CN106437923A

CN106437923A - Turbocharging gasoline engine

Info

Publication number: CN106437923A
Application number: CN201610852297.3A
Authority: CN
Inventors: 黄彦; 黄振华; 黄建忠
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2016-09-27
Filing date: 2016-09-27
Publication date: 2017-02-22

Abstract

The invention relates to the field of engines, in particular to a turbocharging gasoline engine. The turbocharging gasoline engine comprises a double-variable valve timing system and a turbocharger assembly; the gasoline engine is a four-cylinder and four-stroke small-displacement gasoline engine; the double-variable valve timing system includes a camshaft phase actuator, a camshaft chain wheel, a crankshaft chain wheel and a timing chain; the camshaft phase actuator is connected with the camshaft chain wheel; the camshaft chain wheel is connected with a crankshaft through the timing chain and the crankshaft chain wheel; and the turbocharger assembly is a low-inertia turbocharger. The turbocharging gasoline engine adopts a DVVT system and the low-inertia turbocharger, can reach enough intake in whole rotating speed range, greatly improves the inflation efficiency, prominently improves low-speed torque, maintains high-power output at high speed, greatly improves the power performance, and is obvious in improvement effect of oil consumption.

Description

A kind of turbo supercharging gasoline engine

Technical field

The present invention relates to engine art, more particularly to turbo supercharging gasoline engine.

Background technology

Petrol engine is that the flammable mixture that a kind of dependence gasoline is mixed to form with air is discharged in cylinder interior burning Heat energy, then by toggle, convert heat into a kind of spark-ignited internal combustion engine of mechanical energy.Main by body group and Toggle, valve actuating mechanism, fuel delivery and spraying system, air inlet system and exhaust system, lubricating system, cooling system, electronics control The part such as system processed constitutes.

1) during small displacement naturally aspirated engine design at present, the optimal use region of electromotor is middle high engine speed range, Cities and towns market demands cannot be met, client's complaint Fuel Economy is poor, is short of power.

2) traditional electromotor uses drag-line air throttle, it is impossible to realize the optimal torsion of electromotor gamut rotating speed The output of square, and to engine air-fuel ratio cannot precise control, cause to burn insufficient, fuel economy is poor, and discharge is discontented V standard of sufficient state.

3) traditional electromotor uses non-variable valve timing, and in the face of different operating modes, gas distribution phase of engine is no Method needs to be adjusted according to actual condition, and electromotor economy and dynamic property are poor, and emission level is low.

4) traditional electromotor uses free-standing water pump, and fault of water pump rate is high, and poorly sealed, electromotor leaks Liquid, easily causes client to complain, and makes electromotor overall structure not compact.

5) traditional electromotor uses the tappet of non-coating, wears no resistance, frictional dissipation height, causes electromotor to be transported During row, noise is big, oil consumption height；Easily fail under the higher load of electromotor, impact and harsher working environment.

6) traditional inline four-cylinder engine adopts eight balance weight cast-iron crankshafts, relatively costly, and quality lays particular stress on, engine oil Consumption is higher.

7) traditional natural aspirated engine intake efficiency is low, and altitude-compensation is poor, oil consumption height.

Content of the invention

The present invention provides a kind of turbo supercharging gasoline engine, it is intended to solve the poor and power of Fuel Economy not The problem of foot.

The present invention provides a kind of turbo supercharging gasoline engine, including double VVTs（DVVT）, turbine increase Depressor assembly, the petrol engine is the displacement gasoline engine of four cylinder four-stroke, described pair of VVT Including camshaft phase executor, camshaft sprocket, crankshaft sprocket, timing chain, the camshaft phase executor and cam Axle sprocket wheel connects, and the camshaft sprocket is connected with bent axle by timing chain, crankshaft sprocket, and the turbo-charger complement is Low inertia turbocharger.

As a further improvement on the present invention, described pair of VVT includes DVVT control oil duct and main oil Road, the camshaft sprocket includes admission cam shaft sprocket wheel and exhaust cam shaft sprocket wheel, and the camshaft phase executor includes Air inlet executor and gas exhausting operator, the admission cam shaft controls oil duct and air inlet executor by camshaft sprocket, DVVT Connection, the exhaust cam shaft controls oil duct to be connected with gas exhausting operator by camshaft sprocket, DVVT.

As a further improvement on the present invention, described pair of VVT includes admission cam shaft and exhaust cam Axle, the admission cam shaft is connected with admission cam shaft sprocket wheel, and the exhaust cam shaft is connected with exhaust cam shaft sprocket wheel.

