A lightweight engine system architecture with a coupled post-processing device

Abstract

The present invention discloses a lightweight engine system architecture with a coupled post-treatment device, which includes a cylinder block and a cylinder head assembly. A sprocket chamber is provided on the side surfaces of the cylinder block and the cylinder head assembly. An oil pan is provided at the bottom of the cylinder block reinforcement plate. An oil cooler and filter component is provided in the middle of the intake side of the cylinder block. A flywheel plate is provided at the rear end of the cylinder block, and a starter is installed on the flywheel plate. An intake pipe is provided on the right side surface of the cylinder head assembly, and an EGR valve and a cooler component are installed on the intake pipe. This system architecture has the advantages of saving space on the vehicle frame while ensuring the overall stability, achieving the purpose of reducing noise; the cylinder block reinforcement plate seals the crankcase and sprocket chamber of the cylinder block, etc.

Description

Technical Field

[0001] The present invention belongs to the technical field of engines, and particularly relates to a light engine system architecture coupled with a post-treatment device.

Background Art

[0002] Pickup trucks are an important part of the automotive market. With the upgrade of the National VI emissions standards, the development of new technologies, and the increasing demand of customers for new functions, the engine accessories are also increasing continuously. However, due to the limited space of the vehicle frame structure and engine compartment layout of the whole vehicle.

[0003] For conventional light-duty diesel engines meeting the National VI emissions standards, the generally adopted emission technology routes are as follows: A: adopting high and low pressure EGR, and the post-treatment system adopts DOC + SCRF + SCR + ASC; B: adopting high pressure EGR, and the post-treatment system adopts DOC + SCR + ASC + DPF. When installing the post-treatment system unit in the whole vehicle layout, the overall encapsulation is usually adopted, that is, the primary encapsulation, which is installed on the vehicle chassis. The connecting pipe after the turbine of the supercharger is mainly connected to the post-treatment through the connecting pipe, or the DOC is coupled and installed on the engine, and the rest of the catalytic converters are arranged on the vehicle chassis after overall encapsulation. These two post-treatment encapsulation vehicle layouts often require sufficient frame space. The pickup truck is positioned as a light vehicle. For the increasing accessories, it is necessary to optimize the layout of the engine from the system architecture, and at the same time, it is necessary to meet the needs of the newly added accessories of the customers within the limited space of the whole vehicle engine compartment.

[0004] At the same time, when optimizing and upgrading the engine system structure, it is also necessary to consider whether the indicators such as the stability, noise fluctuation, and maintenance convenience after optimization can basically meet the requirements of the existing technology level. Therefore, the present application proposes a light engine system architecture for pickup trucks coupled with a post-treatment device, and provides an engine system architecture with a more reasonable, more compact, more adaptable, and more advanced structure layout to meet the new needs of customers.

Summary of the Invention

[0005] The purpose of the present invention is to provide a light engine system architecture coupled with a post-treatment device, so as to solve the problems existing in the engine layout of the existing pickup trucks, such as limited structure, which is not conducive to the installation of accessories, the installation and layout of the overall accessories of the engine are not compact enough, and there is less sufficient frame space left for the pickup truck.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A lightweight engine system architecture with a coupled post-treatment device, comprising a cylinder block and a cylinder head assembly. The cylinder head assembly is provided at the top of the cylinder block. A reinforcing plate is provided at the bottom of the cylinder block. A sprocket chamber is provided on the side surfaces of the cylinder block and the cylinder head assembly. An oil pan is provided at the bottom of the reinforcing plate of the cylinder block. An oil cooler and filter component is provided in the middle of the intake side of the cylinder block. A flywheel plate is provided at the rear end of the cylinder block, and a starter is installed on the flywheel plate. An intake pipe is provided on the right side surface of the cylinder head assembly, and an EGR valve and a cooler component are installed on the intake pipe.

