| 摘要 |
The control cross-section of the inlet valve after the bottom dead centre is fixed during operation. A large control cross-section of the inlet valve after "bdc" results in a high peak power in the upper speed range and a low torque at low engine speeds. A small control cross-section after "bdc" produces a high torque in the lower speed range for low power in the upper speed range. The new system adjusts the control cross-sections of the inlet valve during operation of the engine. For this purpose, the toothed belt (1), which connects the crankshaft to the camshaft, is lengthened. This toothed belt is also guided by two rollers (2), which are carried by a displaceable shaft (3). In the middle position, the mid points of the rollers, camshafts and crankshafts form the vertices of a rhombus. In a displacement of the shaft, the control cross-sections of the inlet valve are adjusted and the rhombus changes into a triangle. This device can be used in internal combustion engines and in controlling the start of injection in diesel engines. <IMAGE>
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