阅读说明：本技术 一种dvvt循环油路系统及汽油发动机 (DVVT circulating oil way system and gasoline engine ) 是由 张继杨 靳晓妍 吴斌峰 潘理杰 章帅韬 于 2019-10-11 设计创作，主要内容包括：本发明公开了一种DVVT循环油路系统及汽油发动机,其包括气缸盖和凸轮轴盖,所述气缸盖设置有主供油道,所述主供油道沿所述气缸盖的中轴线布置,所述凸轮轴盖上设置有两个VVT电磁阀分配油道和两个提前及迟后油道,两个VVT电磁阀分配油道均与主供油道连通且相对主供油道对称布置,每个VVT电磁阀分配油道连通一个提前及迟后油道。本发明其不仅可以实现VVT电磁阀的精确控制,而且极大简化了气缸盖前端的布置设计及加工难度,满足日趋紧凑的气缸盖布置要求。(The invention discloses a DVVT circulating oil way system and a gasoline engine, which comprise a cylinder cover and a camshaft cover, wherein the cylinder cover is provided with a main oil supply channel, the main oil supply channel is arranged along the central axis of the cylinder cover, the camshaft cover is provided with two VVT solenoid valve distribution oil channels and two advance and retard oil channels, the two VVT solenoid valve distribution oil channels are both communicated with the main oil supply channel and are symmetrically arranged relative to the main oil supply channel, and each VVT solenoid valve distribution oil channel is communicated with one advance and retard oil channel. The invention not only can realize the accurate control of the VVT electromagnetic valve, but also greatly simplifies the arrangement design and the processing difficulty of the front end of the cylinder cover and meets the increasingly compact arrangement requirement of the cylinder cover.)

1. The DVVT circulating oil way system comprises a cylinder cover and a camshaft cover, and is characterized in that: the cylinder cover is provided with a main oil supply passage, the main oil supply passage is arranged along the central axis of the cylinder cover, the camshaft cover is provided with two VVT solenoid valve distribution oil passages and two advance and retard oil passages, the two VVT solenoid valve distribution oil passages are communicated with the main oil supply passage and are symmetrically arranged relative to the main oil supply passage, and each VVT solenoid valve distribution oil passage is communicated with one advance and retard oil passage.

2. The DVVT circulating oil system of claim 1, wherein: the VVT solenoid valve distribution oil passage comprises a VVT solenoid valve mounting hole and a gas distribution timing advance and retard distribution oil passage, the VVT solenoid valve mounting hole is communicated with the main oil supply passage, one end of the gas distribution timing advance and retard distribution oil passage is communicated with the VVT solenoid valve mounting hole, and the other end of the gas distribution timing advance and retard distribution oil passage is communicated with the advance and retard oil passage.

3. The DVVT oil recirculation system of claim 2, wherein: the VVT electromagnetic valve mounting hole and the distribution oil passage of the advancing and the retarding of the gas distribution timing are formed by adopting a die casting and drilling process.

4. The DVVT circulating oil system of claim 1, wherein: the centerline of the cylinder head is collinear with the centerline of the camshaft cover.

5. A gasoline engine, characterized in that: the DVVT circulating oil way system of the gasoline engine is used in the DVVT circulating oil way system of any one of claims 1 to 4.

Technical Field

The invention relates to a DVVT circulating oil way system, belongs to the technical field of gasoline engines, and particularly relates to a DVVT circulating oil way system and an amphibious vehicle with the DVVT circulating oil way system.

Background

Vvt (variable valve timing) is a variable valve timing technology, and its operating principle is: the VVT actuator comprises a stator and a rotor, wherein the stator of the VVT actuator is connected with a crankshaft through a timing chain, the rotor is fixed on a camshaft through a bolt, and a VVT system pushes the rotor and the stator in the VVT actuator to rotate relatively through the pressure of engine oil, so that the phase change between the camshaft and the crankshaft is realized. The VVT improves the efficiency and the power of the engine under different rotating speeds of the engine by adjusting the opening and closing time of the intake valve and the exhaust valve. Most of the existing engines are only provided with an air inlet VVT, but the DVVT technology can simultaneously realize the advance or delay of the opening angle of an air inlet valve and an exhaust valve to adjust the air inlet and exhaust amount in real time and change the size of a valve overlap angle, so that the air inlet charging amount and the efficiency are increased, the air inlet vortex is better, the maximum cylinder explosion pressure and the participating exhaust amount are adjusted, and finally the improvement of the comprehensive performances of the engine, such as the dynamic property, the economical efficiency and the like, is improved.

