CN202827978U

CN202827978U - Motorcycle engine

Info

Publication number: CN202827978U
Application number: CN201220466902.0U
Authority: CN
Inventors: 林健明
Original assignee: Jiangmen Dachangjiang Group Co Ltd
Current assignee: Jiangmen Dachangjiang Group Co Ltd
Priority date: 2012-09-13
Filing date: 2012-09-13
Publication date: 2013-03-27
Anticipated expiration: 2022-09-13

Abstract

The utility model discloses a motorcycle engine which comprises an engine box body arranged below a carframe cant beam. An air cylinder body is arranged at the front end of the engine box body in an upward and inclined mode. An air cylinder head is arranged at the front end of the air cylinder body. An air inlet system arrangement space is formed by the air cylinder body, the air cylinder head and the carframe cant beam. The corresponding positions of the air cylinder body, the air cylinder head and the carframe cant beam are not changed. An inclined angle formed by a center line of an inner cylinder sleeve of the air cylinder body relative to the horizontal plane is not changed. The engine box body moves upward entirely, namely the center of a bearing hole of a crank shaft of the engine box body offset upward to the upward side of the center line of the inner cylinder sleeve of the air cylinder body, and therefore the air inlet system arrangement space formed by the air cylinder body, the air cylinder head and the carframe cant beam is not changed. The requirement of an air inlet pipeline system arrangement is met, and at the same time, the liftoff distance of the engine box body is increased. The contradiction between the air inlet system arrangement space and the liftoff distance of the engine in the prior art is solved, and various performance requirements that the motorcycle drives in a mountainous area and other unpaved roads are met.

Description

A kind of motor cycle engine

Technical field

The utility model relates to a kind of motor cycle engine.

Background technology

Quickening along with national urbanization process, the recoverable amount of city vehicle sharply expands, whole nation restriction motor bike, forbid that the current city of motor bike also is being on the increase, the stub area emphasis of motor bike has been transferred to vast mountain area and rural area, and these regional road majorities are non-paving road, exist that the intermountain road is rugged and rough, the rugged comparatively abominable road conditions of country road, thereby require motor cycle engine that higher ground clearance will be arranged, ensure the good performance of passing through, can satisfy the use of various abominable road conditions.

While is for the motor bike of mountain area and rural area use, the user also requires driving engine that high, the fuel-efficient key property of middle low speed torque output will be arranged, in order to satisfy this requirement, need to lengthen the length of air system pipeline, also to reduce simultaneously the bending of admission line, reduce the circulating resistance of charge air flow in pipeline.In order to satisfy the above-mentioned arrangement requirement of air system pipeline, must move down driving engine integral body with respect to vehicle frame, guarantee that air system has enough arrangement space, will cause like this terrain clearance of driving engine to reduce, the crossing ability of vehicle reduces, and can not well satisfy the crossing ability requirement in mountain area and rural area.

Conventional engines cylinder block inner cylinder liner line of centers is by engine housing machining crankshaft bearing borehole center, and there is obvious contradiction in 2 kinds of above-mentioned layout demands to conventional engines, are difficult to guarantee simultaneously.

The utility model content

In order to overcome the deficiencies in the prior art, the utility model provides a kind of motor cycle engine, and it has increased the ground clearance of driving engine when satisfying engine aspirating system enough arrangement space are arranged, improved the crossing ability of vehicle at non-paving road.

The technical scheme that its technical matters that solves the utility model adopts is:

A kind of motor cycle engine, it comprises the engine housing that is arranged on the skew girder of vehicle frame lower position, the front end of engine housing up tilted configuration has cylinder block, the front end of cylinder block is provided with cylinder head, form the air system arrangement space between cylinder block and cylinder head and the skew girder of vehicle frame, the relative position of described cylinder block, cylinder head and skew girder of vehicle frame is constant, cylinder block inner cylinder liner line of centers angle of inclination with respect to the horizontal plane is constant, engine housing moves on the whole, and namely the machining crankshaft bearing borehole center of engine housing upwards biases to cylinder block inner cylinder liner line of centers top.

As improvement of the technical scheme, setover vertically upward with respect to cylinder block inner cylinder liner line of centers in the machining crankshaft bearing borehole center of described engine housing.

