CN201428540Y - Oil sprayer of closed oil inlet valve - Google Patents

Abstract

Disclosed is an oil sprayer of a closed oil inlet valve. The oil sprayer is characterized in that an upper plunger sleeve, a lower plunger sleeve and an oil cup are mounted outside a plunger; a firstoil hole is arranged in the upper plunger sleeve; a second oil hole is disposed in the lower plunger sleeve; the first oil hole and the second oil hole are communicated so as to form an oil inlet channel; the opening and closing of the oil inlet channel is controlled by a check ball; the check ball positioned inside the second oil hole is supported by a tapering sealing surface formed by the holewall of the second oil hole; a blind hole is arranged at the bottom of the upper plunger sleeve; a spring mounted in the blind hole is positioned right above the check ball; the upper end of the spring is abutted to the bottom of an inner hole of the blind hole; the lower end of the spring is abutted to the check ball. The oil sprayer of the closed oil inlet valve is capable of preventing fuel oilinside a cylinder cover oil channel from flowing into the oil cup of the oil sprayer during the stop period (especially in inclined state) of an engine, preventing the fuel oil from flowing into theoil cup during pluralities of primary rotations of engine starting and effectively lessening smoke intensity when the engine is started; accordingly, the oil sprayer has the advantages of ingenious conception, simple structure, easy application, high reliability and the like.

Description

Enclosed oiling valve oil sprayer

Technical field

The utility model relates to a kind of engine component, particularly enclosed oiling valve PT oil sprayer.

Background technique

CUMMINS mechanical type M11, NT and K Engine Series all adopt the PT oil-fired system, use the PT oil sprayer.P---refer to the fuel pressure (Pressure) of PT fuel pump output; T---refer to oil sprayer and allow fuel oil to flow into the working lipe (Time) of lubricating cup.The PT fuel pump adjusts suitable fuel pressure (P) according to the different operating modes of motor, and fuel oil flows into the lubricating cup of oil sprayer in the working lipe (T) that this operating mode is determined by oil sprayer.The circulation oil mass (Q) that flows into lubricating cup so just depends on fuel pressure (P) and flowing time (T), that is: Q ∝ P*T.Because the measuring hole of oil sprayer is through selected constant, so be PT oil-fired system.Fuel pump produces pressure fuel oil is imported fuel pipe, and fuel oil enters the fuel oil road on the cylinder cap again, flows in the oil sprayer at last.Fuel oil passes through the oil duct on the oil sprayer then earlier by the metering-orifice on the oil sprayer, and a unidirectional check ball (oiling valve) is arranged on the oil duct, and fuel oil can be pushed unidirectional check ball open under the fuel transfer pressure effect, enter lubricating cup at last.The oil sprayer plunger produces very big injection pressure and the fuel oil in the lubricating cup is pressed in the firing chamber burns under the driving of injection cam.During fuel oil in the oil sprayer plunger is pressed lubricating cup, the fuel pressure sealing of unidirectional check ball can being taken a seat prevents that fuel oil from refunding in the oil duct.

Because an all shared fuel supply line of oil sprayer and fuel feeding roads (on the cylinder cap) on the motor, promptly 6 oil sprayers are connected on the fuel feeding road, and the fuel feeding road volume that whole engine cylinder covers has 50ml at least:

1) during engine shutdown; because each cylinder plug position difference; always there are the oil sprayer lubricating cup and the fuel feeding road of 1～2 cylinder to be in on-state; be higher than the fuel oil (being no less than 50ml) in the cylinder cap fuel feeding road of lubricating cup position; can under certain pressure (gravity) effect, slightly back down check ball (oiling valve) by the oil duct of connecting; penetrate in the oil sprayer lubricating cup, even in the firing chamber.Particularly motor is parked in acclive place, and check ball can not fine sealing under action of gravity, and this situation performance is more obvious.Will spray into too much fuel oil during engine start in the firing chamber.

When 2) piloting engine, initial a few forwarding engine speeds are very low, and injection pressure is also very low, and the fuel oil that sprays into the firing chamber can not burn.

3) along with the raising of starting speed, injection pressure increases, and reaches the part fuel oil and the burning of air Mixture initial burning of ignition condition (suitable concn, temperature, pressure) in the firing chamber.

Rotating speed is very low during engine start; pressure in the firing chamber is also very low; eddy current and crowded intensity of flow are little; the mixed gas lack of homogeneity; because 1) and 2) reason; cross multiple fuel in the firing chamber; can form too much local Over-rich mixture; this part Over-rich mixture can not fire burns, partially mixed gas is directly got rid of by outlet pipe, forms more white cigarette; cracking forms soot in the high temperature of another part behind fire burns; smoke intensity is very big in the time of also can causing engine start, and for today of environmental protection pay attention to day by day, the user more and more is difficult to accept this situation.

The model utility content

Technical problem to be solved in the utility model is to provide a kind of enclosed oiling valve oil sprayer that can effectively reduce the engine start smoke intensity.

