CN103511151A - Vehicle engine starting system - Google Patents

Abstract

The invention discloses a vehicle engine starting system. The vehicle engine starting system comprises a motor, a water pump, a first clutch and a second clutch, wherein the water pump is used for cooling an engine. The motor comprises an output shaft, wherein one end of the output shaft is connected with the water pump through the first clutch, and the other end of the output shaft is connected with a flywheel of the engine through the second clutch. The first clutch is an electromagnetic clutch and comprises a driving piece and a driven piece, wherein the driving piece is in drive connection with the output shaft of the motor and can rotate along with the output shaft, the driven piece is in drive connection with the water pump so that the water pump can rotate along with the driven piece, the driving piece and the driven piece are respectively provided with teeth, the teeth of the driving piece can be meshed with the teeth of the driven piece, the driving piece can move between the first position and the second position, the driving piece is meshed with the driven piece when located in the first position so that the water pump can be driven to work, the driving piece is not meshed with the driven piece when located in the second position, the driving piece moves from the first position to the second position when the first clutch is powered on, and then the motor starts the engine.

Description

Start system for vehicle engine

Technical field

The present invention relates to a kind of Start system for vehicle engine.

Background technique

Along with the deterioration of earth environment, environmental problem has become the existence problem that people must face, and energy-saving and emission-reduction become the important consideration point of most industries.For complying with the development trend of energy-saving and emission-reduction, automobile vendor is at Devoting Major Efforts To Developing and popularization starting shutdown system, described starting shutdown system in parking under row state (stopping when stopped before red light or running into traffic congestion), temporary close motor, thereby fuel-efficient and reduce exhaust emissions, and when being converted into enforcement state, reset motor.

Existing vehicle motor starting shutdown system, the function singleness of each motor, no longer works as actuating motor has started motor afterwards, and motor utilization ratio is low, and cost is high.

The present invention aims to provide a kind of novel Start system for vehicle engine.

Summary of the invention

The embodiment of the present invention provides a kind of Start system for vehicle engine, comprise motor, the water pump of using for engine cooling, one first clutch and a second clutch, described motor comprises an output shaft, one end of described output shaft is connected with described water pump by described first clutch, the other end is connected with the flywheel of motor by described second clutch, described first clutch is magnetic clutch, described first clutch comprises a driving link and a driven member, the output shaft of described driving link and described motor is in transmission connection and can rotates with output shaft, thereby described driven member and described water pump are in transmission connection water pump can be rotated with driven member, described driving link and driven member are provided with can intermeshing tooth, described driving link can move between a primary importance and a second place, described driving link is meshed with described driven member when primary importance, thereby driving pump working, described driving link when the second place and described driven member depart from engagement, during described first clutch energising, described driving link moves to the second place by primary importance under the effect of magnetic attracting force, motor described in described electric motor starting subsequently.

Sense of rotation when preferably, the sense of rotation of the output shaft of described motor when piloting engine is with driving water pump is consistent.

Preferably, described first clutch also comprises a housing, be contained in winding in described housing, be relatively located at regularly the magnetic conductive part of housing one end, described driving link comprises a body and an engaging piece, described driving link is when primary importance, described engaging piece and described magnetic conductive part are separately, during described first clutch energising, described engaging piece moves to the second place towards magnetic conductive part under the effect of magnetic conductive part.

Preferably, described first clutch also comprises elastic element, described elastic element is resisted against between described engaging piece and described housing, when described driving link moves to the second place by primary importance, described elastic element is compressed, when described magnetic clutch power-off, elastic element recovers elastic strain and promotes described driving link and return back to primary importance.

Preferably, the corresponding described elastic element of described housing is provided with a shrinkage pool, and the end of described elastic element is contained in described shrinkage pool.

Preferably, described first clutch also comprises a pedestal and is contained in the supporting element in the accepting hole of pedestal, described pedestal is contained in described housing relatively regularly, and described elastic element is contained in described supporting element, described supporting element can be in described accepting hole relatively described pedestal friction slip.

Preferably, described elastic element is contained in axial one end of described supporting element, the axial the other end of described supporting element is accommodated a ball, it is outside that described ball partly protrudes from described supporting element, when output shaft when rotation of described driving link with motor, described ball contacts to reduce abrasion with described driving link rolling.