[0008] Further, a valve timing mechanism is provided in the sprocket chamber. A silent chain is sleeved on the valve timing mechanism. A fuel injection pump is provided on the sprocket chamber, and the silent chain is also connected to the driving end of the fuel injection pump.

[0009] Further, the oil cooler and filter component is arranged obliquely upward relative to the cylinder block.

[0010] Further, the EGR valve and cooler component is a high-pressure EGR valve and is arranged at a high position on the intake pipe.

[0011] Further, it further includes a post-treatment device. The post-treatment device includes a primary post-treatment unit. A supercharger is provided at the inlet of the primary post-treatment unit, and the supercharger is placed on the exhaust side of the cylinder block. A secondary post-treatment unit is provided at the outlet of the primary post-treatment unit, and a tertiary post-treatment unit is provided at the outlet of the secondary treatment unit.

[0012] Further, the primary post-treatment unit includes a diesel oxidation catalyst and a selective catalytic reduction catalyst. The secondary post-treatment unit includes a selective catalytic reduction catalyst and an ammonia slip catalyst. The tertiary post-treatment unit includes a diesel oxidation catalyst and a diesel particulate filter.

[0013] Further, it further includes a vacuum pump, and the vacuum pump is provided at the rear end of the cylinder head assembly.

[0014] Further, a double-layer gear train is provided on the side surface of the sprocket chamber. The double-layer gear train includes an inner gear train and an outer gear train. The inner gear train includes a crankshaft pulley, a water pump pulley, a generator pulley, and an air-conditioning compressor pulley. The outer gear train includes a crankshaft pulley and a steering pump pulley. Both the inner gear train and the outer gear train are driven by belts.

[0015] Further, an air-conditioning compressor pulley is provided on the right side of the crankshaft pulley, and a steering pump pulley is provided on the left side. An automatic tensioner is provided above the crankshaft pulley, a water pump pulley is provided at the upper left of the crankshaft pulley, a generator pulley is provided at the upper left of the water pump pulley, and a fixed tensioner is provided above and on the right side of the automatic tensioner respectively.

[0016] Furthermore, the inner side of the belt of the inner gear train is sequentially fitted with the grooves of the crankshaft pulley, the automatic tensioner pulley, the water pump pulley, the generator pulley, the two fixed tensioner pulleys, and the air conditioner compressor pulley; the inner side of the belt of the outer gear train is fitted with the grooves of the crankshaft pulley and the steering pump pulley.

[0017] The beneficial effects achieved by the present invention are as follows:

[0018] (1) The system framework of the present invention adjusts and optimizes the installation positions of different accessories on the engine, places the main accessories on the engine at the front end, saves the space on the vehicle frame while ensuring the overall stability, and at the same time uses a silent chain to drive the fuel injection pump and the gas distribution timing mechanism to achieve the purpose of reducing noise; the cylinder block reinforcement plate seals the crankcase and the sprocket chamber of the cylinder block, and at the same time extends forward and to the right, and a flange is ingeniously designed at the lower part to install the oil pan, and the limited space of the vehicle chassis is used to ensure that the oil quantity in the oil pan meets the long-cycle oil change requirements of customers.

[0019] (2) The post-treatment system unit DOC + SCR + ASC + DPF layout of the system framework of the present invention adopts a three-stage system framework. The first-stage unit encapsulates the front-stage DOC and the front-stage SCR, ensuring the minimum temperature drop of the front-stage post-processor and maintaining the ignition temperature at medium and low load speeds of the diesel engine, so that the post-treatment system can quickly and efficiently ignite and enter the high-efficiency range for operation. The second-stage and third-stage post-treatment units have relatively small encapsulation volumes and are separately encapsulated, which can be flexibly arranged and installed on the vehicle chassis, avoiding various operating mechanisms on the chassis and ensuring the ground clearance of the vehicle, thereby realizing the reasonable installation and efficient matching of the post-treatment system on the vehicle.

