CN201090302Y - 2.8 liter high pressure co-rail electric control diesel engine - Google Patents

Abstract

The utility model relates to a 2.8L high-pressure co-track electric control diesel engine, which comprises a unit body, a cylinder cover, a piston, a crank lever mechanism, a gas dispensing mechanism, a gas inlet and discharge system, and a fuel feeding system. The utility model is characterized by straight line, four-cylinder, four-stroke, water cooling, straight jet, turbocharged and intercooled, high pressure co-track, and electrical control. The structural improvement is to optimize each mechanism, the internal diameter of cylinder sleeve is Phi90-Phi96mm and divided into four size groups, total height of the cylinder body is 270-276mm, the height of the cylinder head is 92-95mm, the connection line between the centers of the gas inlet and discharge valves is at a distance of 7-9mm from the central line of the cylinder, the gap between the gas inlet and discharge gates, the mounting hole of oil sprayer is inclined at an angle of 8-12 degrees from vertical direction. The utility model has the advantages of 2.8L discharge, nominal power 70-90kw, and maximum torque 200-280Nm. The utility model is applicable for light truck, pick-up truck, 6m series chassis and multifunctional vehicles. The emission of the utility model is compliant to EUROIII standard.

Description

Press common rail electric-controlled diesel engine 2.8 raise

Technical field

The utility model relates to a kind of high pressure common rail electric-controlled diesel engine.

Background technique

The electronic Control for Diesel Engine technology starts from the seventies in 20th century, since the eighties in 20th century, the Detroit Diesel of Britain Lucas company, company of German Bosch, Mercedes, AM General, comings company, Caterpillar, Japan Isuzu Motors motor corporation and JP-6301 etc. are all competitively developed new product and are put on market, to satisfy the emission regulation demands of increasingly stringent.

Because diesel engine possesses characteristics such as high moment of torsion, long-life, low oil consumption, low emission, diesel engine becomes automobile and the real and the most reliable means of engineering machinery energy problem of solving.Therefore the using scope of diesel engine is more and more wider, and quantity is more and more.Also more and more higher to the requirement of power performance, economic performance, control toxic emission and the noise pollution of diesel engine simultaneously.Rely on traditional machinery control injection system can't satisfy above-mentioned requirements, also be difficult to the requirement that realizes that fuel injection quantity, injection pressure and injection timing turn round by optimum condition fully.In recent years, along with developing rapidly of computer technology, sensor technology and information technology, make the each side such as reliability, cost, volume of electronic product can both satisfy diesel engine and carry out electronically controlled requirement, and control fuel injection is easy to realize.

Use through years of researches and new technology, the present situation of diesel engine differs widely with in the past.Modern advanced diesel engine generally adopts technology such as cold in electric-controlled injection, high-pressure common rail, the turbosupercharging, has obtained important breakthrough at aspects such as weight, noise, smoke intensities, has reached the level of petrol engine.Along with the promulgation and the enforcement of the emission control standard of increasingly stringent (as European IV, V standard) in the world, be that petrol engine or diesel engine all are faced with stern challenge, one of way of solution is to adopt the technology of control fuel injection.Now, the electronic Control for Diesel Engine technology reaches more than 60% at the utility ratio of developed country.

Summary of the invention

The purpose of this utility model is: provide a kind of can be supporting greater than 3.5 tons all kinds of trucies with gross mass, the common rail electric-controlled diesel engine of low pollution high voltage of national current standard limit value is satisfied in discharging.

Concrete architecture advances scheme is as follows:

Press common rail electric-controlled diesel engine 2.8 raise, comprise body, cylinder head, piston and connecting rod, distribution device, air inlet system and exhaust system, fuel oil supply system, automatical control system, lubrication system, cooling system, starting arrangement, electrical system, its form is cold a, high-pressure common rail, automatically controlled in array, four cylinders, four-stroke, water-cooled, straight spray, the turbosupercharging.Described body is a planer type structure, (cylinder sleeve thickness 0.8～1.2mm) adopts casting thin-wall to press-fit steel thin-wall chromium plating dry cylinder liner; Cylinder head adopts cross-flow type intake and exhaust port arrangement, 8 valves and vortex air intake road; Piston combustion bowl is circular reducing dumbbell structure, piston top compression ring groove edge heat resisting alloy cast iron ring, and it is oval that the skirt section becomes midway, adopts piston cooling nozzle that the piston cavity oil spout is cooled off; Adopt new structure piston ring, steel oil ring; Bent axle adopts the alloyed steel precision forging, and the nitrocarburizing processing is done on the surface, and (nitride layer thickness is 0.01～0.5mm), and 4 balancer weights are set, main shaft diameter size grouping assembling; Crank pulley is held concurrently and is torshional vibration damper; Adopted the stacking mode head gasket of metal; Fuel pump in the oil supply system adopts the Electrocontrolled high-pressure pump, and oil sprayer adopts electric-controlled fuel injector; Air inlet is adopted in the exhaust gas turbocharge cold.