Preferably, the axial two ends of described supporting element are respectively equipped with receiving hole to accommodate respectively described elastic element and ball, described two intervals, receiving hole You Yi isolation part.

Alternatively, described first clutch also comprises a thrust bearing, described thrust bearing comprises the inner ring He Yi outer ring being oppositely arranged, and be located at the some balls between inner ring and outer ring, thereby described inner ring and described driving link are connected and fixed and can together rotate with driving link, separately, exterior edge face and the housing of described outer ring are supported respectively in the axial two ends of described elastic element for the interior week of described outer ring and described driving link.

Alternatively, described driving link also comprises the clamping part between engaging piece and body, and the external diameter of described clamping part is less than the external diameter of described engaging piece and is greater than the external diameter of described body, and the inner ring of described thrust bearing tightly fits in the periphery of described clamping part.

Preferably, described housing comprises an end plate and the sidewall extending from the periphery of end plate, and the central authorities of described end plate are provided with a center pillar, and described drum is sheathed on the periphery of center pillar, the internal diameter of described elastic element is greater than described drum, and described drum is contained in the endoporus of described elastic element.

Preferably, described first clutch is normally closed.

On the other hand, the present invention also provides a kind of Start system for vehicle engine, comprise motor, the water pump of using for engine cooling, first clutch and second clutch, and controller, described motor comprises an output shaft, one end of described motor output shaft is connected with described water pump by described first clutch, the other end is connected with the flywheel of motor by described second clutch, described first clutch is normally closed magnetic clutch, described controller is connected with motor with first clutch, described controller is configured to when needs starter generator, thereby described controller is controlled first clutch, energising disconnects the transmission between motor output shaft and water pump, and control second clutch and connect transmission between motor output shaft and the flywheel of motor so that electric motor starting motor.

Start system for vehicle engine of the present invention, actuating motor is used as the drive motor of water pump after engine start completes, thereby can save power supply and reduce costs, and is conducive to the optimization control of cooling system of vehicle.

In order further to understand feature of the present invention and technology contents, refer to following about detailed description of the present invention and accompanying drawing, yet institute's accompanying drawing only provide with reference to and explanation use, be not used for the present invention to be limited.

Accompanying drawing explanation

Fig. 1 is the rough schematic view of Start system for vehicle engine of the present invention.

Fig. 2 is the schematic perspective view of the Start system for vehicle engine of first embodiment of the invention.

Fig. 3 is that the Start system for vehicle engine shown in Fig. 2 is removed the schematic diagram after local shell.

Fig. 4 is the exploded view of the Start system for vehicle engine shown in Fig. 2.

Fig. 5 is the motor of Start system for vehicle engine shown in Fig. 4 and another angle schematic diagram of the magnetic clutch part being attached thereto.

Fig. 6 is the constitutional diagram of the magnetic clutch of Start system for vehicle engine shown in Fig. 4.

Fig. 7 is the generalized section of magnetic clutch shown in Fig. 6.

Fig. 8 is the three-dimensional combination figure of magnetic clutch of the Start system for vehicle engine of second embodiment of the invention.

Fig. 9 is the exploded view of magnetic clutch shown in Fig. 8.

Figure 10 is the generalized section of magnetic clutch shown in Fig. 8.

Embodiment

Below in conjunction with accompanying drawing, by the specific embodiment of the present invention is described in detail, will make technological scheme of the present invention and other beneficial effects apparent.

Refer to Fig. 1 to Fig. 3, the Start system for vehicle engine of first embodiment of the invention, the water pump 20 of comprise motor 10, using for engine cooling, first clutch 30, and second clutch 40 and controller.Described motor 10 comprises an output shaft 12.Described output shaft 12 one end is connected with water pump 20 by first clutch 30, and the other end of output shaft 12 is connected with the flywheel 52 of a motor 50 by second clutch 40.Described second clutch 40 is driven by shift fork 17, and described shift fork 17 is driven by electromagnet 18.Described second clutch 40 has a small gear 42.Described motor 10 is controlled by electric machine controller 62 and is worked or quit work.When described second clutch 40 is rotated by output shaft 12 drivings of motor 10, described small gear 42 synchronous rotaries.During electromagnet 18 energising, shift fork 17 is attracted near electromagnet 18 one end, thereby makes outwards to dial described second clutch 40 near second clutch 40 one end, makes the small gear 42 and flywheel 50 engagements of second clutch 40, thereby can pilot engine 50.