The beneficial effects of the utility model are: the utility model passes through at cylinder block, the relative position of cylinder head and skew girder of vehicle frame is constant, in the constant situation in cylinder block inner cylinder liner line of centers angle of inclination with respect to the horizontal plane, engine housing is moved on the whole, the machining crankshaft bearing borehole center that is engine housing upwards biases to cylinder block inner cylinder liner line of centers top, so that cylinder block, formed air system arrangement space is constant between cylinder head and the skew girder of vehicle frame, when satisfying admission line system layout demand, the ground clearance of engine housing has been improved, this has well solved the contradiction between the air system arrangement space and driving engine terrain clearance in the prior art, so that driving engine is at output torque, find balance between oil consumption and the trafficability, be well positioned to meet vehicle at the various performance requriementss of the non-paving roads such as mountain area.

Description of drawings

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

Fig. 1 is the assembling schematic diagram of the utility model on the motor bike complete machine;

Fig. 2 is structural representation of the present utility model.

The specific embodiment

With reference to Fig. 1 ~ Fig. 2, a kind of motor cycle engine of the present utility model, it comprises the engine housing 1 that is arranged on skew girder of vehicle frame 4 lower positions, be provided with crank assemblby 12 in the engine housing 1, bent axle in the crank assemblby 12 connects with piston 5 by connecting rod 13, the front end of engine housing 1 up tilted configuration has cylinder block 2, front end refers to the travel direction of vehicle, piston 5 is held in the inner cylinder liner of cylinder block 2, the front end of cylinder block 2 is provided with cylinder head 3, form the air system arrangement space between cylinder block 2 and cylinder head 3 and the skew girder of vehicle frame 4, be roughly such as oval dotted line A institute region among Fig. 1, the upper end of cylinder head 3 is provided with air inlet pipe joint 31, air inlet pipe joint 31 is connected with carburettor 6 and air filter 7 in turn by the pipeline connection, by air filter 7, carburettor 6 to air inlet pipe joint 31 formed intake channels are admission line, intake channel is shown in curve B among Fig. 1, described cylinder block 2, the relative position of cylinder head 3 and skew girder of vehicle frame 4 is constant, cylinder block 2 inner cylinder liner line of centers C angles of inclination with respect to the horizontal plane are constant, its angle of inclination represents with θ, tiltangleθ is generally got 10 °, so that cylinder block 2, formed air system arrangement space is constant between cylinder head 3 and the skew girder of vehicle frame 4, satisfy admission line system layout demand, engine housing 1 is moved on the whole, machining crankshaft bearing borehole 11 centers that are about to engine housing 1 upwards bias to cylinder block 2 inner cylinder liner line of centerss top, this has improved the ground clearance S of engine housing 1, well solved the contradiction between the air system arrangement space and driving engine terrain clearance in the prior art, so that driving engine is at output torque, find balance between oil consumption and the trafficability, be well positioned to meet vehicle at the various performance requriementss of the non-paving roads such as mountain area.

Machining crankshaft bearing borehole 11 centers of engine housing 1 can bias to cylinder block 2 inner cylinder liner line of centerss top straight up, for reducing as far as possible the improvement to existing cylinder block 2 and engine housing 1, setover vertically upward with respect to cylinder block 2 inner cylinder liner line of centers C in machining crankshaft bearing borehole 11 centers of preferred described engine housing 1, arrow D indication among vertical off setting direction such as Fig. 2, so that when existing cylinder block 2 and engine housing 1 are reequiped to satisfy the vertical off setting requirement, only need a refiting engine casing 1 to get final product.

The above be better embodiment of the present utility model, but the utility model is not limited to above-described embodiment, as long as it reaches technique effect of the present utility model with any same or similar means, all should fall within the protection domain of the present utility model.

Claims

1. motor cycle engine, comprise the engine housing (1) that is arranged on the skew girder of vehicle frame lower position, the front end of engine housing (1) up tilted configuration has cylinder block (2), the front end of cylinder block (2) is provided with cylinder head (3), form the air system arrangement space between cylinder block (2) and cylinder head (3) and the skew girder of vehicle frame, it is characterized in that: described cylinder block (2), the relative position of cylinder head (3) and skew girder of vehicle frame is constant, cylinder block (2) inner cylinder liner line of centers angle of inclination with respect to the horizontal plane is constant, and machining crankshaft bearing borehole (11) center of engine housing (1) upwards biases to cylinder block (2) inner cylinder liner line of centers top.

2. a kind of motor cycle engine according to claim 1, it is characterized in that: setover vertically upward with respect to cylinder block (2) inner cylinder liner line of centers in machining crankshaft bearing borehole (11) center of described engine housing (1).