CN1313716C

CN1313716C - Air inlet device for staight jet engine

Info

Publication number: CN1313716C
Application number: CNB2004100309346A
Authority: CN
Inventors: 铃木正刚; 齐藤则夫
Original assignee: Honda Motor Co Ltd
Current assignee: Australia & Macau Ltd; Honda Technology & Research Industrial Corporation
Priority date: 2003-03-31
Filing date: 2004-03-30
Publication date: 2007-05-02
Anticipated expiration: 2024-03-30
Also published as: TW200424433A; JP2004301050A; JP4167524B2; CN1534177A; TWI244526B

Abstract

In an air intake apparatus of a direct-injection engine in which an injector for injecting fuel directly into a combustion chamber by an amount corresponding to the amount of rotation of the throttle valve is disposed via an air intake pipe, non-linear relation between the amount of rotation of the throttle valve and the amount of intake air is achieved in a simple structure, so that reduction in fuel consumption in the area of low load and low rotation of an engine is achieved. An air intake port 23 is formed to have an opening area required and sufficient for sucking the amount of air required for the maximum output of the engine, and an air intake passage 142 of a throttle body device 140 is formed to have an opening area required for sacking the amount of air required for the maximum output of the engine in a state in which a plate-shaped throttle valve 145 that can rotate from the fully-closed position to the fully-opened position is located at the midpoint between the fully-closed position and the fully-opened position.

Description

The direct fuel-injection engine air inlet system

Technical field

The present invention relates to a kind of Throttle valve device is connected to the suction port on the cylinder head by suction tude direct fuel-injection engine air inlet system, described Throttle valve device comprises the body with inlet air pathway, the above-mentioned inlet air pathway of crosscut and can be supported on throttle spindle on the described body rotationally, regulate above-mentioned inlet air pathway opening area and be fixed on throttle valve on the above-mentioned throttle spindle, throttle valve cylinder on the end of external stability at described throttle spindle of above-mentioned body, and the throttle valve cable is intertwined and connected on described throttle valve cylinder, and the nozzle that the amount of the fuel of the amounts of rotation of the above-mentioned throttle valve of correspondence is directly injected in the firing chamber is arranged on the described cylinder head.

Background technique

At present, be arranged on the direct fuel-injection engine on the vehicle, because vehicle operators is with the fuel quantity of corresponding accelerator pedal or throttle valve clamp operation amount, be directly injected to fuel quantity in the firing chamber from being arranged on nozzle on the cylinder head exactly, when engine low load, when slowly running, when carrying out motor output control so that reducing fuel cost by dilute combustion, accelerator pedal or throttle valve clamp operation amount are non-linear corresponding between the air inflow of amounts of rotation and motor of throttle valve.

Owing to non-linear relation occurs between the amounts of rotation of throttle valve and the air inflow of motor, in the engine intake duct of the illustrated non-direct fuel-injection engine of Japanese documentation 1, throttle valve and other control valve are arranged in the gas handling system, utilize ECU to control the aperture of this control valve.Patent documentation 1 spy opens flat 11-107788 communique

By patent documentation 1 described technology is applied on the direct fuel-injection engine, non-linear relation appears between the amounts of rotation of throttle valve and the air inflow of motor, though when engine low load, when slowly running, can carry out dilute combustion and reduce fuel cost, but need on throttle valve, add control valve by ECU control, when increasing number of components, make complex structure.

Summary of the invention

Propose the present invention in view of the above problems, purpose provides a kind of direct fuel-injection engine air inlet system, makes with simple structure between the air inflow of the amounts of rotation of throttle valve and motor to non-linear, when engine low load, when slowly running, can reduce fuel cost.

To achieve these goals, in the invention that first aspect present invention is put down in writing, in the direct fuel-injection engine air inlet system on the suction port that Throttle valve device is connected to cylinder head by suction tude, described Throttle valve device comprises the body with inlet air pathway, the above-mentioned inlet air pathway of crosscut and can be supported on throttle spindle on the described body rotationally, regulate above-mentioned inlet air pathway opening area and be fixed on throttle valve on the above-mentioned throttle spindle, throttle valve cylinder on the end of external stability at described throttle spindle of above-mentioned body, and the throttle valve cable is intertwined and connected on described throttle valve cylinder, the nozzle that the amount of the fuel of the amounts of rotation of the above-mentioned throttle valve of correspondence is directly injected in the firing chamber is arranged on the described cylinder head, it is characterized in that: described suction port forms has the opening area that can suck necessary air quantity when motor is maximum to be exported, the inlet air pathway of described Throttle valve device forms has such opening area, promptly the tabular throttle valve that rotates to fully open position from full close position is under the state in the neutral position between full close position and the fully open position, necessary air quantity in the time of can sucking the maximum output of above-mentioned motor.

