CN201090286Y - Diesel engine - Google Patents

Abstract

The utility model discloses a diesel engine, which comprises diesel engine parts, a water pump assembly is arranged at middle upper part of front end of diesel engine, the water outlet of the water pump is directly connected with the water cavity of engine body by the pipeline of inner cavity of timing gear chamber, an air compressor and a steering pump are arranged at right side of the timing gear chamber, a generator is arranged at upper part of front end of diesel engine by engine bracket, a machine-oil filter is arranged at right lower part of front end of diesel engine, a machine-oil filling opening is arranged at left upper part of the timing gear chamber, a high-pressure common trail device is arranged at the middle part of the diesel engine, six slots are arranged on a crankshaft belt wheel. The utility model has the advantages of strong power, goo economy, compact structure, and convenient maintenance. The utility model is applicable for large-medium bus.

Description

a diesel engine

technical field

The utility model relates to a diesel engine, in particular to a diesel engine for passenger cars.

Background technique

With the country's emphasis on vehicle engine emissions, the market's demand for low-emission engines is very urgent. Especially for large and medium-sized passenger cars, diesel engines need to be powerful, economical, compact and easy to maintain. But existing diesel engine is because its supporting parts are scattered relatively, and volume is huge, is used on the large and medium-sized bus and is inconvenient to maintain.

Contents of the invention

The technical problem to be solved by the utility model is to provide a diesel engine with strong power, good economy and compact structure, which is suitable for power matching of large and medium-sized passenger cars.

In order to solve the above-mentioned technical problems, the utility model includes various parts of the diesel engine, and its structural feature is that a water pump assembly is installed on the middle and upper part of the front end of the diesel engine, and the water outlet of the water pump is directly connected with the water cavity of the body through the internal cavity pipeline of the timing gear , the air compressor and steering pump are installed on the right side of the timing gear chamber, the generator is installed on the upper front end of the diesel engine through the generator bracket, the oil filter is installed on the lower right front end of the diesel engine, and the oil filling port is located in the timing gear chamber On the upper left, a high-pressure common rail device is installed in the middle of the diesel engine.

The high-pressure common rail device includes a high-pressure common-rail pipe installed in the middle of the diesel engine. A high-pressure pump, a fuel fine filter, a fuel primary filter and an ECU are installed from front to back on the left side of the diesel engine under the high-pressure common-rail pipe. The fuel pipe is connected to the ECU, the ECU is connected to the fuel fine filter through the low-pressure fuel pipe, the fuel fine filter is connected to the high-pressure pump through the low-pressure fuel pipe, the high-pressure pump is connected to the high-pressure common rail pipe through the high-pressure fuel pipe, and the high-pressure common rail pipe is connected to the electric control injection nozzle through the high-pressure fuel pipe. oiler.

As an improvement to the diesel engine, there are six slots on the crankshaft pulley, of which the inner two slots are used to drive the water pump pulley, and the other four slots are used for the power output of the air conditioner compressor and fan.

After adopting the above structure, since the water pump assembly is arranged at the middle and upper part of the front end of the diesel engine, the length of the water channel is shortened. The air compressor and steering pump are installed on the right side of the timing gear chamber, and the matching connections of the air inlet and outlet, and oil inlet and outlet pipelines are very convenient. The generator is placed on the upper front end of the diesel engine with a large space, away from heat sources such as exhaust pipes. The oil filling port is located on the upper left part of the timing gear chamber, where there is a large space for easy oil filling. The oil filter is located at the lower right of the front end of the diesel engine, making maintenance more convenient. It overall meets the needs of large and medium-sized passenger cars for diesel engines with strong power, good economy and compact structure.

Description of drawings

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail:

Fig. 1 is the structural representation of the front view of the utility model;

Fig. 2 is a schematic diagram of the right view structure of Fig. 1;

Fig. 3 is a schematic diagram of the left view of Fig. 1 .