Described body cylinder diameter (cylinder sleeve internal diameter) φ 90～φ 96mm, divide 4 set of dimensions, steel thin-wall chromium plating dry cylinder liner thickness is 0.8～1.2mm, and cylinder core distance is 102～110mm, main bearing hole (not being with bearing shell) φ 72～φ 76mm divides 2～4 set of dimensions and bent axle to carry out the galleting tile assembling; The cylinder body height overall is 270～276mm, and cylinder-bore center line and main bearing hole center line be not or not a plane, and 1～3mm setovers; The no water jacket through-flow technology of holing.

Described cylinder head height is 92～95mm, and the inlet and outlet door line of centres is apart from cylinder centerline 7～9mm, inlet and outlet door spacing 46～50mm, and mounting hole of oil sprayer and Vertical direction tilt 8 °～12 °.

Described depth pistion is 90～94mm, and compression height is 50～54mm; Piston top compression ring groove edge heat resisting alloy cast iron ring, the trapezoidal angle of annular groove is 12～18 °, and the axial width of the piston second road compression is 2mm, and the 3rd road oil ring groove axial width is 3～4mm; Piston pin hole and piston center line be not or not a plane, and 0.7～1mm setovers.4 set of dimensions of piston skirt part and cylinder-bore are matched.

Described piston ring adopts tricyclic structure, 2 road compression rings, 1 road oil ring.Top compression ring adopts two ladder type spheroidal graphite iron rings, and trapezoidal angle is 12～18 °, width 3～4mm, and (thickness is 0.1～0.3mm) in surperficial sprayed molybdenum processing; The second road compression ring adopts circumscribed twist type ring, thickness 2～3mm, and width 3～4mm, special cast iron material surface phosphatization is handled; Combined oil ring thickness 3～4mm, width 2～3mm, (nitride layer thickness is 0.01～0.1mm) to the surfaces nitrided processing of steel material.

Described connnecting rod big end aperture (not being with bearing shell) is φ 53～φ 59mm, and microcephaly aperture (not belt material cover) is φ 35～φ 39mm, and CONCENTRIC REDUCER hole centre distance is 165～170mm.

Described crank spindle directly is φ 68～φ 72mm, and the main bearing hole that is divided on 3 set of dimensions and the body carries out the galleting tile assembling.Connecting rod journal diameter is φ 50～φ 56mm, and the crank throw radius is 51～53mm.Adopt the alloyed steel precision forging, and the nitrocarburizing processing is done on the surface, and (nitride layer thickness is 0.01～0.5mm), and 4 balancer weights are set, and balanced ratio reaches 45～60%.

Useful technique effect of the present utility model is that discharge capacity is 2.8 liters, nominal power 70～90kw, and Maximum Torque 200～280Nm, suitable coupling light truck, picking-up vehicle, 6 meters serial chassis and MPV (Multi-Purpose Vehicle), discharging can adapt to the EUROIII standard.These facility have fuel consumption rate low, and power performance is good, the excellent performance that starting performance is good, volume is little, in light weight, reliability and durability.

Description of drawings

Fig. 1 is the utility model longitudinal section,

Fig. 2 is the utility model sectional elevation,

Fig. 3 is an A place enlarged view among Fig. 2.

Embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

Embodiment:

Referring to Fig. 1, Fig. 2 and Fig. 3,2.8 raise presses common rail electric-controlled diesel engine to comprise body 7, cylinder head 6, piston 8 and connecting rod, distribution device, air inlet system and exhaust system, fuel oil supply system, automatical control system, lubrication system, cooling system, starting arrangement, electrical system; Reference character is an intake valve 1 among Fig. 1 and Fig. 2, exhaust valve 2, electric-controlled fuel injector 3, glow plug 4, cylinder cap guard shield 5, cylinder head 6, body 7, piston 8, crank pulley 9,10, bar 10, flywheel 11, bent axle 12, turbosupercharger 13, gas exhaust manifold 14, push rod 15, head gasket 16, intake manifold 17, cylinder liner 18, tappet 19, camshaft 20, electrical control oil spray pump 21, piston cooling nozzle 22, engine oil pump assembly 23, oil sump 24, top compression ring 25, the second road compression rings 26, combined oil ring 27.

Body 7 materials adopt gray cast iron, and crankcase is a planer-type, adopt casting thin-wall, steel thin-wall chromium plating dry cylinder liner 18 (cylinder sleeve thickness 0.8～1.2mm); Inblock cylinder is classified 4 cylinders in upright arrangement as, and cylinder directly is φ 90～φ 96mm, and cylinder core distance is 102～110mm, and the cylinder body height overall is 270～276mm; Cylinder-bore center line and main bearing hole center line be not or not a plane, and biasing 1～3mm can effectively reduce the low engine speed noise; Body 7 fire power face water jacket segment thicknesses 13～18, the no water jacket through-flow technology of holing is adopted on top between the cylinder-bore, and the cylinder pore structure rigidity obtains very big reinforcement; The stiffening rib and the web thickness at main bearing seat A, B, C place are also strengthened, and have reduced body deformation as much as possible.

Cylinder head 6 also adopts the gray cast iron casting, adopts 8 valves, 1, four exhaust valve 2 of four intake valves, and the vortex air intake road, design can utilize intake swirl effectively to promote the formation of mixed gas in the cylinder like this; Oil sprayer 3 and Vertical direction 10 °～12 ° layouts that tilt, the oily line that helps oil sprayer be evenly distributed and cylinder in the formation of mixed gas, make that burning is more abundant; Cylinder head 6 is 92～95mm highly only, has reduced the complete machine height, makes complete machine structure compacter.As Fig. 1,2, shown in.

Piston 8 highly is 90～94mm, and compression height is 50～54mm; Piston top compression ring groove edge heat resisting alloy cast iron ring is trapezoidal annular groove, and trapezoidal angle is 12 °～18 °.Heat resisting alloy cast iron annular groove can reduce wearing and tearing, trapezoidal groove structure can utilize and piston ring between the effective decarbonizing of relative movement, the working life of top compression ring 25 and reliability are strengthened greatly.The axial width of the piston second road compression is 3～4mm, and the 3rd road oil ring groove axial width is 2～3mm.And adopt piston cooling nozzle that the piston cavity oil spout is cooled off.

Connecting rod 10 major part apertures are 56mm (not being with bearing shell), and the microcephaly aperture is 37mm (a not belt material cover), and CONCENTRIC REDUCER hole centre distance is 165～170mm.

Piston ring adopts tricyclic structure, 2 road compression rings, 1 road oil ring.Top compression ring 25 adopts two ladder type spheroidal graphite iron rings, and trapezoidal angle is 12～18 °, width 3～4mm, and (thickness is 0.1～0.3mm) in surperficial sprayed molybdenum processing; The second road compression ring 26 adopts circumscribed twist type ring, thickness 2～3mm, and width 3～4mm, special cast iron material surface phosphatization is handled; Combined oil ring 27 thickness 3～4mm, width 2～3mm, (nitride layer thickness is 0.01～0.1mm) to the surfaces nitrided processing of steel material.

Distribution device adopts the timing gear transmission.

Bent axle 12 main shaft diameter are φ 68～φ 72mm, and the main bearing hole that is divided on 3 set of dimensions and the body carries out the galleting tile assembling.Connecting rod journal diameter is φ 50～φ 56mm, and the crank throw radius is 51～53mm.Adopt the alloyed steel precision forging, and the nitrocarburizing processing is done on the surface, and (nitride layer thickness is 0.01～0.5mm), and 4 balancer weights are set, and balanced ratio reaches 45～60%.The integral rubber outside framework oil seal is all adopted in the front and back sealing of bent axle.

Crank pulley is held concurrently and is torshional vibration damper.

Fuel oil supply system: adopt pump, pipe, mouth structure, axial plunger VE dispense fuel pump 21 sprays into cylinder to high pressure oil in proper order by high-pressure oil pipe and two-spring injector, and unnecessary fuel oil returns fuel tank through return tube.

