CN1168892C

CN1168892C - Two-stroke internal combustion engine

Info

Publication number: CN1168892C
Application number: CNB981055362A
Authority: CN
Inventors: 大城健史; 夫; 矢崎昭夫; 司; 天野雅司
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 1997-05-21
Filing date: 1998-03-12
Publication date: 2004-09-29
Anticipated expiration: 2018-03-12
Also published as: ITTO980407A1; TW363110B; CN1199812A; JPH10317984A

Abstract

A two-cycle crosshead engine, in which the mixture of compressed air from an air chamber 94 and fuel from a fuel injection device 13 is supplied to a combustion chamber 96 through a rotary valve 74. A fuel pump, a water pump and other accessories 12,14,76, and the shaft of the rotary valve 74 rotationally moved by a crankshaft 21, accessories 12,14,76 are fitted on the shaft of the rotary valve 74. The special shaft and axletree of accessories, the number of parts and weight are reduced by fitting accessories to the shaft of a rotary valve.

Description

Two stroke IC engine

Technical field

The present invention relates to a kind of two stroke IC engine of improvement.

Background technique

Aspect the configuration of the subsidiary engine of motor, for example adopted: (1) is real opens clear 62-79912 communique " engine oil pump drive ", and (2) spy opens 54 No. 22 communiques of flat 2-24 " auxiliary machine mounting structure of motor " in the past.

Above-mentioned technology (1) promptly by elastomeric objects, is installed oil pump in gearbox casing, shown in first figure of same communique, and the oil pump 13 of clearly expressing bent axle 1 and disposing in the outside, bent axle 1 end.

Above-mentioned technology (2) promptly causes motor mechanism small-sized the time, obtained the device of the structure that can add a cover simply, shown in the 2nd figure of same communique, the pump shaft 21 of clearly expressing bent axle 5 and driving, and the water pump 17 that constitutes of pump shaft 21 and be connected oil pump 26 on the pump shaft 21 thus by bent axle 5.

In above-mentioned (1), because for configuration oil pump 13 on the projecting shaft of bent axle 1, so motor has overall width to become big deficiency.

As for above-mentioned (2), for example, pressurized air that will come out from 2 chambers and the fuel mix of coming out from fuel injection system are when supplying with firing chamber by rotary valve with this mixed gas, except that the axle and bearing of water pump 17 and oil pump 26, also have to be provided with the axle and the bearing of rotary valve.

Summary of the invention

Therefore, the purpose of this invention is to provide a kind of motor overall width that neither makes and increase, but the two stroke IC engine of subsidiary engine axle such as dual-purpose water pump and oil pump and rotary valve shaft again.

In order to achieve the above object, first scheme of the present invention proposes: the gained material is supplied with the firing chamber after pressurized air that will come out from chamber by rotary valve and the fuel mix of coming out from fuel injection system, rely on the rotation of bent axle to drive in the two stroke IC engine of axle of subsidiary engine such as oil pump, water pump and rotary valve, on the axle of rotary valve, the subsidiary engine class is installed.

Owing to the subsidiary engine class is installed on the axle of rotary valve, not only can save the number of components of the special axis of subsidiary engine and bearing, minimizing motor, can also light.

A kind of two stroke IC engine of the present invention, pass through rotary valve, the gained material is supplied with the firing chamber after pressurized air that will come out from chamber and the fuel mix of coming out from fuel injection system, rely on crankshaft rotating to drive the axle of subsidiary engine and above-mentioned rotary valve, it is characterized in that: above-mentioned subsidiary engine is installed on the axle of above-mentioned rotary valve.

Alternative plan of the present invention proposes: the gained material is supplied with the firing chamber after pressurized air that will come out from chamber by rotary valve and the fuel mix of coming out from fuel injection system, by idler shaft and belt or chain, drive by crankshaft rotating in the two stroke IC engine of axle of subsidiary engine class such as oil pump, water pump and rotary valve, the subsidiary engine class is installed on idler shaft.

Because subsidiary engine is installed on the idler shaft, not only can save the special axis and the bearing of subsidiary engine, reduce the number of components of motor, can also light.

A kind of two stroke IC engine of the present invention, pass through rotary valve, the gained material is supplied with the firing chamber after pressurized air that will come out from chamber and the fuel mix of coming out from fuel injection system, by idler shaft and belt or chain, by bent axle the axle of subsidiary engine and above-mentioned rotary valve is rotated, it is characterized in that: above-mentioned subsidiary engine is installed on the above-mentioned idler shaft.

Description of drawings

Fig. 1 is the side view of motorcycle power plant of the present invention.

Fig. 2 is the sectional drawing along the 2-2 line of Fig. 1.

Fig. 3 is the sectional drawing along the 3-3 line of Fig. 1.

Fig. 4 is shown in Figure 3 beginning to the side view of the rotation bang path of rotary valve from bent axle.