Structure according to invention that first aspect present invention is put down in writing, in open side to greatest extent before the rotary throttle valve, the opening area of inlet air pathway becomes following size in Throttle valve device, promptly must be able to make necessary air ventilation when the maximum output of motor, change from the corresponding throttle valve amounts of rotation of fuel quantity of nozzle ejection, the opening area of inlet air pathway can become non-linear in the amounts of rotation of throttle valve and the Throttle valve device thus.The operation of utilization by cheap throttle valve cable makes the simple structure of the Throttle valve device that throttle valve rotates, and the amounts of rotation and the pass between the air inflow of throttle valve are non-linear, can reduce the low fuel cost of rotating the territory of engine low load.

In the invention that second aspect present invention is put down in writing, on the invention of first aspect present invention record, the interior shape shape of above-mentioned suction tude is can be with in succession the taper glossily of the inlet air pathway of described Throttle valve device and suction port.According to this structure, the induction air flow ratio till from the inlet air pathway of Throttle valve device to suction port changes glossily, can more stably control the output of motor.

In the invention that third aspect present invention is put down in writing, on the invention of first aspect present invention or second aspect record, the amounts of rotation of the corresponding throttle valve of nozzle will be directly injected in the firing chamber by the mixed gas that fuel and air are formed and be arranged on the cylinder block.According to this structure, under tiny flow quantity fuel atomizing good, designs simplification can further be reduced in the fuel cost under low-load, the slow-speed of revolution.

First invention of being put down in writing according to the present invention, utilization makes the simple structure of the Throttle valve device of throttle valve rotation by the operation of cheap throttle valve cable, the amounts of rotation and the pass between the air inflow of throttle valve are non-linear, can reduce the low fuel cost of rotating the territory of engine low load.

Second invention of being put down in writing according to the present invention, the induction air flow ratio till from the inlet air pathway of Throttle valve device to suction port changes glossily, can more stably control the output of motor.

The 3rd invention of being put down in writing according to the present invention, under tiny flow quantity fuel atomizing good, designs simplification can further be reduced in the fuel cost under low-load, the slow-speed of revolution.

Description of drawings

Fig. 1 is the sectional arrangement drawing of a motor part.

Fig. 2 shows the dismounting figure that sees along 2-2 line among Fig. 1 of the state behind the top cover down.

Fig. 3 is the sectional drawing along 3-3 line among Fig. 2.

Fig. 4 is the sectional drawing along 4-4 line among Fig. 3.

Fig. 5 is the sectional drawing along 5-5 line among Fig. 2.

Fig. 6 is the sectional drawing along 6-6 line among Fig. 5.

Fig. 7 is the sectional drawing along 7-7 line among Fig. 5.

Fig. 8 is the sectional drawing along 8-8 line among Fig. 2.

Fig. 9 is the figure that shows throttle valve amounts of rotation and air inflow relation.

Symbol description: 14 cylinder heads; 19 firing chambers; 23 suction ports; 25 nozzles; 140 Throttle valve devices; 141 suction tude; 142 inlet air pathways; 143 bodies; 144 stream valve shafts; 145 throttle valve; 146 throttle valve cylinders; 147 throttle valve cables.

Embodiment

Below based on one embodiment of the invention shown in the drawings embodiment of the present invention is described.

Fig. 1～Fig. 9 has shown one embodiment of the present of invention, Fig. 1 is the sectional arrangement drawing of a motor part, Fig. 2 shows the dismounting figure that sees along 2-2 line among Fig. 1 of the state behind the top cover down, Fig. 3 is the sectional drawing of being done along 3-3 line among Fig. 2, Fig. 4 is the sectional drawing of being done along 4-4 line among Fig. 3, Fig. 5 is the sectional drawing of being done along 5-5 line among Fig. 2, Fig. 6 is the sectional drawing of being done along 6-6 line among Fig. 5, Fig. 7 is the sectional drawing of being done along 7-7 line among Fig. 5, Fig. 8 is the sectional drawing of being done along 8-8 line among Fig. 2, and Fig. 9 is the figure that shows throttle valve amounts of rotation and air inflow relation.

At first in Fig. 1, Top put valve type 4 stroke water-cooleds be single cylinder direct fuel-injection engine body 11 comprise crankcase 12, be combined in cylinder block 13 on this crankcase 12, relative with crankcase 12 and be combined on the cylinder block 13 cylinder head 14 and with cylinder block 13 relatively and be combined in top cover 15 on the cylinder head 14, and adopt make cylinder head 14 a little upwards forward posture be installed on the vehicle such as motorcycle.

With reference to Fig. 2～Fig. 4, the piston 17 that is entrenched in slidably in the cylinder bore 16 that is arranged on the cylinder block 13 is connected (with reference to Fig. 1) on the crankshaft 10 by connecting rod 18 and crankpin (not shown), and crankshaft 10 is supported on the crankcase 12 free to rotately.The firing chamber 19 that faces piston 17 tops is formed between cylinder block 13 and the cylinder head 14.