As a further improvement on the present invention, the described pair of VVT include timing chain air inlet side rails and Timing chain aerofluxuss side rails, the timing chain air inlet side rails are connected to timing chain near the one of admission cam shaft sprocket wheel Side, the timing chain aerofluxuss side rails are connected to timing chain near the side of exhaust cam shaft sprocket wheel.

As a further improvement on the present invention, the turbo-charger complement include compressor unit, gas sampling unit, Crankcase respiratory pipe, exhaust gas bypass valve actuator, the exhaust gas bypass valve actuator respectively with compressor unit, gas sampling list Unit's connection, the compressor unit is provided with compressor air inlet machine mouth, compressor gas outlet, and the gas sampling unit is provided with aerofluxuss and goes out Mouth, exhaust entrance, the crankcase respiratory pipe is connected at compressor air inlet machine mouth.

As a further improvement on the present invention, the turbo supercharging gasoline engine includes inlet manifold assembly, the air inlet Manifold assembly includes inlet manifold and inlet manifold sealing ring, and the inlet manifold is the plastic material of lower resistance, the air inlet Manifold seal circle is arranged at the mouth of pipe of inlet manifold.

As a further improvement on the present invention, the turbo supercharging gasoline engine also includes modularity drive end bearing bracket and bent axle, The modularity drive end bearing bracket includes that lubricating oil pump and water pump, the lubricating oil pump and water pump are integrated and connected in modularity drive end bearing bracket, institute State at the pumping hole of lubricating oil pump and oil sealing is provided with, the lubricating oil pump is connected with bent axle, one end of the water pump is provided with water inlet.

As a further improvement on the present invention, the bent axle is low inertia gently change amount bent axle, sets on the crank of the bent axle There are four balance weights.

As a further improvement on the present invention, the turbo supercharging gasoline engine also includes tappet, and the tappet top surface is applied There is DLC coating.

As a further improvement on the present invention, the turbo supercharging gasoline engine also includes electronic throttle bodies, the electricity Sub- throttle valve body includes air intake casing, DC servo motor, wire bundle connector, gear drive return mechanism, the DC servo Motor, wire bundle connector, gear drive return mechanism are connected on air intake casing, the wire bundle connector two-port respectively with directly Flow servo motor, ECU connection, the DC servo motor is connected with gear drive return mechanism and drives its motion.

The invention has the beneficial effects as follows：Present invention employs double VVTs and low inertia turbocharging Device, can make electromotor have the air inlet of abundance in the whole range of speeds, substantially increase the charging efficiency of electromotor, significantly carry High electromotor low speed torque high-power output when maintaining high engine speeds, substantially improve the power performance of electromotor, right Oil consumption is obviously improved effect.With the raising of charging efficiency, the altitude-compensation performance of engine with supercharger is far superior to certainly Right aspirated engine, Fuel Economy is improved.

Description of the drawings

Fig. 1 is the structural representation of medium or low resistance power plastic air intake manifold of the present invention；

Fig. 2 is the structural representation of low inertia exhaust-driven turbo-charger exhaust-gas turbo charger in the present invention；

Fig. 3 is the structural representation of modularity drive end bearing bracket in the present invention；

Fig. 4 is the structural representation of low inertia lightweight bent axle in the present invention；

Fig. 5 is the structural representation of DLC coating tappet in the present invention；

Fig. 6 is the pie graph of DLC coating in the present invention；

Fig. 7 is the structure front view of electronic throttle bodies in the present invention；

Fig. 8 is the structural side view of electronic throttle bodies in the present invention；

Fig. 9 is the first structure figure of DVVT system in the present invention；

Figure 10 is the second structure chart of DVVT system in the present invention.

Specific embodiment

In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, right The present invention is further elaborated.

Embodiment one：

As depicted in figs. 1 and 2, the turbo supercharging gasoline engine, including inlet manifold assembly 1, turbo-charger complement 2, vapour Oil turbine includes inlet manifold 11 and inlet manifold for the displacement gasoline engine of four cylinder four-stroke, inlet manifold assembly 1 Sealing ring 12, inlet manifold 11 is arranged on the mouth of pipe of inlet manifold 11 for the plastic material of lower resistance, inlet manifold sealing ring 12 Place, turbo-charger complement 2 is low inertia turbocharger.

