SU1281706A1 - Vehicle power plant - Google Patents

Abstract

This invention relates to the automatic regulation of internal combustion engines. The aim of the invention is to improve economy by expanding the range of engine operation. Engine 1 is connected to transgia 2. The device 4 for turning off the cylinders is connected to the pressure line 10 of the oil pump 11 by the connecting pipe 9. In the latter, shut-off valves are installed.

Description

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13 and 19 with an electromagnetic drive connected by an electrical circuit to the contacts of the pressure relay 25 and the rotational frequency converter 26. After starting the engine 1 include the mechanism 27 start. The check valve 30 is closed. The oil from the cavities of the shut-off device flows into the crankcase through the gaps of the hydropushers that are turned off, shut off 81706

part of the cylinder. When the pump 17 is turned on, the locking bodies 13 and 19 are opened and idle is switched on. Still cylinders. With a further increase in the rotation frequency p, and the boost pressure P according to the signal of the pressure relay 25, the locking member 19 closes, part of the cylinders is turned off, and the engine. works in economy mode. 2 Il.

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This invention relates to the automatic regulation of internal combustion engines.

The purpose of the invention is to improve viscosity by expanding the range of engine operation with cylinder deactivation.

FIG. 1 shows a diagram of the power plant; in fig. 2 shows the dependence of the power of the engine N on the rotational speed LU.

Engine 1 (FIG. 1) is connected to the transmission 2 of the vehicle’s hydraulic transmission using a friction clutch 3.

The engine contains a cylinder shutdown device 4 which includes: a fuel shutdown mechanism 5, a gas exchange shutdown mechanism 6 with switchable hydraulic taps, a regulator correction mechanism 7 that eliminates a jump in the engine crankshaft frequency during changes in the number of operating cylinders, an anti-surge valve 8, eliminating the occurrence of compressor surge when a part of the cylinders is turned off. The cylinder shutdown device 4 is connected by pipe 9 to the pressure line 10 of the oil pump 11 of the lubrication system installed in the oil pan 12 of the engine. In the pipe 9, a shut-off valve is installed — a two-position spool 13, one end of the supply cavity of which is connected by the main 14 to the main main 10 and the other by the main 15 to the main 16 of the pump

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17 transmissions 2 installed in the crankcase 18 transmissions ..

In the pipe 9 between the spool 13 and the cylinder-deactivating device 4 an additional shut-off element is installed — a two-position solenoid valve 19, in the supply circuits 20 of electromagnets of which electrical contacts 21 are installed — 24 is a pressure relay 25 (contacts 23 and 24), the working cavity of which is connected to suction (not shown) and converter 26 (pins 21 and 22) of the rotational speed of the crankshaft into an electrical signal kinematically connected to the crankshaft (not shown). The electromagnets are powered from mule is a secondary battery.

The start mechanism 27 (starting gasoline engine) is kinematically connected with the oil pump 28 of the pre-start oil pumping, which is connected by the line 29 via the check valve 30 to the cylinder deactivation mechanism 5 and the line 31, via the check valve 32 to the pressure line 10.

The pressure switch 25 is made in the form of a sensing element of the charge pressure RK (diaphragm, bellows) with a rod closing two pairs of contacts 23 and 24.

The crankshaft rotation frequency converter 26 is made in the form of a centrifugal sensing element with ball weights and a movable element (a conical plate), closing two pairs of contacts 21 and 22. The centrifugal sensitive element is connected to the shaft of the fuel pump regulator.

The position of the valve bodies of the locking bodies in the diagram corresponds to the time of the engine idling with the cylinders off. Charge pressure Р „corresponds to moments

the switching on of all cylinders when the electrical contact 24 of the pressure relay 25 is closed (Fig. 1); charge pressure P corresponds to the moment of shutdown of a part of the cylinders when the electrical contact 23 of the pressure relay 25 is closed (Fig. 1); The rotational frequency h of the crankshaft corresponds to the moment of switching on a part of the cylinders when the electrical contact 21 of the rotational frequency converter 26 is closed (Fig. 1); The rotational speed n of the crankshaft corresponds to the moment of the shutdown of a part of the cylinders when the electrical contact 22 of the rotational frequency converter 26 is closed (Fig. 1).

pin 22 is closed and, the boost does not exceed the value of t |, then the corresponding contact of the relay for closure is closed and the electromagnet switches the spool of the additional locking member 19 to the Closed position. The cylinder is switched off from operation and the gatella switches to operation with curve B power ( Fig. 2). Engine 1 operates on three cylinders in a shaded economic range.