On cylinder head 14, be provided with respectively first and second intake valve ports 20 and 21 to the ceiling wall 19a of firing chamber 19 opening, to the exhaust valve port 22 of above-mentioned ceiling wall 19a opening, commonly link to each other and link to each other and with 21 to the relief opening 24 of cylinder head 14 lower side openings to the suction port 23 of cylinder head 14 upper side openings, with above-mentioned relief opening 22 with above-mentioned first and second intake valve ports 20.

First and second intake valve ports 20 and 21 opening ends to firing chamber 19 are opened and closed by first and

second suction valves

27,28 respectively.Exhaust valve port 22 is opened and closed by outlet valve 29 to the opening end of firing chamber 19.First and

second suction valves

27,28 are entrenched in respectively in the guide cylinder 30 that is fixed on the cylinder head 14 slidably, and valve spring 32 is separately positioned on and is separately fixed between the guard ring 31 and cylinder head 14 of two

suction valve

27,28 upper ends that guide cylinder 30 is given prominence to.Elastic force by valve spring 32 performances pushes away two

suction valves

27,28 to closing direction.Outlet valve 29 is entrenched in the guide cylinder 33 that is fixed on the cylinder head 14 slidably, valve spring 35 is arranged between the guard ring 34 and cylinder head 14 that is fixed on from the upper end portion of the outstanding outlet valve 29 of guide cylinder 33, pushes away outlet valve 29 by the elastic force of valve spring 35 performances to closing direction.

The position at the center of bias combustion chamber 19 in first intake valve port 20 distolateral along two intake valve ports 20,21 and column direction corresponding one, with outlet valve 29 and column position, the spark plug 26 that will face firing chamber 19 is installed in the cylinder head 14.

By to have with the axis of cylinder bore 16 be the parallel axis of cylinder axis C and be arranged on nozzle 25 in the cylinder head 14 between above-mentioned two

suction valves

27,28 and outlet valve 29, fuel and Air mixing gas are directly injected in the firing chamber 19, in this embodiment, be arranged in the cylinder head 14 with the coaxial nozzle 25 of cylinder axis C.

The exhaust valve port 22, spark plug 26 that is nozzle 25, a pair of intake valve port 20 and 21, corresponding second intake valve port 21 adopts following manners to be arranged in the cylinder head 14, and promptly two intake valve ports 20 and 21, exhaust valve port 22 and spark plug 26 are around nozzle 25.

With reference to Fig. 5～Fig. 7, first and

second suction valves

27,28 and outlet valve 29 are by driving valve device 38 driven for opening and closing.Driving valve device 38 comprises having air inlet side and

exhaust side cams

39 and 40 and the camshaft 41 that rotates, be driven in air inlet side first Rocker arm 42 of above-mentioned air inlet side cam 39 and swing, be driven in exhaust side first Rocker arm 43 of above-mentioned exhaust side cams 40 and swing, at one end have a pair of pushing wrist 44a that contacts with 28 with first and second suction valves 27 and air inlet side second Rocker arm 44 of 44b, exhaust side second Rocker arm 45 that at one end has the pushing wrist 45a that contacts with outlet valve 29, the oscillating motion of air inlet side first Rocker arm 42 is delivered to air inlet side second Rocker arm 44 and is arranged on air inlet side drive bar 46 between air inlet side first and second Rocker arm 4s 2 and 44, the oscillating motion of exhaust side first Rocker arm 43 is delivered to exhaust side second Rocker arm 45 and is arranged on exhaust side driveshaft 47 between exhaust side first and second Rocker

arm 4s

3 and 45.

The first moving valve chamber 48 is formed between cylinder head 14 and the top cover 15, be used for accommodating and dispose above-mentioned driving valve device 38 air inlet sides and exhaust side second Rocker

arm

44 and 45, air inlet side and exhaust side second

pitman arm shaft

58 and 59 of swing pivot Zhi Suoshu air inlet side and exhaust side second Rocker

arm

44 and 45, and air inlet side and

exhaust side driveshaft

46 and 47 tops, the second moving valve chamber 49 that is used to accommodate driving valve device 38 remainders with extending in parallel is being formed on crankcase 12 with cylinder axis C with respect to cylinder axis C being provided with on the side opposition side with above-mentioned spark plug 26, in cylinder block 13 and the cylinder head 14.

For the part that above-mentioned driving valve device 38 is housed in the first moving valve chamber 48 is lubricated, oily spraying hole 36 is set in top cover 15, and the oil that the part that is housed in the first moving valve chamber 48 is lubricated returns in the food tray 12a that is formed on crankcase 12 bottoms (with reference to Fig. 1) through the second moving valve chamber 49.

The air inlet side has respectively from cylinder head 14 sides and air inlet side and

exhaust side cams

39 and 40 rollers 54,55 that roll and contact with exhaust side first Rocker

arm

42,43, can be supported joltily that by suction side and exhaust side first Rocker arm 56,57 this suction side and air inlet side first Rocker arm 56,57 are arranged on the cylinder block 13 with axis parallel with above-mentioned camshaft 41 and cover between 50.Be positioned at above-mentioned roller 54,55 opposition sides on the cup-shaped pushing 42a of portion, 43a adopt respectively in the mode that cylinder head 14 sides are opened and be wholely set on air inlet side and exhaust side first Rocker

arm

42,43.