[0020] (3) The system framework of the present invention places the main accessories at the front end, and the oil cooler and filter components make good use of the middle space of the cylinder block. At the same time, the filter is set obliquely upward. When replacing and maintaining the filter element, the operation can be carried out by opening the engine hood, which is very convenient; the vacuum pump is placed at the upper rear part of the engine; the double-layer gear train on the cylinder block and the layout of each accessory are reasonable. For example, the air conditioner compressor is set at the avoidance position of the sprocket chamber, the cylinder block reinforcement plate, and the oil pan, making full use of the available space; the EGR valve is arranged at a high position on the intake pipe, which is beneficial to the connection of the steam removal pipeline on the vehicle.

Description of the Drawings

[0021] In the drawings:

[0022] Figure 1 is the front view of the present invention;

[0023] Figure 2 is the rear view of the present invention;

[0024] Figure 3 is Figure 6An enlarged view of the cylinder block;

[0025] Figure 4 is the left view of the present invention;

[0026] Figure 5 is the right view of the present invention;

[0027] Figure 6 is the top view of the present invention;

[0028] Figure 7 is the assembly schematic diagram of the top view of the present invention.

[0029] Reference numerals: 1, cylinder block; 2, cylinder head assembly; 3, intake pipe; 4, EGR valve and cooler assembly; 5, oil cooler and filter assembly; 6, flywheel plate; 7, flywheel and gear assembly; 8, starter; 9, oil pan; 10, cylinder block reinforcement plate; 11, air conditioner compressor; 12, crankshaft damper assembly; 13, sprocket chamber; 14, fuel injection pump; 15, primary aftertreatment unit; 16, supercharger; 17, exhaust pipe; 18, generator; 19, water pump; 20, steering pump; 21, tertiary aftertreatment unit; 22, secondary aftertreatment unit; 23, vacuum pump.

Detailed Description of the Invention

[0030] The following is a specific description in combination with specific embodiments.

[0031] The following further describes the present invention in detail in combination with the specific implementation manners. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of the present invention.

[0032] Such as Figure 1-7As shown, a light engine system architecture of a coupled post-processing device includes a cylinder block 1 and a cylinder head assembly 2 (including structures such as a cylinder head body and a camshaft). The right side of the cylinder head assembly 2 is the intake side, and the left side is the exhaust side. The cylinder head assembly 2 is provided at the top of the cylinder block 1, and a reinforcing plate 10 is provided at the bottom of the cylinder block 1. The cylinder block 1, the cylinder head assembly 2, and the cylinder block reinforcing plate 10 form the main architecture of the entire engine system. A sprocket chamber 13 is provided on the side surfaces of the cylinder block 1 and the cylinder head assembly 2 and is connected by a flange. A valve timing mechanism (also known as a valve timing system) is provided in the sprocket chamber 13, and a silent chain is sleeved on the valve timing mechanism. A fuel injection pump 14 is provided on the sprocket chamber 13, and the silent chain 13 is also connected to the drive end of the fuel injection pump 14 to achieve the purpose of low noise. The cylinder block reinforcing plate 10 seals the crankcase of the cylinder block 1 and the sprocket chamber 13 and extends forward and to the right at the same time. An oil pan 9 is provided at the bottom of the cylinder block reinforcing plate 10 to ensure that the oil volume of the oil pan 9 meets the customer's long-cycle oil change requirement by using the limited space of the vehicle chassis. An oil cooler and filter component 5 is provided in the middle of the intake side of the cylinder block 1. On the one hand, it cools and filters the engine oil, and on the other hand, it provides coolant for connecting the EGR valve and the cooler component 4. The oil cooler and filter component 5 cleverly utilizes the intermediate space. The oil cooler and filter component 4 is arranged obliquely upward relative to the cylinder block 1, and the filter is set obliquely upward. When replacing and maintaining the filter element, the engine hood can be opened for operation, which is very convenient. A flywheel plate 6 is provided at the rear end of the cylinder block 1, and a starter 8 is installed on the flywheel plate 6. The flywheel plate 6 is the installation interface of the vehicle transmission. An intake pipe 3 is provided at the intake side of the right side surface of the cylinder head assembly 2, and an EGR valve and cooler component 4 is installed on the intake pipe 3. The EGR valve and cooler component 4 is a high-pressure EGR valve and is arranged at a high position on the intake pipe 3, which is beneficial to the connection of the steam removal pipeline on the vehicle.