Detailed ways

With reference to the accompanying drawings, in order to meet the matching needs of the rear engine of the passenger car, the main accessories of the diesel engine are optimally designed at the front end of the diesel engine. The water pump assembly 4 is installed, the water pump water inlet 6 faces to the left, and the water pump water outlet is directly connected with the water cavity of the body through the timing gear chamber cavity pipeline, shortening the length of the water channel. Air compressor 1 and steering pump 10 are installed on the right side of the timing gear chamber, and the matching connection of air inlet and outlet and oil inlet and outlet pipelines is very convenient. Generator 3 is installed on the front end upper part of diesel engine by generator bracket, away from heat sources such as exhaust pipe, drives generator by water pump pulley, and engine nameplate 2 is installed on the generator bracket of diesel engine. The oil filter 9 is installed at the lower right part of the front end of the diesel engine, which makes maintenance more convenient. The engine oil filling port 12 is located at the left upper part of the timing gear chamber, where the space is larger and convenient for adding engine oil. A high-pressure common rail device is installed in the middle of the diesel engine. The high-pressure common rail device includes a high-pressure common rail pipe 15 installed in the middle of the diesel engine. On the left side of the diesel engine below the high-pressure common rail pipe 15, a high-pressure pump 13, a fuel fine filter 14, and a fuel oil filter are installed from front to back. Coarse filter 16 and ECU19, primary fuel filter 16 communicates with ECU19 through low-pressure fuel pipe 17, ECU19 communicates with fuel fine filter 14 through low-pressure fuel pipe 17, fuel fine filter 14 communicates with high-pressure pump 13 through low-pressure fuel pipe 17, high-pressure pump 13 passes through high-pressure fuel pipe 18 communicates with the high-pressure common rail pipe 15, and the high-pressure common rail pipe 15 communicates with the electronically controlled fuel injector through the high-pressure oil pipe 18. ECU19 determines the fuel injection quantity according to the information of diesel engine speed and load from the sensor, according to the technical data stored in ECU19, and then corrects the fuel quantity according to the information from sensors such as water temperature sensor, intake air temperature and pressure sensor, etc., and finally The corrected oil quantity sends instructions to the electronically controlled fuel injector, and the electronically controlled fuel injector injects timely and appropriate amount of fuel to the combustion chambers of each cylinder according to the requirements of the ECU19 instruction to complete the combustion process of the diesel engine. There are six grooves on the crankshaft pulley 11, of which the inner two grooves are used to drive the water pump pulley, and the other four grooves are used for the power output of the air conditioner compressor and fan, and are installed between the crankshaft pulley 11 and the water pump pulley through the tensioner seat 7 Tensioner 5 is arranged. Diesel engine rear flywheel and flywheel housing 8 interface dimensions maintain the same interface as WD615 Euro II diesel engine, which can be easily connected. But through the change of the connecting structure between the flywheel and the rear end of the crankshaft, the installation position of the flywheel is moved forward correspondingly to the front end of the engine, and finally the length of the flywheel housing 8 is shortened by 25mm. The supporting structure of the rear end shortens the overall length of the diesel engine and makes the structure of the diesel engine more compact under the premise of maintaining the matching size and reliability.

This type of diesel engine is designed according to the supporting requirements of passenger car engines. It adopts the electronically controlled high-pressure common rail fuel injection system produced by BOCSH Company to optimize and match the combustion system, intake and exhaust system of the diesel engine. The emission meets the requirements of Euro III standards. It has good economy, energy saving and environmental protection, compact structure and beautiful appearance, which solves the problem that the current Chinese bus products lack ideal supporting power. It can meet the power supporting needs of large luxury tourist buses, long-distance passenger transport (10m-13.7m) and urban buses over 11m.

Claims (3)

1. A diesel engine, comprising various parts of the diesel engine, is characterized in that a water pump assembly (4) is installed at the middle and upper part of the front end of the diesel engine, and the water pump outlet is directly connected with the water cavity of the body through the timing gear chamber pipeline, The air compressor (1) and the steering pump (10) are installed on the right side of the timing gear chamber, the generator (3) is installed on the upper part of the front end of the diesel engine through the generator bracket, and the oil filter (9) is installed on the right side of the front end of the diesel engine. At the bottom, the oil filling port (12) is located at the upper left part of the timing gear chamber, and a high-pressure common rail device is installed in the middle of the diesel engine. 2. The diesel engine according to claim 1, characterized in that the high-pressure common rail device includes a high-pressure common-rail pipe (15) installed in the middle of the diesel engine, and the left side of the diesel engine below the high-pressure common-rail pipe (15) is from front to back A high-pressure pump (13), a fine fuel filter (14), a primary fuel filter (16) and an ECU (19) are installed, the primary fuel filter (16) communicates with the ECU (19) through a low-pressure oil pipe (17), and the ECU (19) The low-pressure fuel pipe (17) is connected with the fuel fine filter (14), the fuel fine filter (14) is connected with the high-pressure pump (13) through the low-pressure fuel pipe (17), and the high-pressure pump (13) is connected with the high-pressure common rail through the high-pressure fuel pipe (18) The pipe (15) is connected, and the high-pressure common rail pipe (15) is connected to the electronically controlled fuel injector through the high-pressure oil pipe (18). 3. The diesel engine according to claim 1, characterized in that six grooves are provided on the crankshaft pulley (11).

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