CN204827729U

CN204827729U - Novel fuel feed system

Info

Publication number: CN204827729U
Application number: CN201520543514.1U
Authority: CN
Inventors: 李志鹏
Original assignee: Jiangling Motors Corp Ltd
Current assignee: Jiangling Motors Corp Ltd
Priority date: 2015-07-25
Filing date: 2015-07-25
Publication date: 2015-12-02
Anticipated expiration: 2025-07-25

Abstract

The utility model discloses a novel fuel feed system, include oily pump control moulding piece, oil pump, check valve, fire oil pipe way, fuel filter, low pressure oil circuit sensor, high -pressure pump, ECU and oil tank, MCU unit in the oil pump control moulding piece passes through FCE signal line, KL15 signal line, ACC signal line and CAN bus connection ECU, the output port of oil pump fires the oil pipe way through one and connects the high -pressure pump, and the oil pump sets gradually check valve, fuel filter and low pressure oil circuit sensor to the oil pipe way of firing between the high -pressure pump, and the signal output part of low pressure oil circuit sensor connects ECU, the oil pump sets up the inside at the oil tank. Compared with the prior art, the beneficial effects of the utility model are that: (1 )Reduce fuel consumption, reduce carbon and discharge, improve fuel economy, (2 )Reduce vehicle electric system's load etc.

Description

A kind of novel fuel supply system

Technical field

The utility model relates to motor car engine fuel feeding field, specifically a kind of novel fuel supply system.

Background technique

What existing market gasoline feeder adopted is conventional fuel oil supply system: namely in order to ensure that low pressure fuel system can reliably to motor supply fuel oil at any one time, fuel pump power is in all the time far above its a maximum demand under extreme environmental conditions and keeps invariable pressure maximum demand, this oil supply system mode, we are often referred to as constant pressure and flow supply system.

Generally, unnecessary in constant pressure and flow fuel oil supply system fuel oil can keep oil nozzle to spray invariable relief valve by one turning back in fuel tank.According to tester: " when especially travelling in urban district, the speed of a motor vehicle is low and have a large amount of idling to stop, almost have 99% to pump fuel oil profit have more than is needed and return fuel tank ".This shows, conventional fuel oil supply system has the following disadvantages:

(1) a large amount of high temp oil-fireds is back in fuel tank, causes fuel-steam to increase, and increases canister load, and makes pipeline more easily produce vapour lock, affect vehicle performance;

(2) fuel pump causes its noise to increase under being in high load (pressure, flow etc.) working state for a long time, shortens the operating life of fuel pump and fuel filter;

(3) a large amount of high temp oil-fired backflow, fuel-steam more easily evaporate in air, improves carbon emission, and fuel consumption increases greatly simultaneously.

Model utility content

The purpose of this utility model is to provide a kind of novel fuel supply system, to solve the problem proposed in above-mentioned background technology.

For achieving the above object, the utility model provides following technological scheme:

A kind of novel fuel supply system, comprise oil pump control module, oil pump, one-way valve, fuel pipe, fuel filter, low pressure oil way sensor, high-pressure service pump, ECU and fuel tank, MCU unit in described oil pump control module is connected ECU by FCE signaling line, KL15 signaling line, ACC signaling line with CAN, and the output terminal of MCU unit connects Watchdog circuit and oil pump; The output port of described oil pump connects high-pressure service pump by a fuel pipe, and the fuel pipe between oil pump to high-pressure service pump sets gradually one-way valve, fuel filter and low pressure oil way sensor, and the signal output part of low pressure oil way sensor connects ECU; Oil pump is arranged on the inside of fuel tank.

As further program of the utility model: the oil suction port of oil pump connects just considers device.

As further program of the utility model: described oil pump control module is made up of power circuit, MCU unit and Watchdog circuit, MCU unit and Watchdog circuit are all connected to power circuit output end, and the input end of power circuit is GDN signaling interface and KL30 signaling interface.

As further program of the utility model: arrange the fuel pipe that another root connects fuel tank between fuel filter and low pressure oil way sensor, this fuel pipe arranges Decompression valves.

As further program of the utility model: low pressure oil way sensor is piezoresistive pressure transducer.

Compared with prior art, the beneficial effects of the utility model are:

(1) reduce fuel consume, reduce carbon emission, improve fuel economy;

(2) load of vehicle electrical systems is reduced;

(3) eliminating excessive fuel oil gets back in fuel tank, thus the fuel oil temperature reduced in fuel tank, decrease the fuel-steam in fuel tank, and reduce the fuel-steam loss therefore caused, canister load in final reduction gasoline engine system, decreases in pipeline because steam too much produces the possibility of vapour lock simultaneously;

(4) to oil-fired system, there are protection and fault diagnosis functions, improve oil supply system Security;

(5) reduce the noise that fuel pump is in operation, thus add the life-span of fuel pump;

(6) working life of filter cleaner is extended.

Accompanying drawing explanation

Fig. 1 is core component oil pump control module principle schematic diagram of the present utility model.

Fig. 2 is the principle of fuel feeding as required effect schematic diagram of the present utility model.

In figure: GDN signaling interface 1, KL30 signaling interface 2, oil pump control module 3, power circuit 4, MCU unit 5, FCE signaling line 6, KL15 signaling line 7, ACC signaling line 8, CAN 9, Watchdog circuit 10, pwm signal 11, oil pump 12, just worry device 13, Decompression valves 14, one-way valve 15, fuel pipe 16, fuel filter 17, low pressure oil way sensor 20, high-pressure service pump 22, ECU23, fuel tank 24.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technological scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.