The technical solution of the utility model is as follows: a kind of enclosed oiling valve oil sprayer, the upper prop plug sleeve, lower prop plug sleeve and lubricating cup are installed in the outside of plunger, and set gradually from top to bottom, and lock by nut between the three, in the upper prop plug sleeve, offer first oilhole, offer second oilhole in the lower prop plug sleeve, described first, second oilhole is connected, form oil input channel, the switching of this oil input channel is controlled by check ball, described check ball is positioned at second oilhole, and this check ball is supported by the conical seal (contact) face that the second oilhole hole wall forms, and its key is: the bottom at described upper prop plug sleeve offers blind hole, in this blind hole spring is housed, described spring be positioned at check ball directly over, and at the bottom of the endoporus of the upper end of spring and blind hole against, the lower end of spring and described check ball against.

Adopt above technological scheme, when engine stoping operation, spring produces the active force of a 35-40kPa to check ball, this ball is pressed onto on the sealing surface, even motor (for example is parked in acclive place, it is 38 ° that the NT motor allows the angle of inclination), also can make check ball effectively be sealed into oil duct.Though the relative check ball position, fuel feeding road in the cylinder cap is in a high position, the fuel oil in the whole oil duct can produce a thrust that makes progress to check ball under pressure, is not enough to back down check ball and flows to lubricating cup under the spring force effect.

When piloting engine, under starter motor drove, engine speed had the process that progressively is increased to 150r/min from 0, in initial several commentaries on classics, engine speed is very low, and injection pressure is very little, can't burn immediately after the fuel oil in the lubricating cup is pressed into the firing chamber by plunger.Use the utility model, in initial several commentaries on classics of starting, fuel pressure is very low, also is not enough to overcome the elastic force of spring, and like this, just not having fuel oil flows into lubricating cup immediately in initial several commentaries on classics of starting, and is not being sprayed in the firing chamber under the combustion condition.

Beneficial effect: the utility model can prevent motor (particularly heeling condition) between down period; fuel oil in the cylinder cap oil duct flows to the oil sprayer lubricating cup; and initial several commentaries on classics of piloting engine; can prevent that fuel oil from entering lubricating cup; thereby reduced the smoke intensity when piloting engine effectively, had characteristics such as conception is ingenious, simple in structure, enforcement is easy, reliability height.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the scheme of installation of check ball in the utility model.

Fig. 3 is the partial enlarged drawing of Fig. 2.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

As shown in Figure 1 and Figure 2, lower prop plug sleeve 2 and lubricating cup 3 are installed successively from top to bottom in nut 5, the bottom surface of lower prop plug sleeve 2 contacts with the end face of lubricating cup 3, and the bottom of nut 5 is stretched out in the lower end of lubricating cup 3, and spacing by the step surface in nut 5 endoporus.The bottom of upper prop plug sleeve 1 is stretched in the nut 5 from top to bottom, both screw-thread fit, under the effect of nut 5, upper and lower plunger bushing 1,2 and lubricating cup 3 are fixed into an integral body, and face contacts between upper prop plug sleeve 1 and the lower prop plug sleeve 2, also is connected with pin between the two.In the endoporus of described upper prop plug sleeve 1, lower prop plug sleeve 2 and lubricating cup 3, wear plunger 4, parts such as extension bar 10, oil sprayer spring 11, spring seat 12 and locking nut 13 are equipped with in the top of this plunger 4, all adopt prior art with upper-part, its structure and annexation are not done at this and are given unnecessary details.

From Fig. 1, Fig. 2 and Fig. 3 as can be known, in upper prop plug sleeve 1, offer first oilhole 7, offer second oilhole 8 in the lower prop plug sleeve 2, described first, second oilhole 7,8 is connected, form oil input channel, the switching of this oil input channel is by check ball 6 controls, and described check ball 6 is positioned at second oilhole 8, and this check ball 6 is supported by the conical seal (contact) face that second oilhole, 8 hole walls form.The main distinction of the utility model and conventional construction is: the bottom surface at described upper prop plug sleeve 1 upwards offers blind hole, spring 9 is housed in this blind hole, described spring 9 be positioned at check ball 6 directly over, and at the bottom of the upper end of spring 9 and the endoporus of blind hole against, the lower end of spring 9 and described check ball 6 against.In the utility model, spring 9 is pressed onto check ball 6 on the sealing surface under the effect of self elastic force, even motor is parked in acclive place, and perhaps initial several commentaries on classics of engine start, can make check ball 6 effectively be sealed into oil duct, thereby play the effect that reduces the engine start smoke intensity.

Claims (1)

1, a kind of enclosed oiling valve oil sprayer, upper prop plug sleeve (1), lower prop plug sleeve (2) and lubricating cup (3) are installed in the outside of plunger (4), and set gradually from top to bottom, and lock by nut (5) between the three, in upper prop plug sleeve (1), offer first oilhole (7), offer second oilhole (8) in the lower prop plug sleeve (2), described first, second oilhole (7,8) be connected, form oil input channel, the switching of this oil input channel is controlled by check ball (6), described check ball (6) is positioned at second oilhole (8), this check ball (6) is supported by the conical seal (contact) face that second oilhole (8) hole wall forms, it is characterized in that: the bottom at described upper prop plug sleeve (1) offers blind hole, spring (9) is housed in this blind hole, described spring (9) be positioned at check ball (6) directly over, and at the bottom of the endoporus of the upper end of spring (9) and blind hole against, the lower end of spring and described check ball (6) against.

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