Most of the existing engine VVT systems are arranged on a cylinder head (such as chinese patents CN203347868 and CN207554206), especially for the DVVT system, the arrangement and machining design of the front end of the cylinder head are very difficult, and the assembly and sealing problems are easy to occur, and meanwhile, because the main oil gallery is located on the air intake side, the oil pressure establishment and response speed on the exhaust side are slower than those on the exhaust side, which is not favorable for the precise control of VVT; or the whole DVVT system is completely arranged on the cylinder cover, and the picture shows that the arrangement of the front end of the cylinder cover is very compact, the processing difficulty is high, and the small wall thickness at each position has reliability risk. Limited by the arrangement space, the intake and exhaust VVT battery valves or the inability to be arranged symmetrically along the transverse centerline of the cylinder head will affect the consistency of the response speed of the intake and exhaust VVT.

Disclosure of Invention

One object of the present invention is to provide a DVVT circulation oil circuit system and a gasoline engine, which not only can realize the precise control of the VVT solenoid valve, but also greatly simplify the layout design and processing difficulty of the front end of the cylinder head, and meet the increasingly compact cylinder head layout requirement.

In order to solve the technical problem, the DVVT circulating oil way system of the gasoline engine comprises a cylinder cover and a camshaft cover, wherein the cylinder cover is provided with a main oil supply channel, the main oil supply channel is arranged along the central axis of the cylinder cover, the camshaft cover is provided with two VVT solenoid valve distribution oil channels and two advance and retard oil channels, the two VVT solenoid valve distribution oil channels are communicated with the main oil supply channel and are symmetrically arranged relative to the main oil supply channel, and each VVT solenoid valve distribution oil channel is communicated with one advance and retard oil channel.

In a preferred embodiment of the present invention, the VVT solenoid valve distribution oil passage includes a VVT solenoid valve mounting hole that communicates with the main oil supply passage, and a valve timing advance and retard distribution oil passage having one end that communicates with the VVT solenoid valve mounting hole and the other end that communicates with the advance and retard oil passages.

In a preferred embodiment of the present invention, the VVT solenoid valve mounting hole and the valve timing advancing and retarding distribution oil passages are formed by die casting and drilling.

In a preferred embodiment of the invention, the centerline of the cylinder head is collinear with the centerline of the camshaft cover.

The invention also discloses a gasoline engine which uses the DVVT circulating oil way system of the gasoline engine.

The invention has the beneficial effects that: the cylinder cover is provided with the main oil supply channel, the main oil supply channel is arranged along the central axis of the cylinder cover, and the VVT solenoid valve distribution oil channel and the advance and retard oil channels are arranged on the cam shaft cover, so that the arrangement design and the processing difficulty of the front end of the cylinder cover are greatly simplified, and the increasingly compact cylinder cover arrangement requirement is met. The distribution oil way adopts a processing technology combining die casting and drilling, so that the arrangement structure of the camshaft cover is compact; furthermore, the intake and exhaust VVT electromagnetic valves are symmetrically arranged along the transverse center line of the camshaft cover, so that the consistency of the response speed of the intake and exhaust VVT electromagnetic valves is ensured; VVT battery valve is vertical to be installed on the camshaft cover, and engine oil is directly let out to cylinder head oil intracavity from battery valve tail end, compares in VVT battery valve side-mounted and arranges that the draining way is more unobstructed, is difficult for blockking up.

Drawings

FIG. 1 is a schematic diagram of a DVVT recirculating oil circuit system of the present invention;

FIG. 2 is a schematic oil supply diagram of a DVVT recirculating oil circuit system of the present invention;

FIG. 3 is a schematic oil drainage diagram of a DVVT circulating oil path system of the present invention;

FIG. 4 is a schematic diagram of the structure of the oil distribution passage in the camshaft cover of the gasoline engine of the present invention;

FIG. 5 is a layout view of a camshaft cover of a gasoline engine of the present invention;

