CN2835598Y - Diesel engine - Google Patents

Abstract

The utility model relates to a diesel engine, which adopts a cylinder body with a no-cylinder sleeve structure composed of an air cylinder body (1) and a lower air cylinder body (1), a direct-spray combustion chamber, an electric heating plug, sixteen air valves (each cylinder is provided with four air valves), a middle-mounted oil sprayer, a middle-mounted combustion chamber, a double-cam shaft adopted in a gas distributing system, a hydraulic tappet and a roller rocking arm. A piston is cast with an inner cooling oil passage, and adopts a thin piston ring and an oil ring steel sheet types; a crankshaft is provided with eight integral balancing blocks, the round angles of shaft journals are rolling transition round angles; an accessory driving system is driven by a metal chain, and a hydraulic tensioning and a mechanical tensioning devices are arranged on a driving chain. The displacement of the diesel engine provided by the utility model is 1.60-2 liters, the rated power of the diesel engine is 50-98KW, the torque of the diesel engine is 130-320 newtons/ meter, the lowest fuel oil consumption rate of the external characteristic is 208 grams / KW / hour, and the discharge of the diesel engine achieves the third in Europe and has the potentialities of achieving the fourth in Europe. The utility model is mainly used as matching power for passenger vehicles, particularly cars, SUV, etc.

Description

a diesel engine

technical field

The utility model relates to the field of internal combustion engines, in particular to a diesel engine.

Background technique

As my country's auto industry attaches great importance to controlling vehicle exhaust emissions and improving fuel economy, Euro 3 emission regulations and fuel economy regulations have begun to be implemented. A new generation of diesel engine with high mass volume and high power; for example, Southeast Auto Delica has no suitable diesel engine.

Contents of the invention

Aiming at the deficiencies in the above-mentioned prior art, the utility model provides a diesel engine, which consists of a cylinder block, a lower cylinder block, a cylinder head, a piston and a crank connecting rod mechanism, a gas distribution system, a supercharged and intercooled intake system, an exhaust It is composed of components such as exhaust gas recirculation system, fuel supply system, cooling system, lubrication system, and accessory drive system. Its structure is reciprocating piston type, vertical inline four-cylinder, four-stroke, water-cooled, bore 80mm, stroke 80-94mm . The electronically controlled high-pressure common rail fuel injection system is characterized in that it adopts a two-body cylinder block, a cylinder liner-less structure, a direct injection combustion chamber, a glow plug, 4 valves per cylinder and a total of 16 valves, a central injector and a combustion chamber, The gas distribution system is double camshaft, hydraulic tappet, and roller rocker arm.

The piston and crank connecting rod mechanism adopts a ring groove inlaid with cast iron groove, the height of the piston is 73mm, and the compression height is 48mm.

The crankshaft is made of high-strength forged steel alloy, the journal is rounded and rolled, and has 8 integral balance weights.

The timing drive system adopts metal chain transmission, hydraulic tension and mechanical tension.

The fuel supply system adopts high-voltage electric control for multiple injections per working cycle, which is a closed-loop control.

The diesel engine provided by the utility model is equipped with an electronically controlled high-pressure common rail fuel injection system, with a cylinder diameter of 80, a stroke of 80 to 94, and a power of 50 to 95 kilowatts. A new generation of diesel engines.

After adopting the above-mentioned scheme, the diesel engine provided by the utility model has a displacement of 1.60-2 liters, a rated power of 50-98 kW, a torque of 130-320 Nm, and the minimum fuel consumption rate of 208 g/kWh in external characteristics, and the emission reaches the European standard. No. 3 and has the potential to reach a European No. 4. It is mainly used as supporting power for passenger cars, especially cars and SUVs.

Description of drawings:

Fig. 1 is a side view structural diagram of the utility model.

Fig. 2 is the schematic diagram of the front view structure of the utility model

The specific implementation will be described in conjunction with the accompanying drawings and the embodiments thereof.

A diesel engine, which consists of a cylinder block 1, a lower cylinder block 2, a cylinder head 3, a piston 4, a crank connecting rod mechanism 5, a gas distribution system 6, a supercharged and intercooled intake system 7, an exhaust and exhaust gas recirculation system 8 , Fuel supply system 9, cooling system, lubrication system, accessory drive system and other components. Its structural form is reciprocating piston type, vertical in-line four-cylinder, four-stroke, water-cooled, bore 80, stroke 80-94, electronically controlled high-pressure common rail fuel injection system.

