CN2247806Y - Chinese character display automotive fault finder - Google Patents
Chinese character display automotive fault finder Download PDFInfo
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- CN2247806Y CN2247806Y CN 96212355 CN96212355U CN2247806Y CN 2247806 Y CN2247806 Y CN 2247806Y CN 96212355 CN96212355 CN 96212355 CN 96212355 U CN96212355 U CN 96212355U CN 2247806 Y CN2247806 Y CN 2247806Y
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Abstract
The utility model relates to an automotive fault finder by Chinese character display, which comprises a finder body 1, an automobile series interface device 3 and software cards 6, wherein, the number of the software cards 6 is one to eight, and the software cards 6 are suitable for the automobiles of various types. The software cards 6 are connected with the main control circuitboard 10 of the finder body 1 by the bus interface device of the finder body 1. The finder body 1 is provided with a Chinese display screen 11. The main control circuitboard 10 is provided with a monolithic microcomputer 101 and a serial communication port 105. The software card 6 is provided with a read only memory 61-65 and logic gate arrays 70, 71. The utility model is suitable for the fault finding of cars of various series and types. The utility model has the advantages that Chinese display of the screen, simple operation, easy learning, easy use, cabinet structure, and portable effect are realized. The utility model is suitable for site operation of the maintenance field and the workshop of the automobile.
Description
The utility model relates to auto repair maintenance technology, particularly relates to utilizing microcomputer and interfacing and related software thereof to look into the instrumentation of examining vehicle failure.
Modern many Japan and European and American countries car are extensive use of computer, hydrostatic control and Electromechanical Design, and they are all very complicated, are difficult to the measure that intuitive judgment trouble location and decision should be taked after breaking down.So; more senior a little car all has detection and self-diagnostic function voluntarily; directly monitor the state and the performance of each parts, each circuit by computer,, send instruction immediately if any unusual or damage; remind the person for driving a car to overhaul as early as possible; and can be by the fault finder of special use, for example demoder is read the failure code that automobile computer is sent to particular diagnosis seat or signal specific lamp; thereby determine trouble location, understand fault type.
The prior art vehicle failure checks that the subject matter that diagnostic device exists at first is, each equipment can only be looked into and examine the car that corresponding a kind of car is, for example be used to look into the equipment of examining European car system benz (BENZ), BMW (BMW), rich and powerful people's (VOLVO) trade mark car of etc.ing and can not be used to look into and examine Japanese car system and U.S. vehicle is, to examine Japanese car be that the equipment of Honda (HONDA), Lexus (LEXUS), Mazda trade mark cars such as (MAZDA) can not be looked into again and examines Europe or U.S. vehicle is otherwise be used to look into.For adapting to the maintenance of multiple vehicle style, each keeps in repair producer and has to purchase multiple inspection diagnostic device.But these equipment price costliness scope of applications are very narrow, very are unfavorable for improving the technical economic benefit of maintenance producer.Its next subject matter is, the data that described inspection diagnostic device is contained is not comprehensive, and display screen is little, inconvenient operation, and be English display, and repair technician's actual educational level of incompatibility China great majority, thereby service efficiency is very low.
The purpose of this utility model is to avoid above-mentioned the deficiencies in the prior art part and proposes a kind of service item that can expand neatly as required is the Chinese display automobile fault finder of different automobile types style with adapting to multiple car.
The purpose of this utility model can realize by adopting following means: design and make a kind of Chinese display automobile fault finder, comprise that instrument body (main system) and car are interface arrangement.This interface arrangement one end connects the instrument body through connector.The other end is looked into the signal acquisition point of examining in the vehicle diagnosis seat by plug special or probe contact, or the flash signal of examining the vehicle failure lamp is looked in reception by the light sensation probe.Described vehicle failure finder comprises that also circuit structure is identical but the software of adorning adapts to 1～8 Cartridge (subsystem) that different cars are the different automobile types style, and they connect main control board on it by the bus interface devices on the instrument body.On the described instrument body Chinese display screen is arranged, and comprise bus control circuit, information acquisition pre-process circuit and data/address bus, data/command channel and control bus.Data/address bus connects main control board and bus interface devices, data/command channel connects main control board and information acquisition pre-process circuit, control bus is connecting bus control circuit and bus interface devices and bus control circuit and information acquisition pre-process circuit then, all is two-way control.