FIG. 6 is a schematic illustration of a gasoline engine of the present invention;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention discloses a DVVT circulating oil way system which comprises a cylinder cover and a camshaft cover, wherein the cylinder cover is provided with a main oil supply channel, the main oil supply channel is arranged along the central axis of the cylinder cover, the camshaft cover is provided with two VVT solenoid valve distribution oil channels and two advance and retard oil channels, the two VVT solenoid valve distribution oil channels are both communicated with the main oil supply channel and are symmetrically arranged relative to the main oil supply channel, and each VVT solenoid valve distribution oil channel is communicated with one advance and retard oil channel. The VVT solenoid valve distribution oil passage comprises a VVT solenoid valve mounting hole and a gas distribution timing advance and retard distribution oil passage, the VVT solenoid valve mounting hole is communicated with the main oil supply passage, one end of the gas distribution timing advance and retard distribution oil passage is communicated with the VVT solenoid valve mounting hole, and the other end of the gas distribution timing advance and retard distribution oil passage is communicated with the advance and retard oil passage. The VVT electromagnetic valve mounting hole and the distribution oil passage of the timing advance and the timing retard of the gas distribution are formed by adopting a die casting and drilling process. The centerline of the cylinder head is collinear with the centerline of the camshaft cover.

Specifically, as shown in fig. 1, the present invention specifically relates to a DVVT circulation oil circuit system of a gasoline engine; this DVVT circulation oil piping system includes: 1. a main oil supply passage 1 disposed on the cylinder head; 2. a VVT solenoid valve distribution oil passage 2 in the camshaft cover; 3. the timing advance and retard oil passages 3-1, 3-2 and 4-1, 4-2 of the air distribution in the camshaft and the VVT executor.

As shown in fig. 2 and 3, when the engine operates under a variable working condition, engine oil in a main oil passage enters a VVT electromagnetic valve distribution oil passage 2 in a camshaft cover through a main oil supply passage 1 on a cylinder cover, the VVT electromagnetic valve realizes the opening and closing of an air distribution timing advance or retard oil passage according to the instruction of an ECU, and an air inlet side enters the air distribution timing advance or retard oil passages 3-1 and 4-1 in an air inlet camshaft and a VVT actuator respectively through a VVT electromagnetic valve mounting hole 2-1, an air distribution timing advance distribution oil passage 2-5 or a retard distribution oil passage 2-6; the exhaust side passes through a VVT solenoid valve mounting hole 2-2, a gas distribution timing advance distribution oil passage 2-3 or a gas distribution timing retard distribution oil passage 2-4 and respectively enters a gas distribution timing advance or retard oil passage 3-2 and a gas distribution timing retard or retard oil passage 4-2 in an exhaust camshaft and a VVT actuator. The standby oil is filled in the air distribution timing advance chamber or the air distribution timing retard chamber to push the rotor of the air inlet side VVT actuator to rotate so as to realize continuous variable phase between the camshaft and the crankshaft; when the engine switches working conditions, a rotor of the VVT actuator discharges engine oil in an advance chamber or a retard chamber of the air distribution timing according to an instruction of the ECU, returns values 2-1 and 2-2 in the VVT electromagnetic valve along timing advance oil passages 3-1 and 4-1 or retard oil passages 3-2 and 4-2, and discharges the engine oil through an oil drainage hole at the tail end of the VVT electromagnetic valve, and finally the engine oil is circulated in an oil cavity of a cylinder cover. As shown in fig. 4, the VVT solenoid valve distribution oil passages 2-5, 2-6 and the VVT solenoid valve mounting hole 2-1 are arranged on the camshaft cover 2, so that the arrangement design and the processing difficulty of the front end of the cylinder cover are greatly simplified, and the increasingly compact cylinder cover arrangement requirement is met; the oil distribution passages 2-1, 2-2, 2-3, 2-4, 2-5 and 2-6 adopt a processing technology of combining die casting and drilling, so that the arrangement structure of the camshaft cover 2 is compact. As shown in fig. 5 and 6, the intake and exhaust VVT solenoid valves 3-1 and 3-2 are symmetrically arranged along the centerline of the camshaft cover 2, ensuring the consistency of the response speeds of the intake and exhaust VVT. VVT solenoid valves 3-1 and 3-2 are vertically installed on the camshaft cover 2, and engine oil is directly drained into the cavity of the cylinder cover oil 2 from the tail end of the battery valve.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.