Described first clutch 30 is magnetic clutch, and described motor 10 optionally drives water pump 20 or pilots engine 50 according to the different conditions of first clutch 30 (closed/to disconnect).Described first clutch 30 is controlled by first clutch controller 64 and closed or disconnect, and particularly, when magnetic clutch 30 is during in closed state, described motor 10 drives water pump 20 with the first rotating speed; And while needing starter generator, magnetic clutch 30 is switched on and is disconnected, second clutch 40 is subject to 66 controls of second clutch controller and connects the transmission between motor output shaft and engine flywheel 52, motor 10, under the control of electric machine controller 62, pilots engine 50 with the second rotating speed higher than the first rotating speed immediately.That is to say, first clutch 30 is normally closed, thereby make motor can drive for a long time water pump 20, only at needs, pilot engine in 50, first clutch 30 just can disconnect under the control of first clutch controller 64, and closed after motor 50 has started, continue to drive water pump 20 work.Motor 10 50 sense of rotation when driving water pump 20 of piloting engine are consistent.In the present embodiment, described output shaft 12 is connected to second clutch 40 by a gear-box 60.

Please refer to Fig. 4 and Fig. 5, described magnetic clutch 30 comprises a housing 31, be fixed on a drum 32 in housing 31, be wound in winding 33 on drum 32, be contained in drum 32 central authorities a pedestal 34, be located at a driving link 35 of drum 32 axial one end, the magnetic conductive part 36 between drum 32 and driving link 35, and can with the intermeshing driven member 37 of driving link 35.Described driven member 37 is connected with described water pump 20, thereby drives water pump 20 work when driven member 37 rotates with driving link 35.

Described housing 31 is cylindric, and it comprises an end plate 312 and from the vertically extending sidewall 314 of periphery of end plate 312.The central authorities of described end plate 312 are provided with a perforation 315, for the output shaft 12 of power supply machine 10, pass.Described end plate 312 is arranged with some attachment holes 316 in the outer of perforation 315, for passing for fixed block, thereby is connected with the end cap of motor 10.

On described pedestal 34, corresponding described attachment hole 316 is provided with the fixed hole 341 running through vertically.During assembling, fixed block, as the fixed hole 341 through pedestal 34 such as screw, and further through after the attachment hole 316 of end plate 312, is connected with the end cap of motor 10, thereby makes pedestal 34, housing 31 relative with motor 10 fixing.The central authorities of described pedestal 34 are provided with center hole.Preferably, fixing bearing 38 in described center hole.

Please refer to Fig. 6 and Fig. 7, described pedestal 34 is arranged with some accepting holes 342 in center hole outer.Preferably, described accepting hole 342 and described fixed hole 341 being circumferentially arranged alternately along pedestal 34.In each accepting hole 342, be provided with an elastic element 343.Preferably, described elastic element 343 is a stage clip.Preferably, described elastic element 343 is located in the supporting element 344 being placed in accepting hole 342.The end plate 312 of described supporting element 344 and described housing 31 is supported respectively at the axial two ends of described elastic element 343.Preferably, the corresponding described elastic element 343 of the end plate 312 of described housing 31 is provided with shrinkage pool 317, for accommodating elastic element 343 end, thereby elastic element 343 is kept in position.Can be in interior relative pedestal 34 friction slip of accepting hole 342 when supporting element 344 is stressed.When elastic element 343 is during in original state, described supporting element 344 protrudes from the outside of pedestal 34 away from end plate 312 one end of housing 31.

Preferably, described elastic element 343 is contained in axial one end of supporting element 344, and the axial the other end of supporting element 344 is accommodated a ball 345.Described ball 345 only part is contained in supporting element 344, thereby ball 345 parts protrude from supporting element 344 outsides.The axial two ends of described supporting element 344 are respectively equipped with receiving hole for accommodating described elastic element 343 and ball 345.In the present embodiment, the receiving hole at described supporting element 344 two ends is spaced from each other.In other embodiments, described two receiving holes also can be connected, but between two receiving holes, an isolation part should be set.

Described magnetic conductive part 36 is roughly circular, and it is fixed on housing 31 away from end plate 312 one end.Described magnetic conductive part 36 is provided with the hole of dodging that can pass for supporting element 344.