The drawing of accompanying drawing is described as follows:
Fig. 1 is the electric principle logic diagram of the utility model vehicle failure finder;
Fig. 2 is the electric principle logic diagram of main control board 10 in the described vehicle failure finder (Fig. 1);
Fig. 3 is the electric principle logic diagram of each Cartridge (subsystem) 6 in the described vehicle failure finder (Fig. 1);
Fig. 4 is that each car is the electrical schematic diagram of interface arrangement 3 in the described vehicle failure finder (Fig. 1), wherein
Fig. 4-1 is suitable for Mazda (MAZDA) car system,
Fig. 4-2 is suitable for Chrysler (CRYSLPR) and modern (HYUNDAL) car is;
Fig. 5 is to use the utility model vehicle failure finder to find the simple and clear process flow diagram and the synoptic diagram in kind of trouble location, failure judgement type;
Fig. 6 be the utility model from automobile+12 volts of power supplys obtain-10 and the DC voltage conversion circuit of-7 volts of power supplys;
Fig. 7 is the tree data model of each Cartridge 6 subsystem programs design in the utility model vehicle failure finder (Fig. 1);
Fig. 8 is the used software flow pattern of the utility model.
Be described in further detail below in conjunction with each most preferred embodiment shown in the accompanying drawing:
Chinese display automobile fault finder of the present utility model as shown in Figure 1, comprises that instrument body (main system) 1 and car are interface arrangement 3.These interface arrangement 3 one ends connect instrument body 1 through connector, see Fig. 5, and the other end is looked into the signal acquisition point of examining in the vehicle diagnosis seat by plug special or probe contact, or the flash signal of examining the vehicle failure lamp is looked in reception by the light sensation probe.Different cars are that the car of different automobile types style will be with different interface arrangement 3.Described vehicle failure finder comprises that also circuit structure is identical but the software of adorning adapts to 1～8 Cartridge (subsystem) 6 that different cars are the different automobile types style, the main control board 10 that they connect on it by the bus interface devices on the instrument body 1 13, and be that interface arrangement 3 is set up data transmission communication link with looking into to examine between the car by car again.When looking into the fault of examining certain vehicle style car, should use the corresponding software card 6 that this type car diagnostic trouble code and self-diagnostic program are housed.The LCD screen 11 that has Chinese to show on the described instrument body 1, and comprise bus control circuit 14, information acquisition pre-process circuit 15 and data/address bus n
2, data/command channel n
3With control bus n
4n
2Connect main control board 10 and bus interface devices 13, n
3Connect main control board 10 and information acquisition pre-process circuit 15, n
4Then connecting bus control circuit 14 and bus interface devices 13 and bus control circuit 14 and information acquisition pre-process circuit 15 all are two-way control.The simple and clear process flow diagram of Fig. 5 has clearly been showed the situation of being looked into that the failure message stream of examining car flows to the utility model finder and show its content on screen.
In fact the car that comprises of the utility model is that interface arrangement 3 has 15～25 more than.Communication link adopts programmed control, with a plurality of switching value signal controlling or patrol the slowdown monitoring switch scan method, realizes being looked into from quilt and examines the car associated components and read failure code and data information.Each Cartridge (subsystem) 6 includes diagnostic trouble code that the utility model finder moves necessary monitor supervisor and one or more cars system to be looked into and examines software, diagnostic trouble code analysis and related data, perhaps is exactly a relatively independent data bank subsystem.Described each subsystem 6 addressing range extension feature are that the former 16 bit address lines with single chip microcomputer 101 are divided into two groups, wherein one group is that low order address constitutes root segment, another group is by the high address, as A14, A15 and 8 position datawires through logic gates, for example PAL, GALP or Peel chip portfolio produce the multidigit high address, as A14～A18 and a plurality of storer chip selection signal.The car of each subsystem 6 is fault diagnosis and the program design of decoding software function module, has the tree data model, sees Fig. 7.
