CN200955445Y - Straight-column type electric controlled oil-jetting combustion apparatus of vehicle-use diesel engine - Google Patents

Abstract

The utility model relates to an in-line electronically controlled fuel injection combustion device applied by diesel engine vehicles which are attainable in States Standards on Three Emission. The utility model mainly characteristics in that: the utility model adopts an in-line injection pump with a top-gap plunger match part; the utility model is provided with an electronic speed governor and an engine electronic control unit, as well as adopts an EGR (exhaust gas recirculation) with an EGR device. This system is applicable to turbo-charged diesel engine in trucks and buses (including cargo-bus dual-target vehicle). The utility model has the advantages of simple in structure, reliable in operation, easy in maintenance and low in cost. Moreover, the utility model can meet the economical requirement and the practical requirement of developing countries.

Description

Diesel engine for automobile in-line arrangement electronic control injection firing unit

Technical field:

The utility model belongs to diesel engine for automobile, the in-line arrangement electronic control injection firing unit of particularly suitable diesel engine for automobile.

Technical background:

Current, the naturally aspirated Diesel of use mechanical type Injection Pump and speed regulator can not satisfy the requirement to the higher Abgasgesetz of diesel engine for automobile.China will from July 1st, 2007 to diesel engine for automobile state of enforcement 3 standards (seeing Table 1).The relevant now technology that reduces diesel emission mainly contains: high pressure fuel injector, and charge inter cooling, exhaust gas recirculation (EGR), and exhaust aftertreatment (catalytic conversion) etc.And wherein crucial fuel injection system, in order to satisfy higher emission regulation demands, mainly adopt electrically-controlled pump nozzle (electronically unit injector), electronically controlled unit pump (electronically unit pump), electric-controlled co-rail injection system (CRS).These technology are because complex structure, and cost is too high, and after-sales service system is set up factor such as difficulty and is not suitable for the light-duty vehicle that China has a large capacity and a wide range.

The ECD-P electric control linearly arranged pump injection system that a kind of Japan electric coating company is arranged in the prior art, it is in the development product 1980s, displacement with electromagnetic actuator control Injection Pump ratch changes fuel injection quantity, also needs the electro-hydraulic mechanism that a cover is used to control advance angle simultaneously.Nineteen nineties Japan ZEXEL company's T ICS system also is a kind of typical products in last century, and this system adopts the mechanism that is changed pretravel by the timing sleeve, control injection time (referring to SAE paper 940195).After Bosch automotive system company was reorganized into by ZEXEL company afterwards, do not produced this product.The current developing countries press for a kind of diesel engine for automobile that is applicable to, low emission oil jetting combustion device economical and practical and relatively simple for structure.

The emission standard of table 1---diesel engine for automobile

Pointer	GB17691-2001 (state 2) standard	GB17691-2005 (state 3) standard
			NO X(g/kw*h)	7.0	5.0
HC(g/kw*h)	1.1	0.66
			CO(g/kw*h)	4.0	2.1
PT(g/kw*h)	0.15	0.1

The model utility content:

The utility model is that truck and passenger vehicle (containing notchback) provide a kind of and can reach state's 3 emission standards, the diesel electric-controlled oil jetting combustion device of optimum organization.

The technological scheme that the utility model adopted is: design a kind of diesel engine for automobile electronic control injection firing unit, particularly a kind of low emission electronic control injection firing unit that is applicable to turbocharged and intercooled diesel engine, comprising in-line fuel injection pump (1), speed regulator (2), oil sprayer (3), control unit of engine (4) and a plurality of sensor (11,12,13).The feature of the diesel electric-controlled oil jetting combustion device of this optimum organization is: a. is equipped with bottom clearance formula plunger coupled parts (10) in above-mentioned in-line fuel injection pump (1), can strengthen injection advance angle automatically with the raising of Injection Pump rotating speed; B. above-mentioned speed regulator (2) be one by control unit of engine (4) control, adopt the electronic speed regulator of linear scale solenoid actuated; C. in above-mentioned diesel electric-controlled oil jetting combustion device, also comprise a cover Exhaust gas recirculation device EGR (5).The utility model is applicable to truck, light-duty automobile of multipurpose (MPV) and sport vehicle (SUV) etc.

The beneficial effects of the utility model are, can reduce the discharging of diesel engine, reach the requirement of state 3 (being equivalent to Europe 3) standard, and relatively simple for structure, reliable operation, and easy to maintenance, cost is lower, can satisfy the requirement of economics of underdevelopment practicality.

Description of drawings:

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is a diesel engine for automobile electronic control injection firing unit embodiment's of the present utility model installation drawing.

Fig. 2 is a kind of in-line fuel injection pump that adopted of the utility model embodiment and the sectional view of electronic speed regulator.

Fig. 3 is the fundamental diagram of Exhaust gas recirculation device.

1. in-line fuel injection pumps among the figure, 2. speed regulator, 3. oil sprayer, 4. control unit of engine ECU, 5 Exhaust gas recirculation device EGR, 6. exhaust-gas turbochargers, 7. intercooler, 10 bottom clearance formula plunger coupled partss, 11, more than 12,13. sensor, 21. linear scale electromagnet, 22, Injection Pump control rod link, 40. diesel engines, 51. exhaust gas recirculation valve, 52. gaseous effluents, 53. exhaust gas recirculation pipelines.

