CN201232591Y

CN201232591Y - Single-cylinder straight spraying watercooling diesel engine of 85-90mm cylinder diameter

Info

Publication number: CN201232591Y
Application number: CNU2008201313840U
Authority: CN
Inventors: 吴克平; 王珣
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-01
Filing date: 2008-08-01
Publication date: 2009-05-06
Anticipated expiration: 2018-08-01

Abstract

The utility model relates to a single cylinder direct-injection water-cooled diesel engine with a cylinder diameter of 85 to 90 mm. The diesel engine is provided with an air cylinder cover, on which a spiral air inlet channel is arranged. The spiral air inlet channel comprises an air channel inlet, a vortex chamber and an air channel outlet which are integrated. The distance between the central axis of the air channel outlet and the central axis of the air channel inlet is from 6 mm to 9 mm. The distance between the central axis of the air channel outlet and the air channel inlet plane is from 50 mm to 53 mm. The distance between the central axis of the air channel inlet and the air channel outlet plane is from 36 mm to 40mm. In a two-dimension coordinate, in which the upper plane center of the air cylinder cover is origin, the distance between the central axis of the air channel outlet and the X axis of the coordinate axes is from 4 mm to 6 mm. The distance between the central axis of the air channel outlet and the Y axis of the coordinate axes is from 19 mm to 22 mm. Because the spiral air inlet channel with ideal structure and size is arranged on the cylinder cover, inlet flow forms high vortex. The mixture quality of air and fuel is improved and the fuel consumption and the discharge are reduced.

Description

The single-cylinder direct-injection water-cooled diesel engine of 85～90mm cylinder diameter

Technical field

The utility model relates to a kind of single-cylinder direct-injection water-cooled diesel engine of 85～90mm cylinder diameter, and this diesel engine has the spiral inlet duct of function admirable.

Background technique

The influence that the power character of diesel engine with direct injection, Economy are subjected to the air inlet quality is bigger, and the air inlet of diesel engine is fully from the intake duct that is arranged in the cylinder cap, spiral intake duct is paid attention in the industry and is adopted, because higher intake swirl ability has active influence to power character, fuel economy and the exhaust index of complete machine.But spiral intake duct is for the diesel engine of little cylinder diameter, and the layout of intake duct trend is subjected to the restriction of cylinder cap self structure size, is not easy to realize high-eddy.The rotating speed of China's small-sized single cylinder diesel engine is lower than 3000 rev/mins mostly, take to increase the way of " training wall " generally speaking, forced draft enters cylinder along the water conservancy diversion direction of expection, produce high-eddy with this, but, make to reduce charge flow rate, increase intake resistance in this way, this situation is very disadvantageous for the motor that needs the oxygen-enriched combusting acting.

The model utility content

The technical problems to be solved in the utility model is: the single-cylinder direct-injection water-cooled diesel engine that a kind of 85～90mm cylinder diameter of the spiral inlet duct with premium properties is provided, solve air flue difficult arrangement on cylinder head of present single cylinder direct injection diesel engine, the problem of intake swirl poor effect.

The technical solution adopted in the utility model is: a kind of single-cylinder direct-injection water-cooled diesel engine of 85～90mm cylinder diameter, has cylinder head, cylinder head is provided with spiral inlet duct, spiral inlet duct includes air flue import, vortex chamber and the air flue outlet of integral type, the distance of the central axis of air flue outlet and the central axis of air flue import is 6～9mm, the central axis of air flue outlet is 50～53mm to the distance of air flue inletpiston, and the central axis of air flue import is 36～40mm to the distance of air flue pelvic outlet plane; If is that initial point is set up two-dimensional coordinate with planar central on the cylinder head, then the central axis of air flue outlet is 4～6mm to the distance of coordinate axes X-axis, is 19～22mm to the distance of coordinate axes Y-axis.

For optimizing the structure of spiral inlet duct, make induction swirl ratio and energetic coefficient reach coupling preferably, the vortex chamber of described spiral inlet duct is by tangent be connected to form spiral-shaped of the three-dimensional circular arc head and the tail of multistage, by the eddy current center laterally, the radius of each section circular arc is respectively: R1:17～19mm, R2:20～22mm, R3:26～28mm, R4:38～41mm, R5:320～325mm, R6:65～69mm, R7:8～10mm, R8:10～12mm, R9:11～13mm, R10:10～12mm, R11:155～158mm, R12:16～18mm.

