valve (18).
Abstract:
PROBLEM TO BE SOLVED: To provide a device for extracting partial exhaust gas flow, an internal combustion engine including the device, in particular, a device for extracting the partial exhaust flow from an exhaust pipe of the internal combustion engine, and the internal combustion engine including an exhaust recirculation system.SOLUTION: A device for extracting partial exhaust flow from an exhaust pipe (105) of an internal combustion engine, includes a partial exhaust pipe (106) opened to the exhaust pipe (105), and an intake portion of the partial exhaust pipe is disposed in a state of substantially facing the exhaust gas flow, so that the partial exhaust flow can flow into the intake portion of the partial exhaust pipe (106) in utilizing a dynamic pressure of the exhaust flow. The device is disposed just near flow control members (101, 104) of the internal combustion engine. A valve is disposed in the partial exhaust pipe (106) to optimize the extraction of the partial exhaust flow.
Abstract:
PURPOSE:To simplify the structure around a valve by opening/closing a single port opened to a combustion chamber with a poppet valve and switching and communicating intake/discharge passages to the said port with the bulged section of a valve stem. CONSTITUTION:A port 9 opened to a combustion chamber 7 via a single opening is formed, and a discharge passage 11 and an intake passage 10 are opened at the upper section and lower section of this port 9 respectively. A check valve 14 is provided on the discharge passage 11, and a side passage 12 is formed on the port 9. This opening is controlled to be opened/closed by a poppet valve 8A, and the intake passage 10 and discharge passage 11 opened to the port 9 are controlled to be opened/closed by a bulged section 8B formed on a valve stem. The poppet valve 8A is opened at a suction stroke, the discharge passage 11 is closed by the bulged section 8B, and air is sucked from the intake passage 10 through the side passage 12. The intake passage 10 is closed by the bulged section 8B at a discharge stroke.