Embodiment:

In the utility model embodiment shown in Figure 1, motor (40) is a kind of turbocharged and intercooled diesel engine with Exhaust gas recirculation device EGR (5).Inlet air enters in the cylinder of diesel engine (40) through pressurized machine (6) pressurization and after intercooler (7) cooling.In order to reduce discharging, under the control of EGR (5), a part of waste gas reenters in the cylinder of diesel engine and carries out recirculation.By motor (or camshaft) rotating speed that a plurality of sensors (11,12,13) that are installed on the diesel engine diverse location are gathered, suction pressure, intake temperature, various signals such as Injection Pump control rod link position are all imported among the control unit of engine ECU (4).Input signal is after ECU carries out data processing by the program that is provided with, again control signal is outputed to actuator's linear scale electromagnet (21) of electronic speed regulator (2) and the actuator's exhaust gas recirculation valve (51) (referring to Fig. 2 and Fig. 3) among the EGR (5), realize optimization control.Oil sprayer shown in the figure (3) adopts the hole nozzle with a plurality of spray orifices, and the spray orifice number is more than 4 holes, and the aperture helps reducing particulate emission (PT) below 0.25mm.This is a kind of common mechanical hydraulic-pressure type oil sprayer, and it is simpler than the electric-controlled fuel injector that co-rail oil injection system adopts, so cost is lower.

Bottom clearance formula plunger coupled parts (10) is housed in in-line fuel injection pump shown in Figure 2 (1), on the length of the about 2mm of plunger head one segment length, reduced 0.10～0.18mm, make between plunger head and the plunger bushing and form certain clearance; Also can make skewed slot or helical groove structure, the commencement of fuel supply is adjusted with load, change in rotational speed at plunger head.Bottom clearance formula plunger coupled parts can utilize the fluid power effect to change the commencement of fuel supply and fuel injection correction discharge curve, injection advance angle in the time of can making high rotating speed strengthens about 2 ° (moral periodical " ATZ " 1989 11 phases, translation carries 45～48 pages of " external internal-combustion engine " the 3rd phases of nineteen ninety) automatically.Therefore do not need to install the mechanical type advancing device in device described in the utility model, also do not need the electric-controlled type advancing device, help reducing the rate of fault of device, simplified structure reduces cost, and can reduce driving torque and power consumpiton.Speed regulator shown in Figure 2 (2) is an electronic speed regulator by control unit of engine ECU control.Wherein the position of Injection Pump control rod link (22) is by linear scale electromagnet (21) control, and draw rod positions feeds back to ECU (4) by displacement transducer.

As shown in Figure 3, Exhaust gas recirculation device EGR (5) is by automatically controlled exhaust gas recirculation valve (51), and gaseous effluent (52) and recirculating line (53) are formed.Wherein cooler for recycled exhaust gas (52) requires heat-resistingly, corrosion-resistant, and it is a water-cooled heat exchanger made from stainless steel material, and cooling liquid flows in that pipe is outer, and waste gas is mobile in pipe.On the heat dissipating pipe of cooler, has the spiral chute that strengthens radiating efficiency.

More than help to understand technology contents of the present utility model about the utility model embodiment's explanation, but do not limit or dwindle the protection domain of the utility model patent.Protection domain of the present utility model is as the criterion with claims.In this scope, fully other variations or modification can be arranged.Every do not have the creative protection domain of breaking through that still belongs to this patent to technology of the present utility model.

Claims (5)

1. diesel engine for automobile in-line arrangement electronic control injection firing unit, comprising in-line fuel injection pump (1), speed regulator (2), oil sprayer (3), control unit of engine (4) and a plurality of sensor (11,12,13) is characterized in that:

A., bottom clearance formula plunger coupled parts (10) is housed in above-mentioned in-line fuel injection pump (1), can strengthens injection advance angle automatically with the raising of Injection Pump rotating speed;

B. above-mentioned speed regulator (2) be one by control unit of engine (4) control, adopt the electronic speed regulator of linear scale solenoid actuated;

C. in above-mentioned diesel engine in-line arrangement electronic control injection firing unit, also comprise a cover Exhaust gas recirculation device EGR (5).

2. diesel engine for automobile in-line arrangement electronic control injection firing unit according to claim 1 is characterized in that wherein Exhaust gas recirculation device EGR (5) by automatically controlled exhaust gas recirculation valve (51), and gaseous effluent (52) and recirculating line (53) are formed.

3. diesel engine for automobile in-line arrangement electronic control injection firing unit according to claim 1 is characterized in that oil sprayer (3) wherein adopts the hole nozzle with a plurality of spray orifices, and the spray orifice number is more than 4 holes, and the aperture is below 0.25mm.

4. diesel engine for automobile in-line arrangement electronic control injection firing unit according to claim 2, it is characterized in that cooler for recycled exhaust gas (52) wherein is the water-cooled heat exchanger made from stainless steel material, cooling liquid flows outside pipe, waste gas flows in pipe, has the spiral chute that strengthens radiating efficiency on the cooler heat dissipating pipe.

5. diesel engine for automobile in-line arrangement electronic control injection firing unit according to claim 2 is characterized in that described diesel engine is a turbocharged and intercooled diesel engine, and exhaust-gas turbocharger (6) and intercooler (7) are housed.

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