Be partly with the conduit boss of one in the vortex chamber, the end face of conduit boss is 28～30mm to the distance of air flue pelvic outlet plane.

The beneficial effects of the utility model are: be furnished with structure and the desirable spiral inlet duct of size on the cylinder head of the single-cylinder direct-injection water-cooled diesel engine of this 85mm cylinder diameter, it can make inlet stream form higher eddy current, and influence charge flow rate hardly, do not increase intake resistance yet, therefore significantly improve the mixing quality of air and fuel oil, reduced oil consumption and discharging.

Description of drawings

Fig. 1 is the position relational structure schematic representation of spiral inlet duct of the present utility model and cylinder head.

Fig. 2 is the main TV structure schematic representation of spiral inlet duct of the present utility model.

Fig. 3 is the structural representation of looking up of spiral inlet duct of the present utility model.

Among the figure: 1. air flue import 2. vortex chambers 3. air flues export 4. conduit boss

Embodiment

The single-cylinder direct-injection water-cooled diesel engine of a kind of 85～90mm cylinder diameter as shown in Figure 1, has cylinder head, cylinder head is provided with spiral inlet duct, spiral inlet duct includes air flue import 1, vortex chamber 2 and the air flue outlet 3 of integral type, the central axis of air flue outlet 3 and the central axis of air flue import 1 be 6～9mm apart from M, the central axis of air flue outlet 3 is 50～53mm to the distance L on air flue import 1 plane, and the central axis of air flue import 1 is 36～40mm to the distance H that air flue exports 3 planes; If is that initial point is set up two-dimensional coordinate with planar central on the cylinder head, then the central axis of air flue outlet 3 to the coordinate axes X-axis be 4～6mm apart from B, be 19～22mm to the distance A of coordinate axes Y-axis.

The vortex chamber 2 of described spiral inlet duct is by tangent be connected to form spiral-shaped of the three-dimensional circular arc head and the tail of multistage, by the eddy current center laterally, the radius of each section circular arc is respectively: R1:17～19mm, R2:20～22mm, R3:26～28mm, R4:38～41mm, R5:320～325mm, R6:65～69mm, R7:8～10mm, R8:10～12mm, R9:11～13mm, R10:10～12mm, R11:155～158mm, R12:16～18mm.

The 2 conduit boss 4 that are partly with one in the vortex chamber, the end face of conduit boss 4 is 28～30mm to the distance h that air flue exports 3 planes.

Claims

1. the single-cylinder direct-injection water-cooled diesel engine of 85～90mm cylinder diameter, has cylinder head, cylinder head is provided with spiral inlet duct, spiral inlet duct includes air flue import (1), vortex chamber (2) and the air flue outlet (3) of integral type, it is characterized in that: the central axis of air flue outlet (3) and the central axis of air flue import (1) be 6～9mm apart from M, the central axis of air flue outlet (3) is 50～53mm to the distance L on air flue import (1) plane, and the central axis of air flue import (1) is 36～40mm to the distance H on air flue outlet (3) plane; If is that initial point is set up two-dimensional coordinate with planar central on the cylinder head, then the central axis of air flue outlet (3) to the coordinate axes X-axis be 4～6mm apart from B, be 19～22mm to the distance A of coordinate axes Y-axis.

2. the single-cylinder direct-injection water-cooled diesel engine of 85mm cylinder diameter according to claim 1, it is characterized in that: the vortex chamber of described spiral inlet duct (2) are by tangent be connected to form spiral-shaped of the three-dimensional circular arc head and the tail of multistage, by the eddy current center laterally, the radius of each section circular arc is respectively: R1:17～19mm, R2:20～22mm, R3:26～28mm, R4:38～41mm, R5:320～325mm, R6:65～69mm, R7:8～10mm, R8:10～12mm, R9:11～13mm, R10:10～12mm, R11:155～158mm, R12:16～18mm.

3. the single-cylinder direct-injection water-cooled diesel engine of 85mm cylinder diameter according to claim 1 is characterized in that: (2) are partly with the conduit boss (4) of one in the vortex chamber, and the end face of conduit boss (4) is 28～30mm to the distance h on air flue outlet (3) plane.