阅读说明：本技术 曲轴箱通风系统及其加热方法 (Crankcase ventilation system and heating method thereof ) 是由 杨鑫 于 2018-05-29 设计创作，主要内容包括：本申请涉及一种曲轴箱通风系统及其加热方法,通风系统包括曲轴箱通风管,所述曲轴箱通风管的两端分别连接发动机和发动机进气管道；所述曲轴箱通风管的至少一侧设有压力检测装置和加热装置,所述压力检测装置的输出端接入汽车车载诊断系统的输入端,所述加热装置的触发端接入汽车车载诊断系统的输出端。本申请通过检测曲轴箱通风管内的压力,根据压力值控制加热装置的启动和停止,直接将温度与结冰的关系进行准确的对应,确保加热装置在结冰时启动,不结冰时不启动,结构简单,工作可靠,能够减少电量消耗。(the application relates to a crankcase ventilation system and a heating method thereof, wherein the ventilation system comprises a crankcase ventilation pipe, and two ends of the crankcase ventilation pipe are respectively connected with an engine and an engine air inlet pipeline; at least one side of the crankcase ventilation pipe is provided with a pressure detection device and a heating device, the output end of the pressure detection device is connected to the input end of the vehicle-mounted diagnosis system of the vehicle, and the trigger end of the heating device is connected to the output end of the vehicle-mounted diagnosis system of the vehicle. This application is through detecting the pressure in the crankcase ventilation pipe, according to pressure value control heating device's start-up and stop, directly carries out accurate correspondence with the relation of temperature and freezing, ensures that heating device starts when freezing, does not start when not freezing, simple structure, and reliable operation can reduce the electric quantity consumption.)

1. A crankcase ventilation system, comprising:

The two ends of the crankcase ventilation pipe are respectively connected with the engine and an engine air inlet pipeline;

At least one side of the crankcase ventilation pipe is provided with a pressure detection device and a heating device, the output end of the pressure detection device is connected to the input end of the vehicle-mounted diagnosis system of the automobile, and the trigger end of the heating device is connected to the output end of the vehicle-mounted diagnosis system of the automobile.

2. The crankcase ventilation system of claim 1, further comprising an engine-side connector and an intake-pipe-side connector, wherein one end of the crankcase ventilation pipe is connected to the engine through the engine-side connector, and the other end of the crankcase ventilation pipe is connected to the engine intake pipe through the intake-pipe-side connector.

3. The crankcase ventilation system of claim 2, wherein the engine-side fitting and the intake-side fitting are quick-connect fittings.

4. the crankcase ventilation system according to claim 2, wherein the pressure detection device, the heating device, and the engine-side connector are integrated, and/or the pressure detection device, the heating device, and the intake pipe-side connector are integrated.

5. the crankcase ventilation system of claim 4, wherein the pressure detection device and the heating device are disposed on a side of the engine-side connector that is adjacent to the crankcase ventilation tube.

6. The crankcase ventilation system according to claim 4, wherein the pressure detection means and the heating means are provided on a side of the intake pipe-side joint close to the crankcase ventilation pipe.

7. The crankcase ventilation system of claim 1, wherein the pressure detection device comprises a pressure sensor, an output of the pressure sensor being coupled to an input of the automotive on-board diagnostic system.

8. the crankcase ventilation system of claim 1, wherein the heating device comprises a thermistor, and an activation terminal of the thermistor is coupled to an output terminal of the vehicle onboard diagnostic system.

9. a method of heating a crankcase ventilation system according to any of claims 1-8 comprising:

s1: detecting the pressure in a crankcase ventilation pipe in real time by adopting a pressure detection device;

S2: and when the pressure in the crankcase ventilation pipe is detected to exceed a set range, triggering the heating device to work.

10. The heating method of a crankcase ventilation system according to claim 9, wherein said step S2 includes:

Transmitting the pressure acquired by the detection device to an automobile-mounted diagnosis system;

The vehicle-mounted diagnosis system judges whether the pressure exceeds the set range;

And if the pressure exceeds the set range, the vehicle-mounted diagnosis system sends a trigger signal to the heating device to trigger the heating device to work.

Technical Field

The application relates to the technical field of engines, in particular to a crankcase ventilation system and a heating method thereof.

Background

Conventional crankcase ventilation ducts are typically connected between the engine and the engine intake manifold by a clamp. Under cold environment, the crankcase ventilation pipe interface can freeze, leads to the crankcase ventilation pipe to block up, and along with engine operation, the internal pressure of crankcase climbs, leads to engine faults such as crankcase oil blanket department oil impregnate, heat up machine oil, intake pipe intake. Therefore, the icing problem of the crankcase ventilation pipe needs to be solved when the system is designed.

Disclosure of Invention

The application provides a crankcase ventilation system and a heating method thereof, which aim to solve the problem that a crankcase ventilation pipe is blocked due to icing in a cold environment.

a first aspect of the present application provides a crankcase ventilation system, comprising:

The two ends of the crankcase ventilation pipe are respectively connected with the engine and an engine air inlet pipeline;

at least one side of the crankcase ventilation pipe is provided with a pressure detection device and a heating device, the output end of the pressure detection device is connected to the input end of the vehicle-mounted diagnosis system of the vehicle, and the trigger end of the heating device is connected to the output end of the vehicle-mounted diagnosis system of the vehicle.

optionally, this application still includes engine side joint and intake pipe side joint, the engine is passed through to the one end of crankcase ventilation pipe, and the other end passes through intake pipe side joint and connects the engine air intake pipe.

