CN201165906Y - Motor vehicle engine structure - Google Patents

Abstract

A motor structure of a motor vehicle comprises a cylinder head (1), a cam (2), a valve stem (3), a valve stem tappet (4) and an inlet valve and an exhaust valve (5). An acting mechanism is arranged on the cylinder head (1), which comprises an eccentric shaft (6) and a shift fork (7), wherein one end of the shift fork (7) pushes against the eccentric shaft (6) and the other end is in abutting joint with the valve stem tappet (4), and the eccentric shaft (6) is connected with an output shaft of an actuating motor. The motor structure of a motor vehicle is capable of eliminating reverse driving of a motor vehicle in a condition without fuel supplying in running, and enables the motor vehicle to run farther by inertia, thereby achieving the effect of saving energy.

Description

A kind of motor car engine structure

Technical field

The utility model relates to a kind of structure of motor car engine.

Background technique

During motor vehicle starting, keep motor and be called free idling with the stable rotating speed that runs well of minimum speed; And some special state in vehicle driving, as long descending, the engine speed when vehicle is forced to travel by self inertia is called forced idling.Motor is referred to as the idling oil consumption with oil mass under above-mentioned two kinds of operating modes.Oil consumption during free idling is necessary, is used for keeping the minimum running of motor; And the oil consumption during forced idling then there is no need fully, because this moment, vehicle relies on self inertia to force to advance, and need not motor driving power is provided, and fuel feeding at this moment is a kind of great waste.

In fact, from the whole service process of Motor Vehicle, the factor that influences the Motor Vehicle cumulative fuel consumption not only is the fuel feeding problem on opportunity under the different operating modes, and " counter dragging " phenomenon also is a problem that can not be ignored.So-called " counter dragging " be mean engine under situation not out of supply, rely on inertia positive to move ahead, vehicle forms the phenomenon of reverse towing tension to motor, at this moment throttle is in oil return state or idle position.Although (as utilizing engine retard or when braking) counter dragging is positive, necessary under the situation that has, in most cases, this anti-phenomenon of dragging but is unnecessary, passive.Stepping on the gas when according to statistics, the ordinary people drives a car and refueling the endurance probably is 4: 1 with unclamping the throttle oil return time ratio of (comprising the time of touching on the brake).If with oil return during this period of time the anti-phenomenon of dragging of motor eliminate, Motor Vehicle will advance fartherly by inertia, thereby can yet be regarded as a kind of method for saving energy, also be a kind of approach of covert fuel-economizing.

The model utility content

Problem to be solved in the utility model provides a kind of in the motor-driven vehicle going process, can realize energy-conservation motor car engine structure by eliminating the anti-phenomenon of dragging of motor.

For solving the problems of the technologies described above, the utility model is to realize by such technological scheme: a kind of motor car engine structure, comprise cylinder head, cam, valve stem, valve masthead tube and inlet and outlet door, cylinder head is provided with actuating mechanism, this actuating mechanism comprises eccentric shaft and fork, fork one end is butted on the eccentric shaft, and the other end is connected on the valve masthead tube, and eccentric shaft is connected with the drive motor output shaft.

The work of motor is divided into air inlet, compression, acting and four circulations of exhaust, and in air inlet and exhaust process, intake valve or exhaust valve are opened, and piston moves smooth and easy in cylinder body, the anti-phenomenon of dragging can not occur; In compression and acting process, because the inlet and outlet door is in closed condition, if motor fuel feeding not, then there is not mixture combustion, if at this moment Motor Vehicle relies on inertia advancing, then piston can hinder because of the malleation in the firing chamber or negative pressure form the rotation of bent axle, the anti-phenomenon of dragging promptly occurs.As seen, if when throttle not fuel feeding and motor be in and instead allow inlet and outlet Men Jun be in opening state when dragging operating mode, just can eliminate malleation or negative pressure in burning, thus the anti-phenomenon of dragging of elimination.Counter drag phenomenon to eliminate after, Motor Vehicle relies on inertia can advance fartherly, thereby realizes energy-conservation.In the utility model, fuel feeding and motor are not in anti-when dragging operating mode when throttle, the Motor Vehicle automatical control system sends instruction rotates motor, the output shaft of motor drives eccentric shaft and rotates together, eccentric shaft promotes valve masthead tube by fork and moves a certain distance towards the firing chamber direction together with valve stem in rotation process, the inlet and outlet door all can not be closed fully, promptly is in the gas leakage state, eliminate malleation or negative pressure in compression, the working stroke, thereby eliminated counter dragging; When throttle recovery fuel feeding, brake or engine speed were reduced near idling, automatical control system sent the counter-rotating of command control motor, so that valve stem resets.The automatical control system of existing electronic fuel injection engine calculates, judges and send above-mentioned instruction according to the detection information that obtains.