Turbo-charger complement 2 is included by compressor unit 21, gas sampling unit 22, crankcase respiratory pipe 23, waste gas Port valve executor 24, exhaust gas bypass valve actuator 24 is connected with compressor unit 21, gas sampling unit 22 respectively, compressor list Unit 21 is provided with compressor air inlet machine mouth 211, compressor gas outlet 212, and gas sampling unit 22 is provided with air exit 222, aerofluxuss and enters Mouth 221, crankcase respiratory pipe 23 is connected at compressor air inlet machine mouth 211.

Using lower resistance plastic air intake manifold 11, inner surface is smooth, and the flow resistance of air-flow is little, improves entering for electromotor Gas efficiency；Using low inertia exhaust gas turbocharge, have benefited from low inertia miniaturization turbocharger, 2 sound of turbo-charger complement Should be quick, electromotor supercharger at 1000 revs/min starts to intervene work, and when 1500 revs/min, engine torque is substantially carried Rise, power performance increases.2000 revs/min of air inlets for having abundance to whole engine speed range, substantially increase The charging efficiency of electromotor, high-power output when significantly improving low engine speed moment of torsion and maintaining high engine speeds, change significantly It has been apt to the power performance of electromotor, effect has been obviously improved to oil consumption.With the raising of charging efficiency, engine with supercharger Altitude-compensation performance is far superior to naturally aspirated engine, even if plateau is surge dynamic using can also experience that electromotor sends Power.

Embodiment two：

As shown in Figure 3 and Figure 4, the turbo supercharging gasoline engine, also includes modularity drive end bearing bracket 3 and bent axle 4, modularity front end Lid 3 includes that lubricating oil pump 31 and water pump 32, lubricating oil pump 31 and water pump 32 are integrated and connected in modularity drive end bearing bracket 3, lubricating oil pump 31 Oil sealing 33 is provided with pumping hole, lubricating oil pump 31 is connected with bent axle 4, one end of water pump 32 is provided with water inlet 34.Bent axle 4 is that low inertia is light Change amount bent axle, the crank 41 of bent axle 4 is provided with four balance weights 42.Modularity drive end bearing bracket 3 is additionally provided with supercharger cooling water inlet pipe 35 and engine mounting installing hole 36.

Using modularity drive end bearing bracket, this drive end bearing bracket integrated engine lubricating oil pump and water pump, improve the life-span of water pump, make to start The arrangement of machine is more compact.Using low inertia lightweight bent axle, 4 balance block structures are applied, the quality of bent axle can be effectively reduced, Mitigate the weight of electromotor, and rotary inertia when can also reduce crankshaft operation, reduce the vibration of electromotor, improve electromotor NVH performance.

Embodiment three：

As shown in Figure 5 and Figure 6, the turbo supercharging gasoline engine also includes tappet 7, and 7 top surface of tappet scribbles DLC coating 71.

Using DLC coating tappet, diamond-like coating (Diamond-like Carbon) or abbreviation DLC coating, be containing Diamond lattic structure（sp³Key）And graphite-structure（sp²Key）Metastable amorphous state material, carbon atom is mainly with sp³And sp²Hybrid bond In conjunction with.Diamond-like coating（DLC coating）It is a kind of amorphous film, can be basically divided into containing hydrogen diamond（a-C:H）Coating With two kinds of non-hydrogen diamond coating.Hydrogen content in hydrogeneous DLC coating between 20at.% ~ 50at.%, sp³Composition is less than 70%.DLC coating is by PAVCD a-C:H 72, PVD Cr+CrN 73,74 3 layers of composition of matrix.

Under running conditions, DLC coating tappet can reach low friction loss, high-wearing feature, the requirement of high rigidity to electromotor, And with the extremely strong performance with metal material bonding, higher load, impact and harsher working environment can be born.

（1）Wearability is improved, wearability improves 10-20 times compared with the tappet of non-band coating；

（2）Reduce friction loss（Reduce valve actuating mechanism friction loss 25-45%, reduce energy resource consumption 2% ~ 3%）；

（3）Work surface hardness is improved, coating top surface microhardness reaches more than 2100HV0.002.

On the other hand, in terms of hardness and wear resistance, diamond-like coating tappet also has obvious advantage.Rub in identical Under the conditions of wiping, through the identical time, the tappet abrasion of non-coating is more serious than coating tappet.