Fig. 5 is the sectional drawing by cylinder axis of the present invention.

Fig. 6 is the sectional drawing along the 6-6 line of Fig. 1.

Fig. 7 is the side view of other example of two stroke IC engine of the present invention.

Embodiment

Below by figure explanation example of the present invention.

Fig. 1 is and the side view of relevant motorcycle power plant of the present invention that power plant 1 are made of with the stepless speed changing type variable-speed motor 3 that links to each other with output power one side of motor 2 motor 2.

This figure is a structure of not being with the variable-speed motor 3 of cabinet.

In this figure, 11 is spark plug, 12 is water pump, the 13rd, combustion injection valve, the 14th, oil pump, the 15th, throttling arrangement, the 16th, starting motor, the 17th, the small gear that can axially advance and retreat, the 18th, the ring gear that can be meshed with small gear 17, the 21st, the bent axle of installing ring generating gear 18,22, the 23rd, with the position of vehicle frame installation, the the 31st and the transmission case that becomes one of the crank box of motor, the 32nd, from bent axle 21 by the rotating driven shaft of vee-belt transmission that does not indicate the figure, the 33rd, realize from bent axle 21 to driven shaft the clutch of 32 interrupted rotation.

Fig. 2 is the 2-2 line sectional drawing of Fig. 1, the composition of motor 2 comprises: with two

crank boxs

25,26 about bearing 24,24 support bent axles 21, the driving wheel 27 that is provided with in the end of an end of bent axle 21, along the axle direction of driving wheel 27 starting arrangement 28 in its outer installment, end at crankshaft 21 the other ends is arranged on alternator 41, the slit disk of installing in the outside of this alternator 41 42, and the crank angle sensor 43 that from the slit of slit disk 42, detects crankangle.

In addition, the composition of motor 2 also comprises: be connected connecting rod 46 on the bent axle 21 by crankpin 45, be connected piston 48 on this connecting rod 46 by wrist pin 47, be furnished with in cylinder 49 the slidably cylinder body 51 of piston 48, and the cylinder cap of installing in the end of this cylinder block 51 52.

Wherein, 21a, 21b are counterweights, and 21c is the gear that oil pump drives usefulness, the 53rd, be furnished with the oil pump shaft of worm and gear device, the 54th and ring gear 18 constitute the movable half-pulley of driving wheel 27 together, the 55th, be fixed on the plate on the bent axle 21, the 56th, the weight that the dependence centrifugal force that is provided with between movable half-pulley 54 and plate 55 moves radially it, 57 is vee-belt, 58,58 is oil sealing, and 61,62 is needle bearing, the 63, the 64th, and scavenge port, 65 is water jacket, and 66 is cooling-water temperature sensor.

Fig. 3 is the 3-3 line sectional drawing of Fig. 1, and illustrate on the one hand: actuation gear 68 is installed on the bent axle 21, and boundary's wheel 71 is meshed with actuation gear 68 in making, middle boundary wheel 71 spool the end drive pulley 72 is set; Illustrate on the other hand: can be supported on rotary valve 74 on the cylinder body 51 rotatably with

bearing

73,73, water pump 12 and driven pulley 75 are installed in end at an end of this rotary valve 74, petrolift 76 is installed in the other end of rotary valve 74, connects above-mentioned drive pulley 72 and driven pulley 75 with cingulum 77; In addition, the 78th, needle bearing, the 83rd, oil sealing, the 84th, sealing component.

Based on above structure, rotary valve 74 reverses with respect to bent axle 21 gyratory directions.

Like this,, reduce the number of components of motor 2 (referring to Fig. 2) owing on the axle that will be installed in rotary valve 74, not only can save the special axis and the bearing of water pump 12 and petrolift 76 as the water pump 12 and the petrolift 76 of subsidiary engine, can also light.

And motor 2 not only can miniaturization, and the spaces in the motor 2 can also effectively utilize.

Fig. 4 is the side view of the rotation bang path from the bent axle to the rotary valve shown in Fig. 3, loose pulley 85 is shown contacts with the cingulum 77 that is connected drive pulley 72 and driven pulley 75; In addition, the 86th, the installation component of loose pulley 85.

By means of loose pulley 85, prevent that cingulum 77 is in the state of touching in the high speed rotating scope.

Fig. 5 is relevant sectional arrangement drawing by cylinder axis of the present invention, be illustrated in the middle contiguous crankshaft room of crank box 25,26 (26 omit) 87 ingress needle spring plate valve 88,91 is set, at the provided upstream posting port manifold 92 of this needle spring plate valve 88,91, throttling arrangement 15 is set in the upstream of this inlet slope pipe 92; In addition, 93 is scavenge port.