Cylinder block 1 of the diesel engine: alloy cast iron, no cylinder liner structure, short gantry structure, so that the rigidity and strength are better, the cylinders are arranged in a straight line, the cylinder diameter is 80 mm, the distance between the cylinder centers is 88 mm, and the total height of the cylinder block is 244.5 mm ; Lower cylinder block 2: aluminum alloy, designed with high rigidity on the curved surface, which can increase the rigidity of the cylinder block assembly and help reduce noise and vibration; cylinder head 3: aluminum alloy, 4 valves per cylinder, 16 valves in total, each cylinder The injectors are arranged vertically in the center. This design scheme increases the intake air volume and reduces pumping loss. The combination of spiral intake ports and tangential intake ports for each cylinder achieves low swirl ratio and high flow coefficient. The fuel injection is placed in the middle of the cylinder head. The device can make the flow rate of each oil beam sprayed out of the nozzle hole the largest and without difference. Piston 4 and crank-connecting rod mechanism 5: Piston 4 is placed in the middle of the direct injection ω-shaped necking combustion chamber to reduce the heat load of the piston and facilitate the formation of intake vortex and compression vortex. The piston skirt is sprayed with graphite, and the compression height of the piston is 48mm. The height is 73 mm, a grooved heat insulation ring is used, and a thin piston ring is used. The cooperation between the piston pin and the piston pin hole and the bushing hole of the small end of the connecting rod adopts a full floating type. The axial clearance of the piston air ring groove is 1.2 mm. The axial width of the oil ring groove is 3 mm, with built-in cooling oil passages, the diameter of the large connecting rod end is 54 mm, the diameter of the small end of the connecting rod is 30 mm, and the center distance between the large and small end holes of the connecting rod is 144-149 mm; the material of the crankshaft is high-strength alloy satin Steel, journal fillet rolling, full support structure and 8 balance weights, main shaft diameter 60 mm, connecting rod shaft diameter 50 mm, front rubber torsional vibration damper, rear flywheel and crankshaft position sensor signal plate; gas distribution System 6: Double overhead camshafts are adopted, and the camshaft material is chilled alloy cast iron, adjustment-free hydraulic tappets, low-friction roller rocker arms; chain transmission is adopted for gas distribution timing, and hydraulic tensioning and mechanical tensioning methods are adopted; Supercharged and intercooled air intake system 7: The air intake adopts turbocharging and air-to-air intercooler to increase the intake air density; exhaust and exhaust gas recirculation system 8: The material of the exhaust pipe is made of high-temperature resistant ductile iron, and the after-treatment device of the oxidation catalyst , using exhaust gas recirculation valve and vacuum module; fuel supply system 9: electronically controlled high-pressure common rail fuel injection system, fuel injection pressure 1450-1600 bar, can realize multiple injections per working cycle, diesel filter that can separate diesel and water Cleaner; Cooling system: Adopt the method of cooling liquid entering the cylinder block and cylinder head and exiting the cooling liquid from the cylinder block and cylinder head, closed forced cooling method, divided into large and small cycles according to the temperature of the cooling liquid; Lubrication system: Adopt pressure and Combined with splash lubrication, lubricating oil is cooled and filtered; accessory drive system: wedge-shaped belt drive, mechanical automatic tensioning device.

Claims (5)

1. A diesel engine, comprising a cylinder block (1), a lower cylinder block (2), a cylinder head (3), a piston (4), a crank connecting rod mechanism (5), a gas distribution system (6), a supercharged intercooler Intake system (7), exhaust and exhaust gas recirculation system (8), fuel supply system (9), cooling system, lubrication system, accessory drive system components, the structure of which is reciprocating piston type, vertical inline four-cylinder , four-stroke, water-cooled, bore 80mm, stroke 80-94mm, electronically controlled high-pressure common rail fuel injection system, characterized in that: cylinder block (1) and lower cylinder block (2) are used to form a cylinder block with no liner structure , direct injection combustion chamber, glow plug, 4 valves per cylinder, a total of 16 valves, mid-mounted injectors and combustion chambers, double camshafts, hydraulic tappets, and roller rocker arms are used in the gas distribution system. 2. The diesel engine according to claim 1, characterized in that: the piston (4) and the crank-connecting rod mechanism (5) adopt a ring groove inlaid with cast iron groove, the height of the piston is 73 mm, the compression height is 48 mm, and the piston is cast with internal cooling The oil channel adopts thin piston ring and oil ring steel sheet type. 3. The diesel engine according to claim 1, characterized in that: the crankshaft made of high-strength forged steel alloy has eight integral balance weights, and the fillet of the journal is a rolling transition fillet. 4. The diesel engine according to claim 1, characterized in that: the timing drive of the accessory drive system is driven by a metal chain, and hydraulic tension and mechanical tension devices are arranged on the transmission chain. 5. The diesel engine according to claim 1, characterized in that: the fuel supply system (9) adopts a closed-loop control high-voltage electronic control structure, and injects multiple times in each working cycle.

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