Camshaft 41 in the driving valve device 38 adopts the modes that are housed in the second moving valve chamber 49 to be arranged on the cylinder block 13, the two end part with the camshaft 41 that parallels to the axis with crankshaft 10 be supported on the cylinder block 13 by ball bearing 51 free to rotately and be formed on second move on the outer side surface of valve chamber 49 with lid 50 that cylinder block 13 links to each other on.

And, be used for providing the fuel feeding road 37 of lubricant oil to be arranged on camshaft 41 to the sliding contacting part of air inlet side and

exhaust side cams

39,40, air inlet side first Rocker arm 42 and exhaust side first Rocker arm 43.

For 1/2 power that transmits from crankshaft 10 that slows down, first driven sprocket 52, first drive sprocket 60 (with reference to Fig. 1) and convex annular endless chain 53 are housed in the second moving valve chamber 49.First driven sprocket 52 can not be combined on the camshaft 41 with relatively rotating, and first drive sprocket 60 can not be combined on the crankshaft 10 with relatively rotating, and convex annular endless chain 53 volumes hang on first drive sprocket 60 and first driven sprocket 52.

Air inlet side and exhaust side live

axle

46,47 extend between the part of the second moving valve chamber 49 across the first moving valve chamber 48, become with the space of cylinder head 14 sides live

axle

46,47 straitly is set.One distolateral balled end of air inlet side and exhaust side

live axle

46,47 can be entrenched on the 42a of pushing portion, the 43a of air inlet side and exhaust side first Rocker

arm

42,43 yaw.

In the first moving valve chamber 48, have the air inlet side of the axis parallel with camshaft 41 and exhaust side second

pitman arm shaft

58 and 59 and be arranged on ground, said nozzle 25 both sides and support and be fixed on the cylinder block 14, at one end side has with the last end in contact of first and

second suction valves

28,29 and with two suction valves, 28,29 interlocks and can be supported on air inlet side second pitman arm shaft 58 with air inlet side second Rocker arm 44 that is connected and be branched into two strands a pair of pushing cup-shaped portion 42a, 42b with freely swinging.At one end side has with the last end in contact of outlet valve 29 and with exhaust side second Rocker arm 45 of these outlet valve 29 interlocks and the pushing cup-shaped portion 45a that is connected and can be supported on exhaust side second pitman arm shaft 59 with freely swinging.

And, on the opposition side of two pushing cup-

shaped portion

44a, 44b that air inlet side second pitman arm shaft 58 is closed, the cup-shaped compression zone 44c that opens wide in cylinder block 13 sides is arranged on another end of air inlet side second Rocker arm 44 integratedly, on the opposition side of the pushing cup-shaped portion 45a that exhaust side second pitman arm shaft 59 is closed, the bowl-shape compression zone 45b that opens wide in cylinder block 13 sides is arranged on exhaust side second Rocker arm 45 integratedly.

Another end of above-mentioned air inlet side and exhaust side second Rocker

arm

44,45 is that compression zone 44c, 45b are arranged between the end of air inlet side and exhaust side second

pitman arm shaft

58,59, and air inlet side and exhaust side

live axle

46,47 are connected with another end of air inlet side and exhaust side second Rocker

arm

44,45 between an end of air inlet side and exhaust side second

pitman arm shaft

58,59.

In this driving valve device 38, corresponding rotation of transmitting the camshaft 41 of rotational power from crankshaft with 1/2 reduction speed ratio, follow the swing of air inlet side cam 39 by air inlet side first Rocker arm 42, air inlet side drive roller 46 is to its axial start, corresponding to this, by 4 swings of air inlet side second Rocker arm 4, first and

second suction valves

27,28 are by driven for opening and closing, follow the swing of exhaust side cams 40 by exhaust side first Rocker arm 43, exhaust side drive roller 47 is to its axial start, corresponding to this, by 5 swings of exhaust side second Rocker arm 4, outlet valve 29 is by driven for opening and closing.

Thereby, piston 66 is fed in the nozzle 25 along the pressurized air with the reciprocal reciprocating air pump 61 that drives of cylinder axis C parallel direction.Be arranged on exhaust 24 sides on the cylinder head 14 in correspondence, described air pump 61 is arranged on the bottom of cylinder block 13.And, with the vertical plane of cylinder axis C in be formed in the cylinder block 13 with start chamber 62 below the second moving valve chamber 49 roughly becomes the L font to be connected to be configured in cylinder bore 16.

With reference to Fig. 8, the pump case 63 of air pump 61 has the axis parallel with cylinder axis C, be the tubular article that the end is arranged that opens wide in cylinder head 14 sides simultaneously, and integrally formed with cylinder block 13, the cover 64 of the said cylinder of this pump case 63 of gastight closing 14 a side opening portion is connected on the cylinder block 13.