Air inlet system and exhaust system: split about intake manifold 14, gas exhaust manifold, air inlet is adopted in the turbosupercharging cold.Air is behind air-strainer, again by turbosupercharger 13 superchargings, with entering suction tude after the intercooler cooling.

Lubrication system: the mode that adopts pressure lubrication to combine with splash lubrication;

Cooling system: adopt the enclosed of cylinder body water inlet, cylinder cap water outlet to force the type of cooling, be divided into big short circle according to coolant temperature; The intermediate of turbosupercharger 13 does not have constituent.

Starting arrangement: speed reduction type low speed high pulling torque actuating motor.

Electrical system: alternator, glow plug, engine oil pressure warning, cooling-water temperature sensor and cold starting sensor.2.8 risings that the utility model provides are pressed common rail electric-controlled diesel engine, the emission standard that satisfied country has implemented:

GB17691-2001 automobile-used compression ignition engine tailpipe emission limit value and method of measurement

GB 3847-2005 compression ignition engine and the dress visible pollutant limit value of vehicle exhaust and the test method of compression ignition engine.

Claims (1)

1. Press common rail electric-controlled diesel engine 1.2.8 raise, comprise body, cylinder head, piston and connecting rod, distribution device, air inlet system and exhaust system, fuel oil supply system, automatical control system, lubrication system, cooling system, starting arrangement, electrical system, its form is cold a, high-pressure common rail, automatically controlled in array, four cylinders, four-stroke, water-cooled, straight spray, the turbosupercharging; Described body is a planer type structure, and described cylinder head is provided with the cross-flow type intake and exhaust port, and piston combustion bowl is circular reducing dumbbell structure, piston top compression ring groove edge heat resisting alloy cast iron ring, and the middle part, skirt section is oval, piston cooling nozzle is corresponding with piston cavity; Bent axle is the alloyed steel net-size forging, and 4 balancer weights are set on the bent axle, and crank pulley is held concurrently and is torshional vibration damper; Fuel pump in the fuel oil supply system is the Electrocontrolled high-pressure pump, and oil sprayer is an electric-controlled fuel injector; It is characterized in that:

   A, described body cylinder sleeve internal diameter φ 90～φ 96mm, steel thin-wall chromium plating dry cylinder liner thickness is 0.8～1.2mm, cylinder core distance is 102～110mm, main bearing hole φ 72～φ 76mm; The cylinder body height overall is 270～276mm, and cylinder-bore center line and main bearing hole center line be not or not a plane, and 1～3mm setovers;

   B, described cylinder head height are 92～95mm, and the inlet and outlet door line of centres is apart from cylinder centerline 7～9mm, inlet and outlet door spacing 46～50mm, and mounting hole of oil sprayer and Vertical direction tilt 8 °～12 °;

   C, described depth pistion are 90～94mm, and compression height is 50～54mm; Piston top compression ring groove edge heat resisting alloy cast iron ring, the trapezoidal angle of annular groove is 12～18 °, and the axial width of the piston second road compression is 2mm, and the 3rd road oil ring groove axial width is 3～4mm; Piston pin hole and piston center line be not or not a plane, and 0.7～1mm setovers;

   D, described piston ring adopt tricyclic structure, comprise top compression ring, the second road compression ring, the 3rd road oil ring; The top compression ring material is two ladder type spheroidal graphite cast iron, and trapezoidal angle is 12～18 °, width 3～4mm, and surperficial sprayed molybdenum thickness is 0.1～0.3mm; The second road compression ring is a circumscribed twist type ring, thickness 2～3mm, width 3～4mm; The 3rd road oil ring is a combined oil ring, thickness 3～4mm, and width 2～3mm, the surfaces nitrided layer thickness of steel material is 0.01～0.1mm;

   E, described connnecting rod big end aperture are φ 53～φ 59mm, and the microcephaly aperture is φ 35～φ 39mm, and CONCENTRIC REDUCER hole centre distance is 165～170mm;

   F, described crank spindle directly are φ 68～φ 72mm, and connecting rod journal diameter is φ 50～φ 56mm, and the crank throw radius is 51～53mm, and crankshaft material is the alloyed steel net-size forging, and surfaces nitrided layer thickness is 0.01～0.5mm, and 4 balancer weights are set.

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