Main control board 10 is core components of instrument body 1, as shown in Figure 2, comprise single chip microcomputer 101, bus controller 102, random-access memory (ram) 103, bus interface 104, serial communication interface 105, display driver circuit 106, chain drum sweep circuit 107, information acquisition pre-process circuit 108 and bus 109.Described each functional unit 101～108 all connects with bus 109 with two-way channel, and 105 of serial communication interfaces are distinguished junctor highway interface 104, display driver circuit 106, keyboard scanning circuit 107 and information acquisition pre-process circuit 108 with one-way channel again.
Described keyboard scanning circuit 107 adopts matrix 5 * 4 forms, the I/0 passage P4 of slave microcomputer 101～P7 mouth input (alignment), and P0～P3 mouth 4 lines outputs (line) is again through being for conversion into the output of 6 lines.Its scanning process is carried out by the software in the microcomputer 101.
Serial communication interface 105 comprises reception, transmission and control assembly.Receiver receives serial input (containing clock), is transformed to 8 bit parallel bytes and outputs to microcomputer 101.Transmitter receives the 8 bit parallels inputs (containing clock) from microcomputer 101, provides serial output through conversion.Controller is carried out the order that microcomputer 101 sends, and exports with status information, control information.Described serial communication interface 105 is to be used for car looked into examining the result and outputing to printer prints or deposit computing machine in and set up user's archives that repair.
The utility model most preferred embodiment uses Motorola (MOTOROLA) series, 6803,6805 single chip microcomputers for example, and serial communication interface uses, for example RS244, RS232 circuit.Screen 11 on the instrument body 1 adopts liquid crystal display (LCD) module of 128 * 64 dot patterns, can show 4 row simultaneously, and 8 Chinese characters of every row, full screen can show 32 Chinese characters or 64 English characters and numeral.Display driver circuit 106 adopts the HD61202 integrated circuit, is contained on the main control board 10, and directly the bus with microcomputer 101 connects.Because LCD MODULE needs positive and negative two groups of power supplys, and vehicle failure look into examine on-the-spot often can only obtain the battery pack of automobile own+12 volts of power supplys, therefore, the utility model most preferred embodiment uses a NE555P integrated circuit, obtain sawtooth wave from+12 volts of power supplys, after the capacitive coupling rectification, obtain negative supply, see Fig. 6.
On Fig. 2 108 is information acquisition passage and pre-process circuit, comprises integrated circuit such as combinational logic (logic gate array) and latch GAL18CV8,74HCT257,4069IC and some transistors, resistance, electric capacity.Examined car system under the car according to looking into, dispatch from the factory the title of an emperor's reign, require to look into the parts of examining such as engine, wheel box, anti-stop locking, air bag etc., under preset sequence control, switch scanning when producing 8 switching value controls of passway and patrolling survey by described combinational logic circuit, finish with being looked into the foundation of examining car related port data link, realize acquisition operations automobile fault information, data information.
Described instrument body 1 is provided with bus interface devices 13, is a kind of porous pin type socket or slot type reed socket, for example 24/28 double-row type socket.Various cars are that diagnostic trouble code diagnostic routine and various data information all can reduce independent subsystem, become Cartridge 6.Connect mutually with main control board 10 by socket or slot 13 during use, carry out required feature operation.So the advantage of way is.Be convenient to main system 1 diagnostic function expansion, can use microcomputer 101 limited memory capacity and addressing space effectively.