The power plant works as follows in zone 25 (FIG. 2) for as long as

shimm way.

At start-up, a start-up mechanism 27 is turned on, which drives the pump 28 of the pre-starting oil pumping, which, on lines 29 and 31 (opening the check valves 30 and .32), fills the engine lubrication system and the working cavities of the fuel supply mechanisms 5 and gas exchange with oil 6, the regulator adjustment mechanism 7 and anti-surge valve 8. The engine starts on all six cylinders, for example, and operates according to the power Ng in curve A (Fig. 2).

After start-up, the start-up mechanism 27 is turned off, the pump 28 of the pre-pumping of oil stops accordingly, and the check valve 30 is closed. Oil from the working cavities of the shutdown device 4 flows into the cavity of the oil casing 12 through gaps in the hydraulic taps and three parts of the cylinders are turned off.

When the clutch clutch 3 is turned on, the oil pump 17 of the transmission 2 starts to work, the pressurized oil enters the face cavity of the spool-valve 13 under pressure 15 and moves it to the Open position. The spool 13 informs the device 4 shutdown of cylinders with a pressure line 10 and, since 35

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boost pressure will not increase to face P or rotation frequency will not decrease to the value of p.

In the first case, closes the ele

30 tric contact 24 of pressure relay 25, in the second case, the electrical contact 21 of the frequency converter 26 is closed. When the contacts 21 or 24 are closed, the electromagnet of the additional locking member 19 is activated and switches its spool to the Open position, thereby ensuring that all cylinders are activated.

When the vehicle stops, the clutch for the three missions 2 is turned off, the oil on the gearbox 17 of the transmission 2 is turned off, and the valve 13 of the valve is moved

45 oil from the engine lubrication pump 11 to the closed position. T engine cylinders are shut down.

50 the use of the proposed powerplant allows automatic switching of the number of working cylinders when the engine is idling without participation

55 of the operator and, in addition, automatic switching of the number of working cylinders during engine operation under load from the steady-state rotation frequency. Due to this increase

The spool valve of the additional valve body 19 is also in the position Open, the shut-off, 1x cylinders, i.e. the vehicle starts moving on all cylinders. When the rotation frequency reaches the value of h (the starting point of the transport range), the rotational frequency converter 26 opens the electrical contact 21 (Fig. 1 and 2). With further acceleration to a frequency of n for

if pressure

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contact 22 closes and, the charge does not exceed the value t |, then the corresponding contact of the pressure switch is closed and the electromagnet of the additional valve 19 switching valve is triggered to the Closed position. Three cylinders of work are turned off and the engine switches to operation with power according to curve B (FIG 2). Engine 1 runs on three cylinders in the shaded economical range B (Fig. 2) for as long as

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the boost pressure will not increase to the value of P or the rotation frequency will not decrease to the value of p.

In the first case, the electrical contact 24 of the pressure relay 25 is closed, in the second case, the electrical contact 21 of the frequency converter 26 is closed. When the contacts 21 or 24 are closed, the electromagnet of the additional locking member 19 is activated and switches its spool to the Open position, thereby ensuring that all cylinders are activated.

When the vehicle is stopped, the clutch of the transmission 2 is turned off, the oil pump 17 of the transmission 2 is turned off and the valve body 13 is moved by the oil pressure from the lubrication pump 11. engine in the closed position. Three engine cylinders are shut down.

0 the use of the proposed power plant allows the automatic switching of the number of working cylinders when the engine is idling without participation

5 operators and additionally automatic switching of the number of working cylinders when the engine is running under load at a steady speed. Due to this increase

engine operating efficiency.

Claims (1)

Invention Formula Force installation of transport means containing an internal combustion engine and a transmission with hydraulic transmission, a hydraulic mechanism for shutting off fuel supply to a group of cylinders of an engine at idling, associated with the pressure line of the engine's oil pump using a connecting pipe, switchable hydropushers connected to the same main line a shut-off member of the same cylinders, the shut-off member made in the form of a spool with two end feed cavities, one of which is connected to the pressure line and the other with ornoy highway gidroperedaf1i ((Z2l (rig 2. transmissions, and the engine start mechanism with an oil pump, which is connected through a non-return valve to the fuel supply shut-off mechanism, so that, in order to increase efficiency by extending the engine operating range, c. switching off the cylinders, the engine is equipped with an additional valve body with an electromagnetic drive, a pressure switch in the engine suction pipe, equipped with contacts, and a converter of the engine shaft rotation frequency into an electric signal, the additional valve body installed in the connecting pipe and its electromagnetic actuator circuits with pressure switch and speed converter contacts. (2) 23) fid