CN2580121Y - Mini car rear wheel driving gasoline engine - Google Patents

Abstract

The utility model relates to a gasoline engine which is suitable for driving rear wheels of a minitype automobile. The arrangement of a single-cylinder four-air valve and four-cylinder, a single overhead camshaft, a type line containing a new cam, and timely arrangement are adopted by the gasoline engine which is suitable for driving rear wheels of a minitype automobile. 4 multiplies 4 cams for directly driving four cylinders and sixteen air valves are arranged on the single overhead camshaft. An air inlet rock arm shaft is adopted to support an air inlet rock arm. A clamping spring structure of a universal joint ball hinge is adopted to support an exhaust rock arm. A sail top shape is adopted by a combustion chamber. A sparking plug is arranged in the combustion chamber. A multi-point and double-bundle electric control spray nozzle device is adopted by a fuel electric control jet system. An inner engaging gear pump with a standard swing line is adopted by an engine oil pump, and is directly driven by the single overhead camshaft. The gasoline engine which is suitable for driving rear wheels of a minitype automobile has the advantages of excellent power performance, high high-speed performance, and large torque. The discharge of the gasoline engine which is suitable for driving rear wheels of a minitype automobile can achieve the standard environmental protection requirement of European II/III, and the gasoline engine which is suitable for driving rear wheels of a minitype automobile has low cost, light weight, and good versatility. The gasoline engine which is suitable for driving rear wheels of a minitype automobile can be suitable for the requirements that a minibus is developed towards comfortable performance and a luxury type.

Description

A kind of minicar rear wheel drive petrol engine

Technical field: the utility model relates to a kind of petrol engine, particularly a kind of petrol engine that is applicable to that the minicar rear wheel drive is used.

Background technique: the petrol engine of minicar use now, mostly adopt structure as depicted in figs. 1 and 2, by Single Over Head Camshaft (1), two pitman arm shafts (2), intake and exhaust rocking arm (3), single valve spring (4), the distribution device of single cylinder 2 valves-intake valve (5) and exhaust valve (6) configuration, four cylinder (I, II, II, IV) total valve 2 * 4=8, camshaft (1) 2 cam-intake cams of single cylinder (15) and exhaust cam (16), totally 8 cams, drive intake and exhaust rocking arm (3) respectively, the intake and exhaust rocking arm is a pivot swinging with pitman arm shaft (2) respectively separately, the inspiration and the discharge of fresh air and useless combustion gas are finished in the switching of control intake valve (5) and exhaust valve (6).Firing chamber (7) is many spherical combustion chambers structure, uses Carburetor (11), has mechanical type distributor (12), and spark plug (8) is tilting structure; The interior engagement involute gear pump that oil pump (9) adopts bent axle (10) directly to drive, external gear (19) and its gear teeth of internal gear (18) are involute.

The shortcoming of this motor is that the high speed power performance is relatively poor, and the pollution emission environment is serious.

Summary of the invention: the purpose of this utility model provides a kind of minicar rear wheel drive petrol engine of function admirable, and it has high high speed characteristics and big moment of torsion, and thermal efficiency height, and sufficient combustion, exhaust emissions reach the environmental requirement of Europe II/III standard.

The utility model comprises by piston, connecting rod, the connecting rod that crankshaft-flywheel etc. constitute, by cylinder head, body (cylinder block+crankcase), the fixed block group that oil sump etc. constitute, by oil nozzle, fuel tank, the fuel supply system that fuel pump etc. constitute, by spark plug, high-tension coil, the ignition system that high voltage damper etc. constitute, by distribution cam axle; pitman arm shaft; the distribution device that intake valve and exhaust valve etc. constitute;; the air inlet system and exhaust system that baffler etc. are formed;; the lubrication system that oil filter etc. are formed;; the timing transmission system that timing cingulum etc. constitute; cooling system; starting system; power supply; electric-control motor management system etc. are characterized in by timing gear by oil pump by intake manifold; gas exhaust manifold; air-strainer:

A. cylinder head adopts single cylinder four valves four cylinders to arrange that each cylinder has two intake valves, two exhaust valves;

B. distribution device adopts Single Over Head Camshaft, comprises new cam profile and timing configuration, on the camshaft

4 * 4 cams that 16 valves of direct driving four cylinders are arranged, intake rocker support and adopt intake rocker

Axle, exhaust rocker arm support and adopt univesal sphere hinge jump ring structure, and intake rocker and exhaust rocker arm are driven

Part is disposed at the upper and lower both sides of cam respectively;

C. fluffy top type, interposed structure in the spark plug are adopted in the firing chamber;

D. the fuel oil electric-controlling injection system adopts multiple spot, the automatically controlled spray nozzle device of two-beam;

E. the accurate cycloid gear pump of engagement was directly driven by bent axle in oil pump adopted.

The utlity model has good power performance, it has the characteristics of high high speed characteristics and big moment of torsion, its discharging can reach the environmental requirement of Europe II/III standard, and its cost is low, in light weight, versatility is good, but the adaptive surface hired car is to the demand of travelling comfort and luxury development.

Description of drawings: Fig. 1 is that prototype sectional arrangement drawing, Fig. 2 are the sectional drawing of prototype oil pump for prototype drawing in side sectional elevation, Fig. 3, Fig. 4 is a sectional arrangement drawing of the present utility model, Fig. 5 is a distribution device schematic representation of the present utility model, Fig. 6 is a distribution device schematic representation of the present utility model, Fig. 7 is an oil pump schematic representation of the present utility model, and Fig. 8 is a drawing in side sectional elevation of the present utility model.