The utility model fault finder has a plurality of subsystems (Cartridge) 6, and their hardware configurations are the same, as shown in Figure 3, includes programmable read-only memory (PROM) (EPROM) 61～64 and (E
2PROM) 65, comprise bus interface 66, address latch 67, register 68,69, and logic gate array (GAP/PAL) 70,71.Each functional unit 61～67 is all with channel link address/data (A/D), address (A) and control (C) three buses, after bus interface 66 connects instrument body (main system) 1.The software document that adapts to different cars and be the different automobile types style is stored in respectively in the respective memory 61～64 and 65 of different software card 6, and they are exclusive separately diagnostic trouble code explanation, diagnostic trouble code analysis and related datas.Most preferred embodiment of the present utility model has the deficiency that 16 bit address lines and addressing range only reach 64XB in order to remedy 101 of used 8 microcomputers, manages to expand this addressing range to 1～2MB and takes following measure:
In the Cartridge (subsystem) 6, each storer 61～64 and address bus A0～A18 of 65 go by the microcomputer 101 that three buses are connected to main control board 10 like this: with the former 16 bit address line A0～A15 separated into two parts of microcomputer 101, wherein A0～the A7 of each storer 61～65 is parallel with one another after address latch 67 is connected to address/data (A/D) bus, A8～the A13 of each storer directly is connected to address (A) bus separately, constitute the root segment address of A0～A13, addressing range 16KB.Data line D0～the D7 of each storer is connected to the A/D bus separately, and makes up through logic gate array 70 together with address wire A14, A15, produces high address line A14～A18, is A0～A18 thereby make selected memory chip address, memory capacity 512KB.In addition, the same D0～D7 of A14, A15 produces a plurality of storer chip selection signals through logic gate array 71 combinations, is CE1～CE5 in most preferred embodiment of the present utility model, is connected to each storer (61)～(65) respectively.So, physical addressing range expansion to the 5 * 512KB of used 8 microcomputers 101 of the utility model, i.e. 2.5MB.In described embodiment, the enforcement expression formula of logic gate array can select row one or two as follows:
A14＝D
0·A
150· A
140
CE4=D
4+ D
5+ D
6+ D
3+ D
2+ D
1+ D
0+ A
130+ A
140+ A
150A in the+OE formula
150, A
140, A
130Be the address wire of 8 microcomputer outputs, the A14 on the expression formula left side then is the effective address line that produces through the logic gate array conversion.
The used car of the utility model fault finder is that interface arrangement 3 is prior art products, and different cars are to need with different interface arrangements.These devices usually also comprise analog/digital (A/D) converter, two/ten (B/D) system converter and dc-dc converter etc. except that comprising Electric plug with shutter or light sensation probe.Fig. 4-1 shows that being suitable for Japanese car is the interface arrangement electrical schematic diagram of Mazda trade mark car, and wherein XT will be linked to be looked into the information acquisition Interface Terminal of examining car.W is 8 core cables, is connected to instrument body 1 of the present utility model.N1 is a dc-dc converter, makes 13 pin and 9 pin connect when diode V0 ends, and 4 pin and 6 pin are connected, and are examined the corresponding contact Information Monitoring of car by Interface Terminal XT from looking into.If diode V0 anode voltage is higher than negative electrode and conducting, then dc-dc converter N1 makes 13 pin be connected with 11 pin, and 4 pin are connected with 8 pin, is examined car and gathers another road information from looking into.XS1 and XS2 are two 8 pin interface sockets, are used for conversion Interface Terminal XT with the annexation of 8 core cable W, thereby the quilt of applicable 3 two kinds of trades mark is looked into and examined car.Fig. 4-2 shows the interface arrangement electrical schematic diagram that is suitable for U.S.'s Chrysler and Hyundai (HYUNDAL) car system.The connotation of XT and W same Fig. 4-1 wherein.+ 12 volts of power supplys obtain from being looked into the cigarette lighter socket of examining car through plug XP, through diode V21, through resistance R 2 and capacitor C 3 filtering, provide each transistorized collector voltage again.N2 is a two four-way analog switch, model IC4052.Each transistor V7, V8 form a passage of Information Monitoring, from line 3 inputs (serial port 1) of 8 core cable W, are subjected to 2 pin and the 15 pin signal controlling of N2 simultaneously; V4 is from the line 7 of W, and V3 is from line 5 input signals of W, and the amplification back is provided to the B line by V2, the load of V1 common collector is looked into the control command of examining car; Line 5 and line 7 by W add to two four-way switch N2 simultaneously with control signal, input variable as its selection, V10, V12 form another passage of Information Monitoring, line 6 input instrument bodies 1 of the present utility model (serial port 2) from W, be subjected to line 5 and line 7 signal controlling of W, from four-way, select one tunnel input; V5, V6 form control signal output, are subjected to line 5 and line 7 signal controlling of W, select one tunnel output from four-way.