Example IV：

As shown in Figure 7 and Figure 8, the turbo supercharging gasoline engine also includes electronic throttle bodies 5, and electronic throttle bodies 5 include Air intake casing 51, DC servo motor 52, wire bundle connector 53, gear drive return mechanism 54, DC servo motor 52, wire harness Patch plug 53, gear drive return mechanism 54 are connected on air intake casing 51, and 53 two-port of wire bundle connector is watched with direct current respectively The connection of motor 52, ECU is taken, DC servo motor 52 is connected with gear drive return mechanism 54 and drives its motion.Electronic throttle Valve body 5 is additionally provided with aluminum dish valve 55.

Using electronic throttle system, various work informations and sensor signal are judged and processed by ECU, then Optimal throttle opening is calculated, then is reached by the DC servo motor control air throttle in DC servo motor formula air throttle Corresponding throttle opening angle, to reach precise control throttle opening.Electronic throttle system is in all cases to air-fuel Than precise control is carried out, make burning more abundant, while the generation of waste gas is also reduced, improve the discharge performance of electromotor.

Embodiment five：

As shown in Figure 9 and Figure 10, turbo supercharging gasoline engine also includes double VVTs（DVVT）System 6, double variable Valve timing（DVVT）System 6 includes camshaft phase executor 61, camshaft sprocket 62, crankshaft sprocket 63, timing chain 64, Camshaft phase executor 61 is connected with camshaft sprocket 63 by controlling oil duct, camshaft sprocket 62 by timing chain 64 with Crankshaft sprocket 63 connects.

Double VVTs（DVVT）System 6 also includes DVVT control oil duct 65 and main oil gallery 66, camshaft sprocket 62 Including admission cam shaft sprocket wheel 621 and exhaust cam shaft sprocket wheel 622, camshaft phase executor 61 includes air inlet executor 611 With gas exhausting operator 612, admission cam shaft sprocket wheel 621 and DVVT control oil duct 65 and air inlet phase executor 611 to be connected, aerofluxuss Camshaft sprocket 622 controls oil duct 65 to be connected with exhaust phase executor 612 by DVVT.

Double VVTs（DVVT）System 6 also includes admission cam shaft 67 and exhaust cam shaft 68, admission cam shaft 67 are connected with admission cam shaft sprocket wheel 621, and exhaust cam shaft 68 is connected with exhaust cam shaft sprocket wheel 622.

Double VVTs（DVVT）System 6 also includes timing chain air inlet side rails 691 and timing chain exhaust side Guide rail 692, timing chain air inlet side rails 691 are connected to timing chain 64 near the side of admission cam shaft sprocket wheel 621, timing Chain aerofluxuss side rails 692 are connected to timing chain 64 near the side of exhaust cam shaft sprocket wheel 622.

Turbo-charger complement 2 is included by compressor unit 21, gas sampling unit 22, crankcase respiratory pipe 23, waste gas Port valve executor 24, exhaust gas bypass valve actuator 24 is connected with compressor unit 21, gas sampling unit 22 respectively, compressor list Unit 21 is provided with compressor air inlet machine mouth 211, compressor gas outlet 212, and gas sampling unit 22 is provided with air exit 221, aerofluxuss and enters Mouth 222, crankcase respiratory pipe 23 is connected at compressor air inlet machine mouth 211.

VVT（VVT）Port timing can be changed with running conditions of vehicle so that the performance of electromotor Acquisition is substantially improved.While VVT has more preferable effect in terms of engine emission and fuel consumption is reduced Really, external exhaust gas recirculation egr system may replace.After VVT, the dynamic property of electromotor and fuel oil It is obtained in terms of economy and effectively improves.

The petrol engine of the present invention is the four cylinder four-stroke exhaust gas turbocharge petrol engine of 1.5L, and 1.5L discharge capacity increases The performance of hydraulic motor fullys meet design standard, and electromotor maximum net power/rotating speed is 102kW/5500rpm, maximum net Moment of torsion/rotating speed is 220N.m/ (2000 ~ 3800) rpm, and power per liter is up to 75kW/L, and torque per liter is up to 158N.m/L, and same discharge capacity Naturally aspirated engine is compared, and has been respectively increased about 27% and 53%, and electromotor economy and dynamic property are significantly improved.

Above content is further description made for the present invention with reference to specific preferred implementation, it is impossible to assert Being embodied as of the present invention is confined to these explanations.For general technical staff of the technical field of the invention, On the premise of present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's Protection domain.

