Pumps – Motor driven – Internal-combustion engine
Patent
1983-07-11
1986-11-04
Husar, Cornelius J.
Pumps
Motor driven
Internal-combustion engine
417380, 417397, 417510, 123 46A, F04B 3500, F02D 3910
Patent
active
046208364
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a pressure system apparatus which includes a cylinder-piston arrangement, preferably a component of an internal combustion engine, which is connected to a piston pump, and includes an oscillating piston, and wherein the cylinder of the pump is connected through valves with a pressure accumulator and a substantially pressureless tank.
Arrangements of this type serve mostly to convey pressure media from a tank under pressure into a pressure accumulator, the drive of the pump usually being accomplished through an internal combustion engine. In special cases, for example, when pressure from one pressure system is to be built up in another pressure system, without there arising a transfer of the pressure medium, it can, however, also happen that the cylinder-piston arrangement provided for the drive of the pump is operated by a pressure medium.
In known arrangements of this type, the drive of the pistons of the pump is accomplished through an eccentric shaft and a connecting rod, the eccentric disk being driven by a crankshaft and a piston rod and, optionally by a gear by means of the piston of the cylinder-piston arrangement. The valves of the pump are pressure controlled in known arrangements of this type, or are rotary slide valves and are controlled in dependency of the position of the piston of the pump.
These known arrangements therefore have a considerable disadvantage, based on their complicated construction and, in the case of an internal combustion motor, require a starting device.
It is an object of the invention to propose an arrangement of the initially described type, which is characterized by a simple construction, and wherein a separate starting device can be dispensed with.
According to the invention, this is accomplished by the piston of the cylinder-piston arrangement being rigidly connected with at least one piston associated with a pump, and by the valves of the pump, which may be slide valves, being positively controlled, the drive of the control of the valves being a separate motor independent of the cylinder-piston arrangement.
This results in a very simple construction, wherein the very expensive balancing of the rotating eccentric masses required in the case of crankshafts and eccentric disks is dispensed with. Furthermore, the positive control of the valves of the pumps permits the use thereof for starting of the internal combustion engine, by the valves being controlled in the same manner as in normal operation, and by the pistons of the pump being operated on with a pressure medium arriving from the pressure accumulator. Discharging of the pressure medium from the pump cylinder is accomplished by the spring action of the compressed gas cushion in the cylinder of the internal combustion engine in the event ignition arises by the effect of the combustion in the cylinder of the engine. In each case, the pistons connected to one another are induced to oscillate at a frequency equal to the frequency of the positive control of the valves through operation of the pump with a pressure medium, and by control of the valves of the pump.
Due to the effect of the combustion in the cylinder of the engine, the oscillation of the piston arrangement is advanced in phase with respect to the control of the valves driven at a constant frequency, and there results a discharge of the pressure medium into the pressure accumulator, and a suction from the substantially pressureless tank.
Rotary slide valves which are driven by a ratchet belt drive or a gear drive by a separate motor provide a particularly simple structure.
According to a further feature of the invention, the control of the valves of the pump is accomplished by a common cam disk and by rams controlled thereby which results in a very simple construction in which the opposite phase position of the valves always corresponds to the predetermined values. Particularly in this solution, there cannot arise any changes in the phase position during any changes of the number of revolutions of the drive of the valve control, suc
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Cuomo Peter M.
Husar Cornelius J.
Kelman Kurt
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