[0033] The system architecture also includes a post-treatment device. In view of the frame limitation of the pickup truck, the DOC+SCR+ASC+DPF arrangement of the post-treatment system unit adopts a three-stage system architecture. The post-treatment device includes a primary post-treatment unit 15. A supercharger 16 is tightly coupled at the inlet of the primary post-treatment unit 15. The supercharger 16 is placed on the exhaust side of the cylinder block 1, that is, the exhaust inlet of the primary post-treatment unit 15 is directly coupled to the exhaust outlet of the supercharger 16. A secondary post-treatment unit 22 is provided at the outlet of the primary post-treatment unit 15, and a tertiary post-treatment unit 21 is provided at the outlet of the secondary treatment unit 22. The primary post-treatment unit 15 encapsulates the pre-stage DOC and pre-stage SCR, that is, it includes a diesel oxidation catalyst and a selective catalytic reducer, ensuring the minimum temperature drop of the pre-stage post-processor and maintaining the ignition temperature at low and medium load speeds of the diesel engine, enabling the post-treatment system to quickly and efficiently ignite and enter the high-efficiency range for operation. The secondary post-treatment unit 22 encapsulates the post-stage SCR and ASC, that is, it includes a selective catalytic reducer and an ammonia slip catalyst. The tertiary post-treatment unit 21 encapsulates the post-stage DOC and DPF, that is, it includes a diesel oxidation catalyst and a diesel particulate filter. The encapsulation volumes of the secondary post-treatment unit 22 and the tertiary post-treatment unit 21 are made relatively small and are separately encapsulated, which can be flexibly arranged and installed on the vehicle chassis, avoiding various operating mechanisms on the chassis and ensuring the ground clearance of the vehicle, thereby realizing the reasonable installation and efficient matching of the post-treatment system on the vehicle.

[0034] The system architecture also includes a vacuum pump 23. The vacuum pump 23 is arranged at the rear end of the cylinder head assembly 2 and is connected to the camshaft of the cylinder head assembly 2. The vacuum pump 23 is arranged at the upper rear part of the cylinder block 1, which is conducive to the connection of the vehicle vacuum braking system.

[0035] A double-layer gear train is provided on the side of the sprocket chamber 13. The double-layer gear train includes an inner-layer gear train and an outer-layer gear train. The inner-layer gear train includes a crankshaft pulley 12, a water pump pulley 19, a generator pulley 18, and an air-conditioning compressor pulley 11. The corresponding pulleys are connected to the corresponding transmission equipment and fixed on the surface of the cylinder block. The outer-layer gear train includes a crankshaft pulley 12 and a steering pump pulley 20. Both the inner-layer gear train and the outer-layer gear train are driven by belts. An air-conditioning compressor pulley 11 is provided on the right side of the crankshaft pulley 12, and a steering pump pulley 20 is provided on the left side. An automatic tensioner is provided above the crankshaft pulley 12. A water pump pulley 19 is provided at the upper left of the crankshaft pulley 12. A generator pulley 18 is provided at the upper left of the water pump pulley 19. A fixed tensioner is provided above and on the right side of the automatic tensioner respectively. The inner side of the belt of the inner-layer gear train is sequentially fitted with the grooves at the bottom of the crankshaft pulley 12, the upper right side of the automatic tensioner, the bottom of the water pump pulley 19, the left side of the generator pulley 18, the tops of the two fixed tensioners, and the lower right side of the air-conditioning compressor pulley 11 to form different wrap angles respectively. The inner side of the belt of the outer-layer gear train is fitted with the grooves on the right side of the crankshaft pulley 12 and the left side of the steering pump pulley 20. The inner-layer gear train is driven by the crankshaft damper assembly 12 to drive the water pump 19, the generator 18, and the air-conditioning compressor 11. The outer-layer gear chamber is driven by the crankshaft damper assembly 12 to drive the steering pump 20. The air-conditioning compressor 11 is semi-surrounded by the sprocket chamber 12, the cylinder block reinforcement plate 10, and the oil pan 9, making full use of the available space.