Piston 66 is entrenched in the pump case 63 slidably, form the pump chamber 65 be arranged on cylinder head 14 sides between one end of piston 66 and the cover 64 so that corresponding volume shrinks and generates pressurized air, the atmospheric pressure chamber 88 that is arranged on food tray 12a side is formed between the dead end of the other end of piston 66 and pump case 63.

On the one hand, the cylindrical bearing parts 69 that have with the parallel axes of camshaft 41 and the axis by above-mentioned piston 66 axis are arranged in the start chamber 62, are connected respectively on a plurality of for example 4 the connection boss 70 that are darted on the cylinder block 13 by bolt 71 these bearing part 69.And the lid 72 that forms start chamber 62 exterior lateral sides is connected on the cylinder block 13, covers at 72 o'clock opening, and can carry out tightening and unclamping operation of above-mentioned bolt 71.

Pump live axle 73 inserts above-mentioned bearing part 69 coaxially, roller bearing 74 is installed between the end and pump live axle 73 of bearing part 69, ball bearing 75 is installed between the other end and pump live axle 73 of bearing part 69.Be that pump live axle 73 is supported on the bearing part 69 that links to each other with cylinder block 13 freely to rotate.

Utilization is in the outstanding part in bearing part 69 1 ends, power from camshaft 41 is delivered to pump live axle 73 by transmission of power means 89, transmission of power means 89 by be fixed on second driven sprocket 78 on the pump live axle 73, be combined in first driven sprocket 52 on the camshaft 41 for second driving sprocket wheel 79 of one, be wrapped in second ring chain 80 that moves and drive on the driven

sprocket

78,79 and form.

Pump live axle 73 links to each other with the piston 66 of air pump 61 by dog link formula crank 84, and dog link formula crank 84 is exactly to make the front end of the eccentric shaft 73a that gives prominence to from the eccentric position of pump live axle 73 1 ends be connected to parts on the slip block 68 that is entrenched in slidably on the piston 66.And pump live axle 73 utilizes the power that comes from camshaft 41 transmission to rotate, and corresponding to this, eccentric shaft 73a is around the rotational of pump live axle 73.The volume ground that the piston 66 of air pump 61 can increase and decrease pump chamber 65 back and forth drives in pump case 63 vertically.

Sliding eye 67 is arranged on the piston 66, the axis of sliding eye 67 be arranged on along the diameter line of piston 66 and with the plane of the axis normal of camshaft 41 in, above-mentioned slip block 68 is entrenched in the sliding eye 67 slidably, and in addition, eccentric shaft 73a is darted on the end of pump live axle 73 integratedly.

And, the opening portion 76 of the one end insertion of pump live axle 73 is arranged in the pump case 63, make the rotation of respective pump live axle 73 allow to be arranged on the piston 66, its vertical central part by sliding eye 67 is set along the patchhole 77 that the axial direction of sliding eye 67 makes eccentric shaft 73a insert movably.

Central part between ball bearing 75 and roller bearing 74, through hole 81,82 is separately positioned on the both sides of bearing part 69, in the position of a corresponding through hole 81, be used for to fall the oily conductor 83 that the part of the oil in the start chamber 62 is directed between bearing part 69 and the pump live axle 73 and be arranged on bearing part 69 integratedly.Promptly be used to guide a part that accumulates in the oil of bottom in the first moving valve chamber 48 will be arranged on cylinder head 14 interior paths 134 and be arranged on cylinder head 14, lead to described path 134 and be arranged on the cylinder block 13 to the path 135 of start chamber 62 openings, the oil that will fall from path 135 is arranged on the bearing part 69 integratedly by the oil-piping layout 83 of through hole 81 guiding.And, a part that is directed to the oil between bearing part 69 and the pump live axle 73 is used for lubricated ball bearing 75 and roller bearing 74, remainder is fallen bottom in the start chamber 62 from through hole 82, and the oil that accumulates in bottoms in the start chamber 62 returns food tray 12a from the return path 136 that communicates with bottoms in the start chamber 62 and be arranged on the cylinder block 13.

With respect to the opposition side of above-mentioned bearing part 69 at air pump 61, the water pump 90 that has with the coaxial rotation axis of pump live axle 73 is installed on the cylinder block 13.Air pump 61 and water pump 90 are with respect to comprising cylinder axis C and the plane P L plane symmetry ground vertical with pump live axle 73 is provided with.

The pump case 91 of water pump 90 is made of the pump cover 93 of the open end of housing body 92 and enclosing housing main body 92, the ware shape 92b of portion is connected with integratedly and is on the open end that the 92a of round-ended cylinder portion is arranged that pump live axle 73 side seals close and forms described housing body 92, pump cover 93 is clamped in the open end peripheral part of housing body 92 between itself and the cylinder block 13, adopt this mode, link to each other with cylinder block 13.