Optionally, the engine-side joint and the intake pipe-side joint are quick-connect joints.

Alternatively, the pressure detection device, the heating device, and the engine-side joint are integrated together, and/or the pressure detection device, the heating device, and the intake pipe-side joint are integrated together.

Alternatively, the pressure detection means and the heating means are provided on the engine-side joint on a side close to the crankcase ventilation duct.

Alternatively, the pressure detection means and the heating means are provided on the intake pipe side joint on a side close to the crankcase ventilation pipe.

Optionally, the pressure detection device includes a pressure sensor, and an output end of the pressure sensor is connected to an input end of the vehicle-mounted diagnosis system.

Optionally, the heating device includes a thermistor, and a trigger end of the thermistor is connected to an output end of the vehicle-mounted diagnosis system.

A second aspect of the present application provides a method of heating a crankcase ventilation system according to any of the above, comprising:

s1: detecting the pressure in a crankcase ventilation pipe in real time by using a detection device;

s2: and when the pressure in the crankcase ventilation pipe is detected to exceed a set range, triggering the heating device to work.

optionally, the step S2 includes:

Transmitting the pressure acquired by the detection device to an automobile-mounted diagnosis system;

The vehicle-mounted diagnosis system judges whether the pressure exceeds the set range;

And if the pressure exceeds the set range, the vehicle-mounted diagnosis system sends a trigger signal to the thermistor so as to trigger the heating device to work.

The technical scheme provided by the application can achieve the following beneficial effects:

The application provides a crankcase ventilation system, through detecting the pressure in the crankcase ventilation pipe, according to pressure value control heating device's start-up and stop, directly carry out accurate correspondence with the temperature with the relation that freezes to ensure that heating device starts when freezing, do not start when not freezing, simple structure, reliable operation can reduce the electric quantity consumption.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

FIG. 1 is a schematic view of a crankcase ventilation system provided by an embodiment of the present application.

reference numerals:

1-crankcase ventilation duct;

11-engine side joint;

111-pressure detection means;

12-inlet pipe side joint;

2-an engine;

And 3, an engine air inlet pipeline.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Detailed Description

The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.

As shown in fig. 1, the present invention provides a crankcase ventilation system, including a crankcase ventilation pipe 1, where two ends of the crankcase ventilation pipe 1 are respectively connected to an engine 2 and an engine intake duct 3, at least one side of the crankcase ventilation pipe 1 is provided with a pressure detection device 111 and a heating device (not shown in the figures), an output end of the pressure detection device 111 is connected to an input end of an on-board vehicle diagnosis system (i.e. OBD), an activation end of the heating device is connected to an output end of the on-board vehicle diagnosis system, the pressure detection device 111 is used for detecting a pressure in the crankcase ventilation pipe 1 in real time and transmitting the detected pressure to the on-board vehicle diagnosis system, the on-board vehicle diagnosis system determines whether the pressure exceeds a set value or a set range, when the pressure exceeds the set value or the set range, the on-board vehicle diagnosis system sends an activation, the relationship between the temperature and the icing is accurately corresponded, and the heating device is ensured to be started when the icing is carried out and not to be started when the icing is not carried out.

specifically, the pressure detection device 111 may be disposed on a side of the crankcase ventilation pipe 1 close to the engine 2, or may be disposed on a side of the crankcase ventilation pipe 1 close to the engine intake duct 3, so as to detect the pressure in the crankcase ventilation pipe 1.

preferably, the pressure detection device 111 may be disposed on both the side of the crankcase ventilation pipe 1 close to the engine 2 and the side of the crankcase ventilation pipe 1 close to the engine intake pipe 3, so as to increase the reliability of pressure detection and prevent inaccurate pressure detection values caused by a failure of the pressure detection device 111 itself or other reasons.

Similarly, the heating device can be arranged on one side of the crankcase ventilation pipe 1 close to the engine 2, and also can be arranged on one side of the crankcase ventilation pipe 1 close to the engine air inlet pipeline 3, so that the heating of the crankcase ventilation pipe 1 is realized, and the blockage of the crankcase ventilation pipe 1 caused by icing is eliminated.

Preferably, the heating device can be arranged on one side of the crankcase ventilation pipe 1 close to the engine 2 and one side of the crankcase ventilation pipe 1 close to the engine air inlet pipeline 3 at the same time, so that the two ends of the crankcase ventilation pipe 1 are heated at the same time, the speed of eliminating ice is increased, and the normal work of the crankcase ventilation pipe 1 is ensured.