The beneficial effects of the utility model are: can effectively eliminate counter the drag phenomenon of Motor Vehicle under fuel feeding state not in advancing, make Motor Vehicle rely on inertia to advance fartherly, thereby reach energy-conservation effect.

Description of drawings

Fig. 1 is the schematic representation when valve stem 3 is in reset mode in the utility model.

Fig. 2 makes valve closing state schematic representation fully after valve stem 3 moves in the utility model.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

As shown in Figure 1 and Figure 2, motor car engine structure of the present utility model, have cylinder head 1, cam 2, valve stem 3, valve masthead tube 4 and inlet and outlet door 5, cylinder head 1 is provided with actuating mechanism, this actuating mechanism is made of eccentric shaft 6, fork 7 and drive motor, drive motor does not draw in the drawings, fork 7 one ends are butted on the eccentric shaft 6, the other end is connected on the valve masthead tube 4, the power that fork can be applied towards the firing chamber direction valve masthead tube 4, eccentric shaft 6 is connected with the drive motor output shaft.The drive signal input interface of drive motor is connected with the signal output interface of electronic fuel injection engine ECU, and ECU calculates, judges and send instruction and come the controlling and driving motor rotation according to the detection information that obtains.

Can find out from Fig. 1, Fig. 2, on valve masthead tube 4 and cam 2 opposing end faces, buffering pressing plate 9 is installed by damping spring 8, damping spring 8 is positioned in the groove on valve masthead tube 4 end faces, and on the sidewall of groove, be provided with step be used for buffering pressing plate 9 is carried out spacing, buffering pressing plate 9 when being depressed into extreme lower position by cam 2 its upper surface concordant with the end face of valve masthead tube 4.When valve stem 3 when the firing chamber direction moves down certain distance, bigger valve clearance can appear between valve masthead tube 4 upper-end surfaces and cam 2, engine noise is increased, at this moment cushion pressing plate 9 and under the effect of damping spring 8, fit with cam 2 all the time, just played the effect of eliminating the valve clearance.Because buffering pressing plate 9 is fitted all the time with cam 2, eliminated noise simultaneously because of existing big valve clearance to produce.

Working principle: the Motor Vehicle in advancing is when being totally released gas pedal or manual accelerator control, if Motor Vehicle continues to move ahead by inertia, at this moment the complete fuel cut-off of the throttle of electronic fuel injection engine meeting, ECU judges and sends instruction according to these information, make motor rotation, eccentric shaft 6 promotes valve masthead tube 4 by fork 7 in rotation process, valve stem 3 moves a certain distance towards the firing chamber direction together, make into, exhaust valve all can not cut out fully, promptly be in the gas leakage state, (as shown in Figure 2), piston is last, under just do not have malleation or negative pressure when moving, thereby eliminate motor the counter of vehicle dragged.When throttle recovers fuel feeding, or brake operation occurs, or engine speed is when being reduced near idling, ECU sends instruction and makes motor antiport equal angular, so that valve stem 3 resets (as shown in Figure 1).In this process, Motor Vehicle can be eliminated the unnecessary anti-energy consumption of dragging in the time period of motor fuel cut-off, relies on the inertia farther distance of advancing, and has realized energy-conservation.

Claims (2)

1. a motor car engine is constructed, comprise cylinder head (1), cam (2), valve stem (3), valve masthead tube (4) and inlet and outlet door (5), it is characterized in that: described cylinder head (1) is provided with actuating mechanism, this actuating mechanism comprises eccentric shaft (6) and fork (7), fork (7) one ends are butted on the eccentric shaft (6), the other end is connected on the valve masthead tube (4), and eccentric shaft (6) is connected with the drive motor output shaft.

2. a kind of motor car engine structure according to claim 1 is characterized in that: by damping spring (8) buffering pressing plate (9) is installed on described valve masthead tube (4) and cam (2) opposing end faces.

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