Be supported on freely to rotate on the central part of the central part of closed end of the 92a of round-ended cylinder portion and pump cover 93 with coaxial pump shaft 94 its two end part of pump live axle 73, internal magnet 96 is fixed on described pump shaft 94 unitary rotation and is inserted with on the rotor 95 in the 92a of round-ended cylinder portion.On the other hand, have the rotatable parts 97 that center on the cylindrical part 97a that the 92a of round-ended cylinder portion is arranged of above-mentioned housing body 92 coaxially and be fixed on from the other end of the outstanding pump live axle 73 of the other end of bearing part 69, on the inner face of above-mentioned cylindrical part 97a, be fixed with external magnet 98.Thereby, rotating simultaneously corresponding to rotatable parts 97 and pump live axle 73, rotor 95 rotates with pump shaft 94.

Thereby, forming volute chamber 99 between housing body 92 and the pump cover 93, the turbine 100 that is housed in the volute chamber 99 is arranged on the rotor 95.

A plurality of suction ports 101 at volute chamber 97 central part openings are arranged on the pump cover 93, and the cooling water that sucks in the described volute chamber 99 from described suction port 101 is pressurizeed by the rotation of turbine 100.And the chilled(cooling) water supply (CWS) of discharging from water pump 90 is to being arranged on the cylinder side water jacket 102 on the cylinder block 13 and leading to this piece side water jacket 102 and be arranged on top side water jacket 103 on the cylinder head 14.Temperature corresponding to cooling water, the state that switching will be directed to radiator not shown in the figures etc. from the cooling water that base side water jacket 103 is discharged, return suction port 101 through radiator is by thermostat 104, and the thermostat housing 105 of thermostat 104 is integrally formed with the pump cover 93 of above-mentioned water pump 90.

In the air pump 61, the part oil of the second moving valve chamber 49 of flowing through is done lubricatedly to lead to second and move valve chamber 49 ground and be arranged on the upper portion side wall of pump case 63 with importing oily introduction holes 85 in the pump case 63.According to the rotation of the second moving valve chamber 49, the air inlet side cam 39 of camshaft 41 and the rotation of exhaust side cams 40 raise up a part of oil of the second moving valve chamber 48 of flowing through, and utilize action of centrifugal force simultaneously, described oil is separated and disperse.In addition, separate, disperse because of centrifugal action though supply with the part oil of supplying with on road 37 from oil, the oily spittle after employing will separate is directed to the relative position that oily introduction hole 85 interior modes are set camshaft 41 and oily introduction hole 85.

The width of the part of driving valve device 38 in the corresponding second moving valve chamber, the ratio other parts that form are big, the prominent wall 86 of the part of air inlet side cam 39 and exhaust side cams 40 oppositely is wholely set on cylinder block 13 with the interior oily circulating direction 137 of the second moving valve chamber in the corresponding camshaft 41 roughly semicirclely, the oily return aperture 85 of above-mentioned air pump 61 is arranged on the positive upstream position of above-mentioned prominent wall 86 along oily circulating direction 137.Promptly prominent wall 86 can move the oil that circulation is come in the valve chamber second and be directed in the oily introduction hole 85.

But oily return aperture 85 from be installed on piston 66 peripheries and with pump case 63 in all sliding contacts piston ring 138 interior all openings of atmospheric pressure chamber 88 side direction pump case 63 be arranged on the pump case 63.With the irrelevant oily return aperture 85 of moving axially of piston 66 always be arranged on piston 66 on an end of sliding eye 67 be communicated with.And, the end that connects atmospheric pressure chamber 88 sides of piston 66 is arranged on the periphery of piston 66 with a pair of groove 139 that links sliding eye 67 two ends, parts that are directed to oil in the pump case 63 from oily return aperture 85 are used for lubricated between piston 66 and pump case 63, remainder through above-mentioned groove 139 in atmospheric pressure chamber 88 side flow.But above-mentioned groove 139 is put the oil that runs in the sliding eye 67, also realizes preventing from effectively to produce in dog link formula crank 84 pumping action of slip block 68.

Oil in atmospheric pressure chamber 88 side flow flows to start chamber 62 sides from opening portion 76, and flows to food tray 12a side from return path 136.

With reference to Fig. 7 and 8, nozzle 25 is that first injection valve 107 constituted with 108 coaxial connections of second injection valve especially, and first injection valve 107 is used for burner oil and is installed in top cover 15; Second injection valve 108 will be directly injected in the firing chamber 19 with pressurized air fuel together and will be installed on the cylinder head 14, and second injection valve 108 has the nozzle 108a that charges in the firing chamber 19.

Be used for the embedding hole 109 of chimeric airtightly said nozzle 108a, bigger and be arranged on cylinder head 14 coaxially with cylinder axis C than the diameter of embedding hole 109 with the embedding hole 109 coaxial insertion tubes that link to each other 110, second injection valve 108 inserts in described the insertions tube 110 from top cover 15 sides, until airtightly described nozzle 108a is entrenched in the described embedding hole 109 simultaneously by wavy spring packing ring 123 be formed on annular 111 steps between embedding hole 109 and the insertion tins 110 and contact till.

