38 results about "Cam engine" patented technology

The invention relates to a self-resetting single-valve double-piston hydraulic driving device and method for an overhead cam engine. The self-resetting single-valve double-piston hydraulic driving method comprises the steps that a driving main piston and a driving auxiliary piston are correspondingly arranged on a rocker arm body and a valve bridge body, the driving auxiliary piston is connected with an exhaust valve, and a driving oil way communicates with the driving main piston, the driving auxiliary piston and a driving control valve; when the driving control valve opens the driving oil way, the driving main piston and the driving auxiliary piston achieve hydraulic linkage, the rocker arm body and the valve bridge do not move during lift driving, and the driving auxiliary piston opensthe exhaust valve; when the main lift starts, a main piston body oil way and an auxiliary piston oil way are disconnected, and the driving auxiliary piston automatically resets; and when the driving oil way is disconnected, in the integrated cam driving lift process, the driving main piston absorbs the driving lift of an integrated cam assembly to the rocker arm body, the rocker arm body does notmove, and the integrated cam driving lift is not transmitted to one side of the exhaust valve. The self-resetting single-valve double-piston hydraulic driving method is simple in principle and compactin structure, and the reliability and durability of engine driving operation are improved.

Discloses is a single valve opened engine auxiliary valve actuator. The single valve opened engine auxiliary valve actuator comprises an auxiliary cam and an auxiliary valve gap compensating mechanism. The auxiliary valve gap compensating mechanism is integrated within a common rocker arm of an engine and between the auxiliary cam and a valve of the engine; in a non-operating position of the auxiliary valve gap compensating mechanism, a gaps can be generated between the auxiliary cam and the valve to cancel the movement transmission between the auxiliary cam and the valve; in an operating position of the auxiliary valve gap compensating position, connection can be formed between the auxiliary cam and the valve to generate engine-assisted valve motion. The auxiliary valve gap compensating mechanism can be a hydraulic locking mechanism or a mechanical clutch mechanism. The single valve opened engine auxiliary valve actuator can be used for generating special cam engine braking or waste gas circulating auxiliary valve movement, thereby improving the performance of the engine.

Methods and apparatus to selectively use engine valves as both intake and exhaust valves and to selectively operate the engine as a 2 cycle or as a 4 cycle engine. In a disclosed embodiment, the intake valves and the exhaust valves, are manifolded together through a small manifold, with the manifold being connectable to the intake manifold or the exhaust manifold through two-way valves. In preferably a camless engine, the engine valves may be controlled to operate the intake valves as intake valves only or to operate as both intake valves and exhaust valves, and to operate the exhaust valves as exhaust valves only or to operate the exhaust valves as both intake valves and exhaust valves. Exemplary embodiments are disclosed.

The invention relates to an independent cam engine brake device, which is characterized in that: oil passages in a rockshaft stool and an exhaust rocker are communicated with a brake oil passage; the tail end of the rockshaft stool is a brake driving part; the front end of the exhaust rocker is a brake driven part; a cavity of the brake driving part is communicated with the oil passage of the rockshaft stool; a brake driving piston is arranged on the right of a control valve in the cavity of the brake driving part, and is sleeved with a driving piston return spring; a cavity of the brake driven part is communicated with the oil passage of the exhaust rocker; a brake driven piston is arranged in the cavity of the brake driven part, and is sleeved with a driven piston return spring; and an exhaust valve is arranged above the tail end of the brake driven part. The independent cam engine brake device is simple in structure, high in rigidity and low in cost, can effectively make up the defect of foot brake power, avoids brake force reduction and failure caused by using a brake for a long time, and ensures vehicle safety.

A timing belt system for an air cooled Twin Cam V-Twin motorcycle engine is provided. The timing belt system includes a crankshaft pulley assembly including a crankshaft pulley affixed to the crankshaft and a pulley flange affixed to the crankshaft pulley. The timing belt system also includes a camshaft pulley assembly including a spider gear having spindle affixed to the rear cam end of the Twin Cam engine and a hub having slotted apertures fastened to a camshaft pulley fastened. A timing belt having teeth is connects the crankshaft pulley to the camshaft pulley to turn the camshafts in synchronized rotation with the crankshaft. The spider can be rotated relative to the camshaft pulley and fastened thereto using bolts extending through the slotted apertures to Advance or Retard the timing of the camshafts relative to the crankshaft.

