RU94031582A - Plunger fuel injection pump for diesel engine - Google Patents

Abstract

FIELD: mechanical engineering; internal combustion engines. SUBSTANCE: device can be used in designing of adiabatic two-stroke two-chamber diesel engine with variable area piston aimed at establishing fuel economy record for internal combustion engines. Dependence of rise of engine thermal efficiency from increase in compression ratio and possibility of increase of compression ratio requires engine with variable piston area where piston area decreases at piston stroke to top dead center and increases at stroke to bottom dead center. 1.5-2.5-fold increase in compression ratio causes commensurable rise in losses in plunger drive for overcoming difference in atmospheric and combustion chamber pressures. No pressure difference in combustion chamber and pump fuel chamber provides considerable gain in reduction of drive power losses. EFFECT: reduced losses in drive of fuel injection pump.

Claims (1)

The device is useful in the application of the developed adiabatic two-stroke two-chamber with a variable area of the piston of a diesel engine, proposed to establish a record for efficiency for aircraft engines. The usefulness of the device is to reduce the loss on the drive of the high pressure pump. The dependence of the increase in thermal efficiency of the engine on increasing the degree of compression and the possibility of increasing the degree of compression associated with this dependence, in order to reduce the mechanical growth due to the load on the crank due to the increase in the degree of compression, requires the use of an engine with a variable piston area, where the piston area decreases when moving to TDC and increases to BDC. There is a possibility of increasing the degree of compression. An increase in the compression ratio of 1.5 - 2.5 times causes an excessive increase in the losses of the plunger drive to overcome the pressure difference between atmospheric and in the combustion chamber. The absence of a difference in pressure between the combustion chamber and the fuel chamber of the pump expects a big gain in reducing drive losses, especially when it comes to a record fuel-efficient engine.