CN2156291Y - Gasoline engine - Google Patents

Abstract

The utility model relates to an improved gasoline engine for vehicles. A camshaft is arranged on a rocker bearing of an air valve, and the camshaft is provided with a cam for pressure reduction. An air inlet path switching valve and an operating mechanism which is corresponding to the air inlet path switching valve are arranged between a carburetor and an air inlet pipe. Any parameter of the engine does not need adjusting, and each index maintains the level of an original engine. Back pressure in a cylinder can be eliminated under an inertial slide state, and the utility model makes full use of the inertia of the vehicle to save gasoline material.

Description

Gasoline engine

The utility model relates to a kind of petrol engine.

Forbid flame-out or coasting in neutral during existing automobile downhill, because closure can not all close extremely, cylinder has back pressure to exist in compression stroke, and internal drag is very big when coast, and the generation dynamic braking consumes oil plant simultaneously.

The purpose of this utility model provides a kind of petrol engine, can eliminate the back pressure in the cylinder effectively.When not needing motor to produce power, can under the prerequisite that does not consume gasoline, make full use of automobile inertial, increase coasting distance, when the needs motor produces power, can make the motor proper functioning.Power and moment of torsion that output is demarcated reach the purpose of fuel-economizing and can improve average operating speed.

The utility model proposes a kind of petrol engine, comprise cylinder, piston, distribution device, oil supply and inlet and exhaust system.Wherein, decompressor is being housed on the air distributing device, gas-entered passageway changing valve and coupled operating mechanism are being housed between Carburetor and suction tude.Described decompressor is made up of cam, camshaft and valve pitman arm shaft bearing, and described gas-entered passageway changing valve is made up of bypass tube, spool, spring, operating handle and housing.Bypass tube is connected between the gas channel mouth of air-strainer and housing one end, and the other end gas channel mouth of housing is connected between suction tude and the Carburetor.

Petrol engine of the present utility model has two kinds of coast working staties: when automobile when flat pavement running reaches certain speed or travel on the downhill path, the decompressor cam backs down intake valve, the gas-entered passageway changing valve is opened simultaneously, air stream does not pass through Carburetor through bypass tube, in this state, intake valve is often opened in the engine running, and the gas in the cylinder is discharged from cylinder and can not form back pressure when piston stroking upward.An air part of discharging cylinder enters atmosphere through outlet pipe, and a part is sucked in suction stroke by other cylinder, so repeatedly circulation.Under the vehicle inertia effect, power train drives motor and does no back pressure running, and motor does not consume gasoline, and automobile is coast and travels.

When automobile in travelling in level road or downhill path, meeting the road surface has under the little condition of coefficient of attachment such as sleet, mire, needs to slow down or during parking auxiliary braking, decompressor is failure to actuate, the gas-entered passageway changing valve is opened, air does not pass through Carburetor.Under this state, the unlatching of intake valve or close and controlled by distribution device.Invention is moved in this operating mode running, because of Carburetor by short circuit, so enter in the cylinder is not non-consume fuel of inflammable mixture, and do not move because of decompressor, the airtight generation back pressure of cylinder, utilize the stagnant inhibition effect of motor, automobile is Reduced Speed Now, can control the sideslip phenomenon effectively and produce.

Advantage of the present utility model is as long as decompressor is failure to actuate, to close the gas-entered passageway changing valve when the needs engine power, just can make the motor proper functioning, and economic and technical norms such as power, moment of torsion, fuel consumption keep former machine level.When not needing motor to produce power, can not consume the preceding pressure-raising of gasoline, make full use of automobile inertial, increase coasting distance, receive the effect of getting twice the result with half the effort.

Forbid the clause of flame-out or coasting in neutral when meeting the fixed automobile downhill of traffic law, in use, do not step on the pedal of clutch, need not pluck shelves, can guarantee the air pressure of braking system, as long as handle decompressor and gas-entered passageway changing valve, automobile driving speed can be controlled in the safety range, and transition garden cunning do not have impact load.

Oil-saving effect is good, in the sliding fuel saving ratio maximum 30% of level road inertia.There is downward component effect inertia traveling fuel saving ratio to reach 100% during descending.

During work, motor is discharged the corresponding minimizing of harmful components in the gas.Simple in structure, reforming cost is low, does not need regular maintaining, and is good in economic efficiency.

Fig. 1 is the petrolic a kind of working state schematic representation of the utility model;

Fig. 2 is the petrolic another kind of working state schematic representation of the utility model;

Numeral among the figure: 1 cylinder, 2 connecting rods, 3 pistons, 4 air distributing devices, 5 spark plugs, 6 suction tude, 7 bypass tubes, 8 spools, 9 springs, 10 operating handles, 11 gas-entered passageway changing valve housings, 12 air-strainer, 13 Carburetors, 14 closures, 15 cams, 16 camshafts, 17 valve rocker shaft stools, 18 rocking arms, 19 push rods.

Embodiment:

The saving gasoline through freewheeling device of installing on overhead valve distribution device petrol engine of the present utility model has been shown among Fig. 1,2.At valve rocker shaft stool (17) camshaft (16) go up to be installed, on decompressor is arranged with cam (15).The air inlet channel switching valve is installed between Carburetor (13) and suction tude (6).Its cam (15) is fixed on the camshaft (16) with staying spiral shell.This device is used for the high 16mm in firing chamber, and cam lift 12.5mm is under the valve spring power 40Kg situation.Cam (15) gabarit is circular, with camshaft (16) centre distance skew 5mm, also can adopt the cam of other shape.The gas-entered passageway changing valve adopts cylindrical spool (8), also can adopt other spool such as cone valve.Spring (9) is when being in extended position, and as shown in phantom in Figure 2, spool (8) seals the changing valve gas-entered passageway.Spring (9) is when being in compression position, and shown in solid line among Fig. 1,2, spool (8) is opened the changing valve gas-entered passageway.

Claims (3)

1, a kind of petrol engine, comprise cylinder, piston, distribution device, oil supply and inlet and exhaust system, it is characterized in that decompressor is housed on the air distributing device (4), between Carburetor (13) and suction tude (6), be equipped with the gas-entered passageway changing valve and with its operating mechanism that connects, described decompressor is made up of cam (15), camshaft (16) and valve lever pin bearing (17); Described gas-entered passageway changing valve, form by bypass tube (7), spool (8), spring (9), operating handle (10) and housing (11), bypass tube (7) is connected between the gas channel mouth of air-strainer (12) and housing (11) one ends, and the other end gas channel mouth of housing (11) is connected between suction tude (6) and the Carburetor (13).

2, a kind of petrol engine described in claim 1 is characterized in that its cam (15) gabarit for circular, the center of its misalignment camshaft (16).

3, a kind of petrol engine described in claim 1 is characterized in that described gas-entered passageway changing valve spool (8) is a sleeve valve.

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