The invention relates to a timing belt, in particular to a low-noise automobile timing driving belt. The low-noise automobile timing driving belt comprises an annular belt body, wherein the belt body is formed by binding a belt back and a meshed part, the meshed part is provided with a plurality of tooth parts which are spaced along the inner circumferential surface of the belt body, a core rope skeleton is embedded inside the meshed part along the circumferential direction of the belt body, an interlayer fabric is arranged between the belt back and the meshed part, and the inner circumferential surface of the meshed part is provided with a tooth-shaped fabric layer covering the tooth parts. Through the measurement, when the low-noise automobile timing driving belt is applied to a 1.8L top-mounted double-cam engine, the resonance phenomenon is eliminated, the noise is remarkably lowered, and the noise is hardly heard when a timing system protection shield is covered.

A twincam engine including a rocker arm configured to transmit rotation of a cam to reciprocate at least one of intake and exhaust valves, the rocker arm being pivotally attached to a cylinder head between a center axis of a valve stem of the intake valve and a center axis of a valve stem of the exhaust valve.

The invention relates to an overhead cam engine. For there is a heavy working load of prior cam engine and intake and outtake valves can not achieve the valve phase demand when they are opened and closed, the design is improved. The invention comprises cylinder body, cylinder head and crankshaft box. The crankshaft is connected with the piston through a linkage device. It is characterized in that at the position of cylinder head, intake and outtake valves are installed in parallel; an outtake crankshaft and an outtake cam are set between intake and outtake valves; the upper end of cylinder head is connected with a support and on the support intake camshaft and intake cam are set; cam faces of intake and outtake cams control intake and outtake valves opening or closing by a rocker; the outtake camshaft is connected with the crankshaft by the transmission device and the intake camshaft is connected with the outtake camshaft by the transmission device. The working load of invention is small. When intake and outtake valves are opened and closed the reasonable valve phase can be achieved.

A camless engine operating system that includes an inlet valve switch configured to detect rotational movement of an inlet valve power disc and to output an inlet actuator voltage. A voltage level of the inlet actuator voltage is synchronous with the rotational movement of the inlet valve power disc. An inlet valve is movable to open and close an intake port of a combustion chamber. An inlet valve mechanical force moves the inlet valve to open the intake port. An inlet actuator is configured to exert the inlet valve mechanical force onto the inlet valve. The inlet actuator voltage received by the inlet actuator controls the inlet actuator to exert the inlet valve mechanical force onto the inlet valve.

The invention discloses an efficient lubrication system of engine cylinder heads of a contravariant small-sized dual-cylinder generator set. Cylinder head mechanisms of a top cam-type dual-cylinder engine in the set are mainly improved. According to the improvement core, the efficient lubrication system is characterized in that an oil injection pump is arranged in a crankshaft box, an oil inlet ofthe air injection pump is soaked in an engine oil pool of the bottom of the box, oil outlets are connected with cylinder head oil inlets formed in cylinder head cavities of the two sides through pipes and distribution valves separately, a concave cavity is formed in the portion, below a cam, in each cylinder head cavity and used as a cam engine oil pool which is used for storing engine oil flowing into the cavities, and the engine oil is thrown to an air door rocker mechanism through cam rotation; cylinder head oil outlets are further formed in the cylinder head cavities and connected with oil return holes formed in the crankshaft box through oil return pipes. According to the efficient lubrication system, internal mechanisms of cylinder heads are more efficiently lubricated, the structural design of the cylinder heads is conveniently simplified, and heat dissipation is even.

The invention relates to a cam engine used in different field of the mechanical engineering, as internal-combustion engines, compressors, pumps etc. The cam engine comprises cylinders (26) with pistons (25), cylindrical tubular 3D cam (20) having a cam groove on the inner cylindrical surface and at least two asynchronously moving followers (1a and 1b) with arms (37) having main and additional rollers (3, 5).

To compact a combustion chamber and downsize a cylinder head in an overhead cam engine, wherein a cam shaft is provided between intake and exhaust valve springs and is rotatably supported by the cylinder head; and wherein the cam shaft is provided with a first cam to drive one of an intake valve and an exhaust valve and is provided with a second cam to drive the other of the intake valve and the exhaust valve. A cylinder head 16F supports a cam shaft 131 with its axis line approximately disposed above a cylinder axis line. A second cam 143 is disposed between intake and exhaust valve springs 129 and 130 and is formed to be smaller than a first cam 142. The first cam 142 is disposed farther from the position between the intake and exhaust valve springs 129 and 130 along the direction of the axis line of the cam shaft 131.