Claims

1. a kind of turbo supercharging gasoline engine, it is characterised in that including double VVTs（6）, turbocharger Assembly（2）, the petrol engine is the displacement gasoline engine of four cylinder four-stroke, described pair of VVT （6）Including camshaft phase executor（61）, camshaft sprocket（62）, crankshaft sprocket（63）, timing chain（64）, the cam Axle phase place executor（61）With camshaft sprocket（63）Connection, the camshaft sprocket（62）By timing chain（64）, bent axle Sprocket wheel（63）With bent axle（4）Connection, the turbo-charger complement（2）For low inertia turbocharger.

2. turbo supercharging gasoline engine according to claim 1, it is characterised in that described pair of VVT （6）Control oil duct including DVVT（65）And main oil gallery（66）, the camshaft sprocket（62）Including admission cam shaft sprocket wheel（621） With exhaust cam shaft sprocket wheel（622）, the camshaft phase executor（61）Including air inlet executor（611）And gas exhausting operator （612）, the admission cam shaft（67）By camshaft sprocket（62）, DVVT control oil duct（65）With air inlet executor（612） Connection, the exhaust cam shaft（68）By camshaft sprocket（62）, DVVT control oil duct（65）With gas exhausting operator（611）Even Connect.

3. turbo supercharging gasoline engine according to claim 2, it is characterised in that described pair of VVT （DVVT）System（6）Including admission cam shaft（67）And exhaust cam shaft（68）, the admission cam shaft（67）With admission cam Axle sprocket wheel（621）Connection, the exhaust cam shaft（68）With exhaust cam shaft sprocket wheel（622）Connection.

4. turbo supercharging gasoline engine according to claim 2, it is characterised in that described pair of VVT （6）Including timing chain air inlet side rails（691）With timing chain aerofluxuss side rails（692）, the timing chain air inlet side leads Rail（691）It is connected to timing chain（64）Near admission cam shaft sprocket wheel（621）Side, the timing chain aerofluxuss side rails （692）It is connected to timing chain（64）Near exhaust cam shaft sprocket wheel（622）Side.

5. turbo supercharging gasoline engine according to claim 1, it is characterised in that the turbo-charger complement（2） Including compressor unit（21）, gas sampling unit（22）, crankcase respiratory pipe（23）, exhaust gas bypass valve actuator（24）, institute State exhaust gas bypass valve actuator（24）Respectively with compressor unit（21）, gas sampling unit（22）Connection, the compressor list Unit（21）It is provided with compressor air inlet machine mouth（211）, compressor gas outlet（212）, the gas sampling unit（22）It is provided with aerofluxuss to go out Mouthful（222）, exhaust entrance（221）, the crankcase respiratory pipe（23）It is connected to compressor air inlet machine mouth（211）Place.

6. turbo supercharging gasoline engine according to claim 1, it is characterised in that including inlet manifold assembly（1）, institute State inlet manifold assembly（1）Including inlet manifold（11）With inlet manifold sealing ring（12）, the inlet manifold（11）For low-resistance The plastic material of power, the inlet manifold sealing ring（12）It is arranged on inlet manifold（11）The mouth of pipe at.

7. turbo supercharging gasoline engine according to claim 1, it is characterised in that also include modularity drive end bearing bracket（3） And bent axle（4）, the modularity drive end bearing bracket（3）Including lubricating oil pump（31）And water pump（32）, the lubricating oil pump（31）And water pump （32）It is integrated and connected in modularity drive end bearing bracket（3）Interior, the lubricating oil pump（31）Pumping hole at be provided with oil sealing（33）, the lubricating oil pump （31）With bent axle（4）Connection, the water pump（32）One end be provided with water inlet（34）.

8. turbo supercharging gasoline engine according to claim 7, it is characterised in that the bent axle（4）Light for low inertia Change amount bent axle, the bent axle（4）Crank（41）It is provided with four balance weights（42）.

9. turbo supercharging gasoline engine according to claim 1, it is characterised in that also include tappet（7）, the tappet （7）Top surface scribbles DLC coating（71）.

10. turbo supercharging gasoline engine according to claim 1, it is characterised in that also include electronic throttle bodies （5）, the electronic throttle bodies（5）Including air intake casing（51）, DC servo motor（52）, wire bundle connector（53）, gear Transmission return mechanism（54）, the DC servo motor（52）, wire bundle connector（53）, gear drive return mechanism（54）Connection In air intake casing（51）On, the wire bundle connector（53）Two-port respectively with DC servo motor（52）, ECU connection, described DC servo motor（52）With gear drive return mechanism（54）Connect and drive its motion.