| 摘要 |
The object of the invention is a <b>multi-purpose internal combustion engine,</b> which is a 4-stroke engine with or without a turbocharger with a spark ignition or compression ignition, which can work interchangeably in 2 different ways: 1. - normal operation, by using all cylinders as shown in Fig. 1A and 6A; 2.- in an economical way, when some of its cylinders are switched off and with expansion of the exhaust gases in these cylinders from the cylinders working as in Fig. lB, 2C and 2D as well as 6B, 7C and 7D. The exhaust gas pressure in the cylinders at the time of opening the exhaust valves is even up to 6 bar above the atmospheric pressure. This engine differs from a normal engine mainly by the construction of the head and timing. When the vehicle gains speed and when the demand for power is much smaller, the engine control unit switches off the operation in some of its cylinders and changes the control of the valves. Then, the engine works in an economical way. The expected increase in efficiency is up to 15% compared with the engine in which the power is switched off only in some of the working cylinders. |