Described driving link 35 comprises a body 351 and is positioned at an engaging piece 352 of body 351 ends.Described body 351 is through being supported by described bearing 38 after described magnetic conductive part 36.Described body 351 is roughly cylindric, its central authorities be provided with one can power supply machine 10 the matching hole 353 that passes of output shaft 12.Described body 351 is also provided with the keyway 354 being connected with described matching hole in the periphery of matching hole 353.On the output shaft 12 of described motor 10, be also provided with corresponding keyway 13 (seeing Fig. 5), described output shaft 12 is arranged in the matching hole 353 of described driving link 35, and connects driving link 35 by a key 15.Described key 15 is arranged in the keyway 354,13 of driving link 35 and output shaft 12, makes driving link 35 to rotate and to rotate with output shaft 12.Understandably, in other embodiments, output shaft and driving link can be in transmission connection by forming non-circular fitting surface realization.Described driving link 35 is output shaft 12 endwisely slipping along output shaft 12 relatively.

Described engaging piece 352 is plate-like, and its external diameter is greater than the external diameter of described body 351.The end of described supporting element 344 is through the rear inner side near described engaging piece 352 of described magnetic conductive part 36, and the Surface Contact of described ball 345 and described engaging piece 352.The outside that described engaging piece 352 deviates from described body 351 is provided with some teeth 355 that extend vertically.The corresponding described driving link 35 of described driven member 37 is also provided with some teeth 375 that extend in opposite directions.Described driving link 35 and driven member 37 in the axial direction mutually near time can be intermeshing; Driving link 35 departs from engagement during away from driven member 37.

When magnetic clutch 30 is in original state, in the situation of not switching on, described elastic element 343 is supported described supporting element 344, and then by ball 345, support the engaging piece 352 of described driving link 35, described driving link 35 is engaged with near driven member 37, thereby motor 10 drive described water pump 20 by magnetic clutch 30.Now, one gap 39, interval between the engaging piece 352 of described driving link 35 and described magnetic conductive part 36.The end of described ball 345 rolls and contacts with the engaging piece 352 of described driving link 35, thereby avoids engaging piece 352 and supporting element 344 direct friction.When magnetic clutch 30 energising, magnetic conductive part 36 described in the magnetic field magnetisation that described winding 33 produces, thereby make the engaging piece 352 of 36 pairs of driving links 35 of magnetic conductive part that an attraction force is provided, attract driving link 35 slide and move towards the direction away from driven member 37 relative to output shaft 12, thereby make driving link 35 and driven member 37 depart from engagement.Now, the engaging piece 352 of driving link 35 near described magnetic conductive part 36 but still with magnetic conductive part 36 interval one micro-gaps.Electromagnet 18 energisings immediately, described shift fork 17 is outwards dialled described second clutch 40, makes the small gear 42 and described flywheel 52 engagements of second clutch 40, thereby pilots engine 50.

It should be noted that second clutch 40 is also driven and rotated by motor 10 simultaneously when motor 10 drives water pump 20 work, and now because electromagnet 18 is not switched on, shift fork 17 is not outwards dialled second clutch 40, and small gear 42 does not mesh with flywheel 52, thereby can not pilot engine 50.

Because driving link 35 is supported supporting element 344 by ball 345 when magnetic conductive part 36 moves, make supporting element 344 towards end plate 312 motions of housing 31, thereby compression elastic element 343, there is a spring-back force in compressed elastic element 343, therefore after motor 50 has started, magnetic clutch 30 power-off, the spring-back force that elastic element 343 produces is supported supporting element 344 and is driven ball 345 towards end plate 312 motions away from housing 31, thereby support described driving link 35 and return back to the position of meshing with described driven member 37, thereby make motor 10 can drive water pump 20 work.

Actuating motor 10 of the present invention is used as the drive motor of water pump 20 after motor 50 has started, thereby can save power supply and reduce costs, and is conducive to the optimization control of cooling system of vehicle.Understandably, vehicle motor 50 starting systems of the present invention can be used as vehicle motor starting shutdown system.In addition, the first clutch of engine starting system of the present invention is magnetic clutch, and this magnetic clutch is to be normally closed magnetic clutch, the response time of its cut-off/close is extremely short, and motor just can realize without changing sense of rotation the device that conversion drives, thereby can from motor driving water pump, convert to and pilot engine 50 in a short period of time.