Embodiment: the utility model is described further below in conjunction with accompanying drawing.

Before the utility model is applied on mini van or the truck etc., vertical postpone wheel drive motor, he adopts many Valves Technology, its structure is made up of single cylinder overhead camshaft (20), camshaft (20) has 16 to advance, exhaust cam, each cylinder has 2 intake cams (21), 2 exhaust cams (22), 2 * 4=8 intake cam arranged respectively, 2 * 4=8 exhaust cam, have 16 cams, 4 pairs of intake rockers (23) are arranged, 8 exhaust rocker arms (23), (30) 8 of intake valves, (31) 8 of intake valves, the employing combined type (in, valve spring (25) outward), single intake rocker axle (26), 2 * 4 exhaust rocker arms (24) support with universal spherical joint chain apparatus (27), form the distribution device device of single cylinder 4 valves.

Type firing chamber, fluffy top (28) is adopted in the firing chamber, and spark plug (29) is mid-, and spark plug is disposed at directly over the firing chamber (28) and places the centre of four valves, can improve compression ratio and combustion efficiency like this.

The accurate cycloidal gear oil pump of interior engagement that oil pump adopts bent axle directly to drive, it is made up of cycloidal gear rotor (32) and cycloidal gear (33), and this lubricating condition for many valve distribution mechanisms is greatly improved.

Bent neck (A) thickening of bent axle of the present utility model (34), crankshaft main journal (35) and cylinder body main bearing support (36) width and diminish, also corresponding the reducing of main box (37) width, but keep the main box structure of prototype constant, increase strength of crankshaft like this, prolonged its life-span.

The utility model adopts the fuel direct injection electric controller of Wanyuan-Delphi, its outstanding advantage is multiple spot, two-beam nozzle, no distributor, this nozzle has diplopore, can spray two bundle fuel oils simultaneously, directly enter in two intake ducts of single cylinder, saved the distributor (12) of prototype like this, reduced cost, toxic emission reduces greatly, and the control of ignition timing is read camshaft speed by camshaft speed sensor (38) and obtained tach signal.

Introduce the structure of distribution device of the present utility model below, in cylinder cap (39) top right top, single camshaft (20) is housed, each 8 of intake cam (21), exhaust cams (22) are arranged on the camshaft (20), corresponding each single cylinder respectively has 2, intake cam (21) drives intake rocker (23), intake rocker (23) is swung around single intake rocker axle (26), thereby overcome the external force of the inside and outside valve spring (25) of combined type etc. and control the opening and closing of intake valve (30), intake rocker (23) is positioned at the upper left side of camshaft.For compact structure, weight reduction, reduce cost, noise attenuation, satisfy at a high speed, exhaust rocker arm (24) is arranged in the below of camshaft, the cancellation pitman arm shaft is as supporting pivot, adopt univesal sphere hinge jump ring device (27) to realize, exhaust cam (22) drives the centre of sphere swing of exhaust rocker arm (24) around univesal sphere hinge (27), thus the opening and closing of control exhaust valve.Spring (25) adopts combined variable pitch valve spring, helps at a high speed and the raising of reliability; Jump ring (40) in the univesal sphere hinge jump ring device (27) can be eliminated excessive gap and cause the noise that vibrates and cause, and guarantees good assembling maintainability.

2 intake valves of each single cylinder configuration of tiny engine, 2 exhaust valves have increased negotiability, have improved charging efficiency, thereby have improved high speed performance, can obtain big power and moment of torsion.

Claims (3)

1. minicar rear wheel drive petrol engine, comprise by piston, connecting rod, the connecting rod that crankshaft-flywheel etc. constitute, by cylinder head, body (cylinder block+crankcase), the fixed block group that oil sump etc. constitute, by oil nozzle, fuel tank, the fuel supply system that fuel pump etc. constitute, by spark plug, high-tension coil, the ignition system that high voltage damper etc. constitute, by distribution cam axle; pitman arm shaft; the distribution device that constitutes by intake valve and exhaust valve etc.;; the air inlet system and exhaust system that baffler etc. are formed;; the lubrication system that oil filter etc. are formed;; the timing transmission system that timing cingulum etc. constitute; cooling system; starting system; power supply; electric-control motor management system etc. is characterized in that by timing gear by oil pump by intake manifold; gas exhaust manifold; air-strainer:

A. cylinder head adopts single cylinder four valves four cylinders to arrange that each cylinder has two intake valves, two exhaust valves;

B. distribution device adopts Single Over Head Camshaft, have on the camshaft 4 of 16 valves of direct driving four cylinders *

4 cams, intake rocker support and adopt intake rocker axle, exhaust rocker arm to support the employing universal spherical joint

Chain jump ring structure, intake rocker and exhaust rocker arm driven member are disposed at the upper and lower both sides of cam respectively;

C. fluffy top type, interposed structure in the spark plug are adopted in the firing chamber;

E. the fuel oil electric-controlling injection system adopts multiple spot, the automatically controlled spray nozzle device of two-beam;

F. the accurate cycloid gear pump of engagement was directly driven by bent axle in oil pump adopted.

2. minicar rear wheel drive petrol engine according to claim 1 is characterized in that: the bent cheek thickening of bent axle, and main journal and main bearing hole of cylinder support width diminish, and the main axle bush width reduces up and down, and it adopts the band tank structure.

3. minicar rear wheel drive petrol engine according to claim 1 is characterized in that: valve spring adopts combined variable pitch spring.

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