Refer to Fig. 1 ~ 2, in the utility model embodiment, a kind of novel fuel supply system, comprise oil pump control module 3, oil pump 12, Decompression valves 14, one-way valve 15, fuel pipe 16, fuel filter 17, low pressure oil way sensor 20, high-pressure service pump 22, ECU23 and fuel tank 24, described oil pump control module 3 is by power circuit 4, MCU unit 5 and Watchdog circuit 10 form, the output terminal of MCU unit 5 connects Watchdog circuit 10 and oil pump 12, MCU unit 5 and Watchdog circuit 10 are all connected to power circuit 4 output terminal, and the input end of power circuit 4 is GDN signaling interface 1 and KL30 signaling interface 2, KL30 signaling interface 2 and GND signaling interface 1 to be run for oil pump control module 3 by power circuit 4 and provide power supply, MCU unit 5 in described oil pump control module 3 is by FCE signaling line 6, KL15 signaling line 7, ACC signaling line 8 is connected ECU23 with CAN 9, wherein ECU23 passes through FCE(FuelControlEnable) stopping of signal 6 control oil pump 12 and operation, that is to say that the signal of FCE signaling line 6 has override power, FCE signaling line 6 simultaneously, KL15 signaling line 7 and ACC signaling line 8 are changed (as closed as the internal state of oil pump control module 3, sleep, low power consumption, normally, standby etc.) control signal, MCU unit 5 transfers high level signal to after carrying out inter-process according to pwm signal 11 dutycycle that CAN 9 is transmitted, and directly drived control is carried out to oil pump 12, when MCU unit 5 internal processes occur race fly or mistake time, and when oil pump control module 3 internal circuit breaks down, directly act on oil pump 12 by directly being exported 100% duty cycle signals (high level namely continued) output by Watchdog circuit 10, in addition, failure diagnosis information, when internal circuit breaks down, is fed back to ECU23 by CAN by oil pump control module 3.

The output port of described oil pump 12 connects high-pressure service pump 22 by a fuel pipe 16, and the fuel pipe 16 between oil pump 12 to high-pressure service pump 22 sets gradually one-way valve 15, fuel filter 17 and low pressure oil way sensor 20, the signal output part of low pressure oil way sensor 20 connects ECU23, thus realizes the detection of oil pressure in fuel pipe 16; The fuel pipe 16 that another root connects fuel tank 24 is set between fuel filter 17 and low pressure oil way sensor 20, this fuel pipe 16 arranges Decompression valves 14; Pressurized fuel is sent into one-way valve 15 after rotating by oil pump 12 motor, fuel oil flow through fuel pipe 16 and in fuel filter 17 filter after, and regulate pipeline fuel delivery by Decompression valves 14, now pressurized fuel flows to low pressure oil way sensor 20, finally supply high-pressure service pump 22, final feeding motor sprays device and completes pressurized fuel igniting.

Described oil pump 12 is arranged on the inside of fuel tank 24, and the oil suction port of oil pump 12 connects just worry device 13.

Above-mentioned low pressure oil way sensor 20 is piezoresistive pressure transducer, namely be adopt integrated technique resistor stripe to be integrated on single crystal silicon diaphragm, the one side of silicon diaphragm is by the hyperbaric chamber of measuring pressure UNICOM, another side is the low-pressure cavity be communicated with air, and its circuit is tied by the resistor stripe of two tension stress and the resistor stripe of another two compression chords and formed full-bridge.When low pressure oil way sensor 20 detects the pressure signal of fuel pipe 16, full-bridge resistance value produces respective change, and then causes level signal to change and feed back ECU23.

Fueling strategy as required of the present utility model is: fuel pipe 19 pressure measured by low pressure oil way sensor 20, by actual pressure information feed back to ECU23, ECU23 is according to the deviation of goal pressure and actual pressure, calculate the dutycycle of the pwm signal 11 controlled for oil pump 12, be transferred to oil pump control module 3 control oil pump 12 motor speed through CAN 9 interface, finally complete delivery pressure fuel oil as required; Oil pump control module 3 and ECU23 exchange oil pump control module 3 failure diagnosis information by CAN 9 simultaneously, thus reach object oil pump 12 and oil pump control module 3 being realized to closed loop control.

To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any reference character in claim should be considered as the claim involved by limiting.

In addition, be to be understood that, although this specification is described according to mode of execution, but not each mode of execution only comprises an independently technological scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technological scheme in each embodiment also through appropriately combined, can form other mode of executions that it will be appreciated by those skilled in the art that.

Claims

1. a novel fuel supply system, comprise oil pump control module, oil pump, one-way valve, fuel pipe, fuel filter, low pressure oil way sensor, high-pressure service pump, ECU and fuel tank, it is characterized in that, MCU unit in described oil pump control module is connected ECU by FCE signaling line, KL15 signaling line, ACC signaling line with CAN, and the output terminal of MCU unit connects Watchdog circuit and oil pump; The output port of described oil pump connects high-pressure service pump by a fuel pipe, and the fuel pipe between oil pump to high-pressure service pump sets gradually one-way valve, fuel filter and low pressure oil way sensor, and the signal output part of low pressure oil way sensor connects ECU; Oil pump is arranged on the inside of fuel tank.

2. a kind of novel fuel supply system according to claim 1, is characterized in that, the oil suction port of oil pump connects just considers device.

3. a kind of novel fuel supply system according to claim 1, it is characterized in that, described oil pump control module is made up of power circuit, MCU unit and Watchdog circuit, MCU unit and Watchdog circuit are all connected to power circuit output end, and the input end of power circuit is GDN signaling interface and KL30 signaling interface.

4. a kind of novel fuel supply system according to claim 1, is characterized in that, arranges the fuel pipe that another root connects fuel tank, this fuel pipe arranges Decompression valves between fuel filter and low pressure oil way sensor.

5. a kind of novel fuel supply system according to claim 1, is characterized in that, low pressure oil way sensor is piezoresistive pressure transducer.