摘要:
Internal combustion engine and method with compression and expansion chambers of variable volume, a combustion chamber, a variable intake valve for controlling air intake to the compression chamber, a variable outlet valve for controlling communication between the compression chamber and the combustion chamber, means for introducing fuel into the combustion chamber to form a mixture of fuel and air which burns and expands in the combustion chamber, a variable inlet valve for controlling communication between the combustion chamber and the expansion chamber, a variable exhaust valve for controlling exhaust flow from the expansion chamber, means for monitoring temperature and pressure conditions, and a computer responsive to the temperature and pressure conditions for controlling opening and closing of the valves and introduction of fuel into to the combustion chamber to optimize engine efficiency over a wide range of engine load conditions The relative volumes of the compression and expansion chambers and the timing of the valves are such that the pressure in the combustion chamber remains substantially constant throughout the operating cycle of the engine, and exhaust pressures are very close to atmospheric pressure regardless of the load on the engine The engine runs so quietly and burns so cleanly that in some applications it may not require a muffler and/or a catalytic converter.
摘要:
Constant pressure internal combustion engine having an elongated combustion chamber which in some embodiments is folded back upon itself and has a rough, twisting interior side wall, a fuel inlet for introducing fuel into the chamber, a compression chamber in communication with the combustion chamber, means for varying the volume of the compression chamber and combustion chamber to form a mixture of fuel and air that burns as it travels through the chamber and is further mixed by the rough, twisting side wall of the chamber, an expansion chamber in communication with the combustion chamber, and an output member in the expansion chamber which is driven by pressure produced by the burning mixture, with the means for varying the volume of the compression chamber and the output member in the expansion chamber being connected together for movement in concert such that the pressure remains substantially constant within the combustion chamber. A gas flow separator near the fuel inlet forms one or more smaller volumes within the combustion chamber where the fuel can mix and burn with only a portion of the air introduced into the chamber. Long, sharp protrusions extend inwardly from the wall of the combustion chamber and form hot spots which help to provide complete combustion of the fuel mixture throughout the combustion chamber, and these protrusions, together with flow turbulators within the chamber, promote complete mixing and, hence, combustion of the fuel and air.
摘要:
A roller valve lifter apparatus for following an eccentric cam in an internal combustion engine includes a cylindrical roller, configured to roll upon the eccentric cam, and a lifter body, having a curved roller socket configured to retain the roller and to allow rotation of the roller in the roller socket upon a layer of lubricating fluid trapped between the roller surface and a bearing surface of the roller socket. In one embodiment the roller socket includes tapered end portions defining distal gaps between the roller surface and the bearing surface, for allowing entry of splash oil therebetween.
摘要:
The invention relates to a hydraulic valve-lash-adjusting element, having a plunger (1), in the plunger head (2) of which a control valve (5) is arranged, this control valve (5) controlling a central axial bore (6) which connects a low-pressure space (4), arranged above the plunger head (2), to a high-pressure space (3) arranged below the plunger head (2), the control valve (5) having a valve-closing body (7) which is loaded in the opening direction by a valve-body spring (17) and as a result passes from a cylinder-ring-shaped sealing surface (8) arranged on the plunger head (2) to a travel-limit surface (9) of a centre piece (24), whereas the closing of the control valve (5) is effected by displacement of oil from the high-pressure space (3) into the low-pressure space (4). According to the invention, the valve-closing body (7) reaches the sealing surface (8) on a linear path without lateral movement or rotation of said valve-closing body (7) by virtue of the fact that a circular-cylindrical and axially parallel guide surface connected to the plunger head (2) is provided, this guide surface enclosing a corresponding guide line (40) of the valve-closing body (7) with guide clearance.
摘要:
A valve seal for a rotary valve assembly for use in an internal combustion engine of the piston and cylinder type, wherein the cylinder head/combustion chamber is designed for high compression and of long stroke, such as a diesel engine, the rotary valves and the valve seals being positioned in relationship so as to permit charging of the cylinder with a fuel/air mixture and evacuation of spent gases, and to regulate the pressure within the valve seal and valve seat and hence regulate the pressure between the valve seal and the rotary valve.