Further, crankcase ventilation system can also include engine side joint 11 and intake pipe side joint 12, and engine 2 is connected through engine side joint 11 to the one end of crankcase ventilation pipe 1 (the one end that is close to engine 2), and engine air intake pipe 3 is connected through intake pipe side joint 12 to the other end of crankcase ventilation pipe 1 (the one end that is close to engine air intake pipe 3), compares the clamp connection that adopts among the prior art, and the joint that this application adopted can effectively improve the reliability of connecting.

specifically, the engine side connector 11 and the intake pipe side connector 12 can be both quick connectors, which are plug-and-play, and can conveniently and simply realize the connection of the crankcase ventilation pipe 1 with the engine 2 and the engine intake pipe 3, and the connection in this way is reliable, so that the connection position can not be disconnected when the pressure in the crankcase ventilation pipe 1 is increased.

further, the pressure detecting device 111 and the heating device may be integrally provided in the engine-side joint 11, i.e., the pressure detecting device 111, the heating device, and the engine-side joint 11 are integrated together.

further, the pressure detecting device 111 and the heating device may also be integrally provided in the intake pipe-side joint 12, that is, the pressure detecting device 111, the heating device, and the intake pipe-side joint 12 are integrated together.

Obviously, it is also possible to integrate the pressure detection device 111, the heating device, and the engine-side joint 11, and to integrate the pressure detection device 111, the heating device, and the intake pipe-side joint 12, respectively, at the same time.

The pressure detection device 111, the heating device and the engine side connector 11 are integrally arranged, or the pressure detection device 111, the heating device and the air inlet pipe side connector 12 are integrally arranged, so that the system structure is simplified, the assembly process is simplified, and the working reliability of the crankcase ventilation pipe 1 is improved.

Further, the pressure sensing end of the pressure detecting device 111 is located in the inner cavity of the crankcase ventilation pipe 1 and located inside the icing position (i.e. on the side away from the end of the crankcase ventilation pipe 1) to ensure that the pressure detecting device 111 can work normally when the end of the crankcase ventilation pipe 1 is iced, and the pressure detecting device 111 detects the pressure in the crankcase ventilation pipe 1. Similarly, heating device sets up in the inner chamber of crankcase ventilation pipe 1, and is located the position inboard that freezes (the one side of keeping away from the tip of crankcase ventilation pipe 1 promptly) to when guaranteeing that the tip of crankcase ventilation pipe 1 freezes, the heat that heating device produced for the heating of crankcase ventilation pipe 1 inside reduces the heat and to the giving off of surrounding environment, improves thermal utilization ratio.

Specifically, when the engine-side joint 11 is provided and the pressure detection device 111 and the heating device are provided on the side of the crankcase ventilation duct 1 close to the engine 2, the pressure detection device 111 and the heating device may be provided on the side of the engine-side joint 11 close to the crankcase ventilation duct 1.

specifically, when the intake pipe side joint 12 is provided and the crankcase ventilation duct 1 is provided with the pressure detection device 111 and the heating device on the side close to the engine intake duct 3, the pressure detection device 111 and the heating device may be provided on the intake pipe side joint 12 on the side close to the crankcase ventilation duct.

further, the pressure detection device 111 comprises a pressure sensor, the influence of other factors can be effectively eliminated, the pressure value in the crankcase ventilation pipe 1 can be accurately and timely detected, the output end of the pressure sensor is connected to the input end of the vehicle-mounted diagnosis system, and the icing condition of the crankcase ventilation pipe 1 is judged in real time through the vehicle-mounted diagnosis system.

Furthermore, the heating device comprises a thermistor, the trigger end of the thermistor is connected to the output end of the vehicle-mounted diagnosis system of the automobile, and the vehicle-mounted diagnosis system of the automobile triggers the thermistor to work according to the icing condition of the crankcase ventilation pipe 1. Adopt thermistor, the structure is fairly simple, and can be according to the size of the temperature change resistance in the crankcase ventilation pipe 1 to adopt different heating power to heat, improve thermal utilization ratio.

the application also provides a heating method of the crankcase ventilation system, which comprises the following steps:

S1: the pressure in the crankcase ventilation pipe 1 is detected in real time by using a pressure detection device 111, and the detection device can adopt any device capable of directly or indirectly detecting the pressure in the crankcase ventilation pipe 1, such as an elastic deformation amount generated by the crankcase ventilation pipe 1 and other parts under the pressure condition, the magnitude of a pressure value can be indirectly detected, and a pressure sensor capable of directly detecting the pressure in the crankcase ventilation pipe 1 can also be adopted;

s2: when it is detected that the pressure in the crankcase ventilation duct 1 exceeds a set range, the heating device is triggered to operate, for example, a control device may be provided, which sets a pressure value or a pressure range, compares the detected pressure value with the set pressure value or the pressure range by the control device, and triggers the heating device to operate when the detected pressure value is too large (exceeds the set pressure value or the pressure range).

Specifically, the control device may adopt an on-board vehicle diagnosis system, and the step S2 includes:

Transmitting the pressure acquired by the pressure detection device 111 to an automobile-mounted diagnosis system;

The vehicle-mounted diagnosis system judges whether the pressure exceeds a set range;

If the pressure exceeds the set range, the vehicle-mounted diagnosis system sends a trigger signal to the heating device to trigger the heating device to work.

In particular, the heating means may comprise a thermistor.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.