In addition, Fig. 5 also is illustrated in the chamber 94 that storing compressed air is set between cylinder body 51 and the cylinder cap 52, by rotary valve 74, the gained material is by being the rich mixture jetburner 95 supply firing chambers 96 of open shape gradually after pressurized air that will come out from chamber 94 and the fuel mix of coming out from Fuelinjection nozzle 13, and the ingress of the relief opening 97 of gas is provided with outlet valve 98 after the discharging burning.

Fig. 6 is the 6-6 line sectional drawing of Fig. 1, rich mixture jetburner 95 is shown is open gradually shape along the cylinder axis Vertical direction.

Like this, because rich mixture jetburner 95 is open gradually shape along the cylinder axis Vertical direction with along the cylinder axis direction that marks shown in Figure 5, make the fuel that comes out in rich mixture jetburner 95, fiercely to spray from rotary valve 74 be coniform expansion substantially.Therefore, smoothly spread, be attached to wall hardly, can promote fuel atomization and than perfect combustion along the wall of the open gradually shape of rich mixture jetburner 95.

So, can reduce burning fee with and improve exhaust purification performance.

Wherein, the 99, the 99th, the pressurized air path promptly makes pressurized air circulate in chamber 94 from cylinder 49 by rotary valve 74.

The function of the rotary valve 74 shown in Fig. 5 comprises: (a) switch of 94 pressurized air path from cylinder 49 to chamber, (b) switch from chamber 94 and Fuelinjection nozzle 13 to the rich mixture path of rich mixture jetburner 95.

Above-mentioned (a) is promptly by pressurized air path 99,99 (with reference to Fig. 6), make the air that in compression stroke, compresses enter chamber 94 from cylinder 49, at this moment rotary valve 74 open valve timing and piston 48 from lower dead center rise, compression stroke begins to be synchronization, close valve timing and be (b) illustrated moment after combustion jet stops from combustion injection valve 13.

Above-mentioned (b) is about to the pressurized air that stores in the chamber 94 and the fuel that comes out from combustion injection valve 13 sprays by rich mixture injection valve 95 together, at this moment rotary valve 74 to open valve timing be piston 48 from lower dead center rise, piston 48 upper ends close the moment behind the scavenge port 93, close valve timing and be the moment behind the quantitative fuel of the intact institute of injection.

Fig. 7 is the side view that other example of relevant two stroke IC engine of the present invention is shown.For with Fig. 1～Fig. 6 in the form of the enforcement that illustrated be the prosign of giving of same composed component, detailed.

Motor 101 is promptly: rotatable bent axle 21 is set on the crankcase 102 of double as transmission case, on this bent axle 21, drive pulley 103 is set, cylinder body 104 is set in the crankcase 102, rotatable rotary valve 74 is set on this cylinder body 104, on this rotary valve 74, driven pulley 75 is set, cylinder cap 105 is set on the cylinder body 104, rotatable idler shaft 106 is set on this cylinder cap 105, on this idler shaft 106, water pump is set, oil pump, subsidiary engine classes such as petrolift (not having diagram) and loose pulley 107 are at drive pulley 103, be connected the belt 108 that all there is tooth on the two sides on driven pulley 75 and the loose pulley 107.

Rely on and use the above-mentioned belt 108 that tooth is arranged, can make rotary valve 74 relative bent axle 21 counter-rotatings.

Like this,, not only can save the special axis and the bearing of subsidiary engine class, reduce the number of components of motor 101 because the subsidiary engine class is installed on the idler shaft 106, can also light.

The present invention will bring into play following effect owing to adopt above-mentioned structure:

Because the subsidiary engine class is installed on the rotary valve shaft, not only can save the number of components of the special axis of subsidiary engine and bearing, minimizing motor at the described two stroke IC engine of first scheme, can also light.

Because the subsidiary engine class is installed on the idler shaft, not only can save the special axis and the bearing of subsidiary engine class at the described two stroke IC engine of alternative plan, reduce the number of components of motor, can also light.

Claims

1. two stroke IC engine, pass through rotary valve, the gained material is supplied with the firing chamber after pressurized air that will come out from chamber and the fuel mix of coming out from fuel injection system, rely on crankshaft rotating to drive the axle of subsidiary engine and above-mentioned rotary valve, it is characterized in that: above-mentioned subsidiary engine is installed on the axle of above-mentioned rotary valve.

2. two stroke IC engine, pass through rotary valve, the gained material is supplied with the firing chamber after pressurized air that will come out from chamber and the fuel mix of coming out from fuel injection system, by idler shaft and belt or chain, by bent axle the axle of subsidiary engine and above-mentioned rotary valve is rotated, it is characterized in that: above-mentioned subsidiary engine is installed on the above-mentioned idler shaft.

3. two stroke IC engine as claimed in claim 1 is characterized in that: described subsidiary engine is oil pump or water pump.

4. two stroke IC engine as claimed in claim 3 is characterized in that: described subsidiary engine is oil pump or water pump.