Fig. 8 is to the magnetic clutch 70 that Figure 10 shows that the engine starting system of second embodiment of the invention.This magnetic clutch 70 also comprises a housing 71, a drum 72, be wound in a winding 73 on drum 72, be located at a magnetic conductive part 76, an elastic element 74, a driving link 77 and a driven member 78 of drum 72 axial one end.The difference of the magnetic clutch 30 in this magnetic clutch 70 and above-described embodiment is: the central authorities of the end plate 712 of described housing 71 form a center pillar 716.The interior formation through hole of center pillar 716.Described drum 72 is sheathed on outside center pillar 716.Bearing 38 is contained in center pillar 716 for supporting described driving link 77.In addition, the quantity of the elastic element in the present embodiment 74 is only one.The internal diameter of described elastic element 74 is greater than the external diameter of described drum 72.Described elastic element 74 is located on the periphery of drum 72.That is to say, described drum 72 is contained in the endoporus of elastic element 74.

Described driving link 77 comprises a body 771, an engaging piece 773, and the clamping part 772 between body 771 and engaging piece 773.The external diameter of described engaging piece 773, clamping part 772, body 771 reduces successively.Described body 771 is through being supported by described bearing 38 after described magnetic conductive part 76.The output shaft 12 of motor 10 penetrates body 771 combinations of center pillar 716 and driving link 77 from the other end of housing 71.The axial end of described clamping part 772 is relative with described magnetic conductive part 76.Different from above-described embodiment, what on the body 771 of the driving link 77 of the present embodiment, offer is spline 774, and is formed and coordinate with the output shaft 13 of motor by spline (not shown).

In addition, described magnetic clutch 70 also comprises a thrust bearing 75.Described thrust bearing 75 comprises inner ring 751He parallel and that be oppositely arranged outer ring 752, and is located at the some balls 753 between inner ring 751 and peripheral 752.Described ball 753 is spaced apart by inner ring 751He outer ring 752.The inner ring 751 of described thrust bearing 75 tightly fits in clamping part 772 peripheries of described driving link 77, thereby uses to such an extent that described inner ring 751 can be with described driving link 77 one rotations.Because the external diameter of the body 771 of described driving link 77 is less than the external diameter of described clamping part 772, therefore, described peripheral 752 inner side does not contact described body 771, therefore, and when inner ring 751 rotates with driving link 77 rotation Shi， outer rings 752 thereupon.Between outer ring 752 and inner ring 751, by ball 753, reduce friction.Described inner ring 751 exterior edge face is against the inner side of the engaging piece 773 of described driving link 77.The outside of described outer ring 752 and the end plate 712 of described housing 71 are supported respectively in the axial two ends of described elastic element 74.

When described magnetic clutch 70 is during in original state, described elastic element 74 is supported described thrust bearing 75, by thrust bearing 75, support the engaging piece 773 of described driving link 77, make described driving link 77 and driven member 78 engagements, thereby motor 10 drives water pump 20 work.Now, one gap 79, interval between the clamping part 772 of described driving link 77 and described magnetic conductive part 76.When magnetic clutch 70 energising, magnetic conductive part 76 described in the magnetic field magnetisation that described winding 73 produces, thereby make the engaging piece 773 of 76 pairs of driving links 77 of magnetic conductive part that an attraction force is provided, attract driving link 77 slide and move towards the direction away from driven member 78 relative to output shaft 12, until driving link 77 departs from engagement with driven member 78, now, the clamping part 772 of driving link 77 near described magnetic conductive part 76 but still with magnetic conductive part 76 interval one micro-gaps.Electromagnet 18 energisings immediately, thus pilot engine 50.

The foregoing is only preferred embodiment of the present invention; not in order to limit the present invention; all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc.; as can arranging separately, electric machine controller, first clutch controller, second clutch controller also can be integrated in a controller etc., within all should being included in protection scope of the present invention.

Claims (13)

1. a Start system for vehicle engine, comprise motor, the water pump of using for engine cooling, one first clutch and a second clutch, described motor comprises an output shaft, it is characterized in that: one end of described output shaft is connected with described water pump by described first clutch, the other end is connected with the flywheel of motor by described second clutch, described first clutch is magnetic clutch, comprise a driving link and a driven member, the output shaft of described driving link and described motor is in transmission connection and can rotates with output shaft, thereby described driven member and described water pump are in transmission connection water pump can be rotated with driven member, described driving link and driven member are provided with can intermeshing tooth, described driving link can move between a primary importance and a second place, described driving link is meshed with described driven member when primary importance, thereby driving pump working, described driving link when the second place and described driven member depart from engagement, during described first clutch energising, described driving link moves to the second place by primary importance under the effect of magnetic attracting force, motor described in described electric motor starting subsequently.