摘要:
In a camshaft adjustment control device for an internal combustion engine arranged in the drive train for a camshaft, with an inner body connected to the camshaft and an outer body rotatable relative to the inner body, and a control space between the inner and the outer bodies to which hydraulic fluid can be supplied for adjusting the relative angular positions of the inner body connected to the camshaft and the outer body driven by the crankshaft, the inner body is mounted to the camshaft by a bolt having a central bore in which a control spool valve is disposed controlling the flow of fluid to and from the control space and a check valve is arranged in the supply lines of the hydraulic fluid to the control spool valve which check valve opens when a certain pressure is applied thereto.
摘要:
The space between the outer side-surfaces 17 of a pair of side-wall sections 4 is not parallel to each other due to differences in expansion amount during plastical deformation. In use, a load is applied to the pivot 3 from the side where the space between the outer side surfaces 17 is narrow to the side where the space is broad. A crimped section 13a is formed on the outer periphery at the opposite end surfaces of the pivot 3, on the half on the side where the space between the outer side surfaces 17 is narrow. Therefore, the outer peripheral surface of the opposite ends of the pivot 3 comes into contact with the inner peripheral surface of the through hole 11 on the load support side. Consequently, the load is sufficiently supported by the contact surface, and even after being used for a long time of period, lost motion is prevented from occurring on the support section at the opposite ends of the pivot 3 with respect to the pair of side-wall section 4.
摘要:
A bearing assembly for a rotatable shaft, the bearing assembly having a bearing carrier housing, the housing having a fixed first end and a removably securable second end, the first and second ends having an aperture therethrough for passage of the rotatable shaft, there being packed within the housing a plurality of bearing elements, each bearing element having an inner race having an inner bearing surface dimensioned to the circumference of the rotatable shaft, and an outer race concentric with the inner race and separated therefrom by a plurality of rotatable bearing means positioned between said the race and the outer race, the inner race and the rotatable bearing means freely rotatable in relationship to the outer race and rotatable shaft.
摘要:
Disclosed is a shim or a valve lifter for an automotive engine valve driving system that slides against a cam lobe of a camshaft to drive an intake/exhaust valve of an internal combustion engine. The shim or lifter has the top of a sliding surface thereof opposing the cam lobe and being coated with a hard carbon film. The hard carbon film has a surface hardness of 1500 to 4500 kg/mm2 in terms of Knoop hardness, a thickness of 0.3 to 2.0 nullm and a surface roughness Ry (nullm) satisfying the following equation (A): Ry
摘要翻译:公开了一种用于汽车发动机气门驱动系统的垫片或气门挺杆,其滑动抵靠凸轮轴的凸轮凸轮以驱动内燃机的进气/排气门。 垫片或提升器具有与凸轮凸角相对的滑动表面的顶部并且涂覆有硬碳膜。 硬碳膜的表面硬度为Knoop硬度为1500〜4500kg / mm 2,厚度为0.3〜2.0μm,表面粗糙度Ry(mum)满足下式(A):Ry < (0.75-Hk / 8000)xh + 0.07 / 0.8}(A)其中h是硬碳膜的厚度(mum); Hk为硬碳膜的kn硬度(kg / mm 2)。 通过赋予硬质碳膜耐久性,可靠性和低摩擦系数,据说低延展性,以防止硬碳膜在应用于滑动部分时变得破裂和分离,用于汽车发动机气门的垫片或升降器 驱动系统以及这种垫片或升降器与凸轮轴的组合可以提供优异的摩擦特性和高耐久性。
摘要:
Peeling occurring in a short period of time is avoided in a roller member such as a roller cam follower of a cam apparatus in a valve system of a car engine. The roller member is produced by heating an already processed a roller member material in a carburizing atmosphere of carbon potential being 1.2% or more at 840 to 870null C. for 3 hours or longer, thereby to carry out a carburization treatment, followed by quenching, said roller member material being formed in a predetermined shape from a bearing steel. Thereby, all amount of carbon are rendered to be 1.0 to 1.6 wt % in a surface portion of a range from a surface of a rolling face until a depth where a maximum shearing stress acts on, an amount of solute carbon is is rendered to be 0-6 to 1.0 wt % in a matrix of said surface portion, and said surface portion is precipitated with carbides of 5 to 20% in an area rate and of particle size being 3null or less.