The wire interconnecting piece 108b that second injection valve 108 has at the rear portion is configured in and is arranged on the otch 110a that inserts on tube 110 rear ends, outside inserting tube 110, the couple of conductor 112 of drawing from wire interconnecting piece 108b is clamped between the junction plane of cylinder head 14 and top cover 15 and connects cylinder block 113 and is drawn out to the outside.

On the one hand, chimeric, keep first injection valve 107 in, having the cylindric case of sprayer 114 that above-mentioned second injection valve 108 is clamped in the positioning part of the performance positioning clamping function between the cylinder head 14 is integrally formed in the top cover 15, top cover 15 and cylinder block 14 in conjunction with the time, the back end in contact of the front end of case of sprayer 114 and second injection valve 108.In addition, be connected to the rear end of case of sprayer 114 with the grip block 115 of the rearward end of case of sprayer 114 clampings first injection valve 107.

First injection valve 107 is included in its rear wire terminal 107a, utilize the rear end of case of sprayer 114 and grip block 115 clampings first injection valve 107, when first injection valve 107 was installed on the top cover 15, above-mentioned distribution faced top cover 15 with terminal 107a and externally is provided with.

The annular combustion chambers 116 that lead in first injection valve 107 are formed between the case of sprayer 114 and first injection valve 107, are installed between the case of sprayer 114 and first injection valve 107 from a pair of sealed member 117,118 of the described firing chamber 116 of sandwich.

But the fuel supply path 119 that leads to above-mentioned firing chamber 116 is set directly in the top cover 15, guides the flexible pipe 120 of fuel to link to each other with fuel supply path 119 by joint 121 from fuel supply source not shown in the figures.

In addition, between the rearward end of the front end of first injection valve 107 and second injection valve 108, in case of sprayer 114, form the annular air casing 122 that leads to second injection valve 108, be fed in this air chamber 122 from the pressurized air of above-mentioned air pump 61.

The suction pipe 124 (with reference to Fig. 2) that links to each other with the flexible pipe that is used for guiding from the air of air cleaner not shown in the figures is arranged on the cover 64 of air pump 61, and suction pipe 124 links to each other with pump chamber 65 by the leaf valve (not shown) that are built in the cover 64.

The pressure of corresponding pump chamber 65 increases and the poppet valve 125 of opening valve is built in the above-mentioned cover 64, and the pressurized air of discharging from air pump 61 is supplied with road 126 by above-mentioned poppet valve 125 and pressurized air and is fed in the air chamber 122.

Pressurized air is supplied with road 126 by pipe fitting 127, be set directly at path 128 on the cylinder head 14, communicate with described path 128 and lead to the path 129 that air chamber 122 ground are set directly on the top cover 15 simultaneously and constitute in the earthing mutually with pipe fitting 127.One end of described pipe fitting 127 is connected on the cover 64 that links to each other with above-mentioned poppet valve 125, and the other end is connected on the cylinder head 14 simultaneously.

In addition, insert in cylinder head 14 and the top cover 15 at the two end part of cylindric locating stud 130 that stride across the junction plane of cylinder head 14 and top cover 15, constitutes the part of pressurized air path 126 and be set directly at cylinder head 14 to link to each other by above-mentioned locating stud 130 with 129 with path 128 on the top cover 15.But, be clamped between the junction plane of cylinder head 14 and top cover 15 around the O type ring 133 of locating stud 130.

In addition, spray orifice 131 is formed in the locating stud 130, and the safety valve 132 (with reference to Fig. 2) that is connected to the above-mentioned path 128 of upstream side from spray orifice 131 is installed on the cylinder head 14.

With reference to Fig. 1 and 3, by suction tude 141, Throttle valve device 140 is connected on the suction port 23 of cylinder head 14.Described Throttle valve device 140 comprise the described inlet air pathway of body 143, crosscut with inlet air pathway 142 142 and be supported on throttle spindle 144 on the body 143 rotationally, from the full close position to the fully open position, rotate so as to regulate the opening area of above-mentioned inlet air pathway 142 and be fixed on tabular butterfly throttle valve 145 on the throttle spindle 144, the outside of above-mentioned body 143 and be fixed on throttle valve cylinder 146 on the end of throttle spindle 144.Throttle valve cable 147 by the operation of functional units such as throttle valve clamp twines and is connected on the throttle valve cylinder 146.

Body 143 is to be connected to the parts on the suction tude 141 so that inlet air pathway 142 leads in the suction tude 141 by connecting belt 149, and the amounts of rotation that comprises above-mentioned throttle spindle 144 of detection and butterfly throttle valve 145 is that the control unit 148 of the inductor of throttle valve cable 147 operation amounts is installed on the body 143.Fuel and Air mixing gas jet amount by said nozzle 25 ejections are controlled by the amounts of rotation of control unit 148 corresponding above-mentioned throttle valve 145.