Claims

1. A light engine system architecture with a coupled post-processing device, comprising a cylinder block and a cylinder head assembly. The cylinder head assembly is provided at the top of the cylinder block, and a reinforcing plate is provided at the bottom of the cylinder block. It is characterized in that: A sprocket chamber is provided on the side of the cylinder block and cylinder head assembly. An oil pan is provided at the bottom of the cylinder block reinforcement plate. An oil cooler and filter component is provided in the middle of the intake side of the cylinder block. A flywheel plate is provided at the rear end of the cylinder block, and a starter is installed on the flywheel plate. An intake pipe is provided on the right side of the cylinder head assembly, and an EGR valve and a cooler component are installed on the intake pipe. A valve timing mechanism is provided in the sprocket chamber. A silent chain is sleeved on the valve timing mechanism. A fuel injection pump is provided on the sprocket chamber. The silent chain is also connected to the driving end of the fuel injection pump. It further includes a post-treatment device. The post-treatment device includes a primary post-treatment unit. A supercharger is provided at the inlet of the primary post-treatment unit. The supercharger is disposed on the exhaust side of the cylinder block. A secondary post-treatment unit is provided at the outlet of the primary post-treatment unit. A tertiary post-treatment unit is provided at the outlet of the secondary post-treatment unit. A double-layer gear train is provided on the side of the sprocket chamber. The double-layer gear train includes an inner-layer gear train and an outer-layer gear train. The inner-layer gear train includes a crankshaft pulley, a water pump pulley, a generator pulley, and an air-conditioning compressor pulley. The outer-layer gear train includes a crankshaft pulley and a steering pump pulley. Both the inner-layer gear train and the outer-layer gear train are driven by belts.

2. The light engine system architecture of a coupled post-processing device according to claim 1, characterized in that: The oil cooler and filter component is arranged obliquely upward relative to the cylinder block.

3. The light engine system architecture of a coupling post-processing device according to claim 1, characterized in that: The EGR valve and cooler component is a high-pressure EGR valve and is arranged at a high position on the intake pipe.

4. A light engine system architecture of a coupled post-processing device according to claim 1, characterized in that: The primary post-treatment unit includes a diesel oxidation catalyst and a selective catalytic reduction catalyst. The secondary post-treatment unit includes a selective catalytic reduction catalyst and an ammonia trap. The tertiary post-treatment unit includes a diesel oxidation catalyst and a diesel particulate filter.

5. A light engine system architecture of a coupled post-processing device according to claim 1, characterized in that: It further includes a vacuum pump, and the vacuum pump is arranged at the rear end of the cylinder head assembly.

6. The light engine system architecture of a coupled post-processing device according to claim 1, characterized in that: An air-conditioning compressor pulley is provided on the right side of the crankshaft pulley, and a steering pump pulley is provided on the left side. An automatic tensioner is provided above the crankshaft pulley, and a water pump pulley is provided at the upper left of the crankshaft pulley. A generator pulley is provided at the upper left of the water pump pulley. A fixed tensioner is provided above and on the right side of the automatic tensioner respectively.

7. The light engine system architecture of a coupling post-processing device according to claim 1, characterized in that: The inner side of the belt of the inner-layer gear train is sequentially fitted with the belt grooves of the crankshaft pulley, the automatic tensioner, the water pump pulley, the generator pulley, the two fixed tensioners, and the air-conditioning compressor pulley. The inner side of the belt of the outer-layer gear train is fitted with the belt grooves of the crankshaft pulley and the steering pump pulley.

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