2. Start system for vehicle engine as claimed in claim 1, is characterized in that: the sense of rotation of the sense of rotation of the output shaft of described motor when piloting engine when driving water pump is consistent.

3. Start system for vehicle engine as claimed in claim 1, it is characterized in that: described first clutch also comprises a housing, be contained in winding in described housing, be relatively located at regularly the magnetic conductive part of housing one end, described driving link comprises a body and an engaging piece, described driving link is when primary importance, described engaging piece and described magnetic conductive part are separately, during described first clutch energising, described engaging piece moves to the second place towards magnetic conductive part under the effect of magnetic conductive part.

4. Start system for vehicle engine as claimed in claim 3, it is characterized in that: described first clutch also comprises elastic element, described elastic element is resisted against between described engaging piece and described housing, when described driving link moves to the second place by primary importance, described elastic element is compressed, when described magnetic clutch power-off, elastic element recovers elastic strain and promotes described driving link and return back to primary importance.

5. Start system for vehicle engine as claimed in claim 4, is characterized in that: the corresponding described elastic element of described housing is provided with a shrinkage pool, and the end of described elastic element is contained in described shrinkage pool.

6. Start system for vehicle engine as claimed in claim 4, it is characterized in that: described first clutch also comprises a pedestal and is contained in the supporting element in the accepting hole of pedestal, described pedestal is contained in described housing relatively regularly, described elastic element is contained in described supporting element, described supporting element can be in described accepting hole relatively described pedestal friction slip.

7. Start system for vehicle engine as claimed in claim 6, it is characterized in that: described elastic element is contained in axial one end of described supporting element, the axial the other end of described supporting element is accommodated a ball, it is outside that described ball partly protrudes from described supporting element, when output shaft when rotation of described driving link with motor, described ball contacts to reduce abrasion with described driving link rolling.

8. Start system for vehicle engine as claimed in claim 7, is characterized in that: the axial two ends of described supporting element are respectively equipped with receiving hole to accommodate respectively described elastic element and ball described two intervals, receiving hole You Yi isolation part.

9. Start system for vehicle engine as claimed in claim 4, it is characterized in that: described first clutch also comprises a thrust bearing, described thrust bearing comprises the inner ring He Yi outer ring being oppositely arranged, and be located at the some balls between inner ring and outer ring, thereby described inner ring and described driving link are connected and fixed and can together rotate with driving link, separately, exterior edge face and the housing of described outer ring are supported respectively in the axial two ends of described elastic element for the interior week of described outer ring and described driving link.

10. Start system for vehicle engine as claimed in claim 9, it is characterized in that: described driving link also comprises the clamping part between engaging piece and body, the external diameter of described clamping part is less than the external diameter of described engaging piece and is greater than the external diameter of described body, and the inner ring of described thrust bearing tightly fits in the periphery of described clamping part.

11. Start system for vehicle engines as claimed in claim 9, it is characterized in that: described housing comprises an end plate and the sidewall extending from the periphery of end plate, the central authorities of described end plate are provided with a center pillar, described drum is sheathed on the periphery of center pillar, the internal diameter of described elastic element is greater than described drum, and described drum is contained in the endoporus of described elastic element.

12. 1 kinds of Start system for vehicle engines, comprise motor, the water pump of using for engine cooling, first clutch and second clutch, and controller, described motor comprises an output shaft, it is characterized in that: one end of described motor output shaft is connected with described water pump by described first clutch, the other end is connected with the flywheel of motor by described second clutch, described first clutch is normally closed magnetic clutch, described controller is connected with motor with first clutch, described controller is configured to when needs starter generator, thereby described controller is controlled first clutch, energising disconnects the transmission between motor output shaft and water pump, and control second clutch and connect transmission between motor output shaft and the flywheel of motor so that electric motor starting motor.

13. Start system for vehicle engines as claimed in claim 12, is characterized in that: the sense of rotation of the sense of rotation of described motor output shaft when piloting engine when driving water pump is consistent, and the rotating speed of the rotating speed while piloting engine when driving water pump.

Images