Having that the suction port 23 of cylinder head 14 forms sucks the required sufficient opening area of necessary air quantity when the maximum output of motor.Correspondence therewith, the inlet air pathway 142 of Throttle valve device 140 forms has such opening area, promptly can turn to throttle valve 145 till the fully open position under the neutral position state between above-mentioned full close position and the fully open position, can when the maximum output of above-mentioned motor, suck necessary air quantity from full close position.

Promptly as shown in Figure 9, when throttle valve 145 from full close position during to the fully open position rotating operation, the air inflow that flows through inlet air pathway 142 becomes according to all determined full admission amounts of circulating resistance of gas handling system less than the suction port 23 of inlet air pathway 142 that comprise that opening area sets, in case arrive the full admission amount, even at fully open position side operated throttle valve 145, air inflow does not increase yet.

The interior shape of suction tude 141 forms the inlet air pathway 142 of Throttle valve device 140 and suction port 123 taper of combination glossily.

Hereinafter the effect to this embodiment describes, nozzle 25 with axis parallel with cylinder axis C is arranged on the cylinder block 14, the mixed gas of being made up of fuel and air can be directly injected in the firing chamber 19, described mixed gas can be concentrated near the center of firing chamber 19, because can dilute combustion, thereby can reduce burning fee and use.And, since nozzle 25 be by pressurized air with fuel particlesization and be directly injected to parts in the firing chamber, under the tiny flow quantity fuel atomizing good, designs simplification improves flammability, can further be reduced in the fuel cost under low-load, the slow-speed of revolution.

It is controlled though the air-fuel mixture amount correspondence of spraying from nozzle 25 is connected to the amounts of rotation of the throttle valve 145 that the Throttle valve device on the suction port 23 140 had on the cylinder head 14 by suction tude 141, as shown in Figure 9, be directed to air inflow in the suction port 23 by Throttle valve device 140 and suction tude 141 and there is non-linear relation in the amounts of rotation of throttle valve 145.

Promptly can suck the abundant opening area of necessary air quantity when the motor maximum is exported owing to having of 23 formation of the suction port on the cylinder head 14, the inlet air pathway 142 of Throttle valve device 140 forms has such opening area, be that throttle valve 145 is under the neutral position state between full close position and the fully open position, can when the maximum output of above-mentioned motor, suck necessary air quantity, in open side to greatest extent before the rotary throttle valve 145, the opening area of inlet air pathway 142 must be able to make necessary air ventilation when the maximum output of motor in Throttle valve device 140, and the opening area of inlet air pathway 142 may also become non-linear in the amounts of rotation of throttle valve 145 and the Throttle valve device 140.And, utilization makes the simple structure of the Throttle valve device 140 of throttle valve 145 rotations by the operation of cheap throttle valve cable 147, the amounts of rotation and the pass between the air inflow of throttle valve 145 are non-linear, can reduce the low fuel cost of rotating the territory of engine low load.

Because the interior shape shape of suction tude 141 is can be with in succession the taper glossily of the inlet air pathway 142 of Throttle valve device 140 and suction port 23, induction air flow ratio till from the inlet air pathway 142 of Throttle valve device 140 to suction port 23 changes glossily, can more stably control the output of motor.

Above embodiments of the invention are illustrated, but the present invention is not limited to the foregoing description, can carries out various design alterations.

Claims

1. the direct fuel-injection engine air inlet system on the suction port (23) that Throttle valve device (140) is connected to cylinder head (14) by suction tude (141), wherein, Throttle valve device (140) comprises the have inlet air pathway body (143) of (142), the described inlet air pathway of crosscut (142) and be supported on throttle spindle (144) on the above-mentioned body (143) rotationally, be used to regulate the opening area of above-mentioned inlet air pathway (142) and be fixed on throttle valve (145) on the above-mentioned throttle spindle (144), the outside of above-mentioned body (143) and be fixed on throttle valve cylinder (146) on the end of throttle spindle (144), twine and be connected the throttle valve cable (147) on the throttle valve cylinder (146), the amounts of rotation of corresponding above-mentioned throttle valve (145) and the nozzle (25) that injects fuel directly in the firing chamber (19) is arranged on the cylinder head (14), it is characterized in that: described suction port (23) forms has the opening area that can suck necessary air quantity when motor is maximum to be exported, the inlet air pathway (142) of Throttle valve device (140) forms has such opening area, promptly the tabular throttle valve (145) that rotates to fully open position from full close position is under the state in the neutral position between full close position and the fully open position, necessary air quantity in the time of can sucking the maximum output of above-mentioned motor.

2. according to the described direct fuel-injection engine air inlet system of claim 1, it is characterized in that: the interior shape of above-mentioned suction tude (141) is for can be with in succession the taper glossily of the inlet air pathway (142) of Throttle valve device (140) and suction port (23).

3. according to claim 1 or 2 described direct fuel-injection engine air inlet systems, it is characterized in that: the amounts of rotation that is arranged on the corresponding throttle valve of said nozzle (25) (145) on the cylinder head (14) will be directly injected to by the mixed gas that fuel and air are formed in the firing chamber (19).