Fig. 6 is the miniwatt DC transfer circuit from-10 volts of+12 volts of power supplys acquisitions and-7 volts of voltages, is prior art.With an integrated circuit N3, model NE555P, and two diodes, stabilivolt, some resistance capacitances.N3 exports sawtooth wave, and through capacitor C 30 couplings, diode rectification is exported after stabilivolt V30 voltage stabilizing again.
Fig. 7 and Fig. 8 are respectively the tree data model and the software flow patterns of the present utility model of each subsystem 6 program design, and its connotation comes into plain view from drawing, no longer superfluous herein chatting.
The use of the utility model fault finder is carried out as follows:
1. examined under the car car system and select Cartridge 6 according to looking into, insert in the special-purpose jack of finder;
2. the attaching plug of finder is inserted in the cigarette lighter socket on the car, or directly use the power supply anchor clamps to clip on the storage battery electrodes of car;
3. main system 1 is devoted oneself to work, and main control board 10 carries out initialization, after the self-check program operation, sets up keyboard/display operation service under monitor supervision.The user is according to Chinese function menu options on the display screen 11 and prompting symbol, and car is maker's name, engine identification number, the required title of looking into the system of examining under key entry car on the keyboard, can enter actual inspection, measurement and diagnostic operation.
The utility model fault finder can be used for looking into the car of examining and comprises:
1. Asia car system: Lexus, Mazda, Isuzu Motors, Nissan, Toyota, Suzuki, Honda, send out greatly, modern, big word, imperial crown etc.;
2. U.S. vehicle system: the various vehicle styles of general, Ford, Chrysler three major companies;
3. European car is: benz, BMW, rich and powerful people, Audi;
4. domestic car: popular (Santana), Audi, Xiali, five ribs (big sending out) etc.
Compare with prior art, the utility model fault is looked into the outstanding advantage of examining view and is, the car fault that can adapt to multiple car and be the different automobile types style is looked into and examined, Chinese shows on the screen, and easy and simple to handle, easily-learned easily mastered, small volume and less weight is adapted at automobile inspection scene and workshop and uses on the spot.
The title of the used components and parts of the utility model vehicle failure finder, model is listed below: drawing reference numeral title model, manufacturer's 101 single chip microcomputers 6803,6805, MOTOROLA105 serial communication interface RS244, RS232 drawing reference numeral title model, manufacturer's 106 display driver circuit HD61202103 random-access memory (ram)s 66264, NEC61～64 programmable read-only memory (PROMies (EPROM) 27020/28020, NEC, Intel65 programmable read-only memory (PROM) (E
2PROM) 28C64, NEC, Intel68,69 registers (RAM) 6264, NEC, Intel70,71 logic gate array AM116V8XS1, XS2 8 pin interface socket V0 crystal diode 1N913V1～V12 transistor 2N4401V21, the two four-way analog switch IC4052 of V22 crystal diode N1 dc-dc converter 1413K5N2, ST, Texas, TomsonN3 saw-toothed wave generator NE555P, Texas, NEC
Claims (4)
1. a Chinese display automobile fault finder comprises that instrument body (main system) (1) and car are interface arrangement (3); These interface arrangement (3) one ends connect instrument body (1) through connector, and the other end is looked into the signal acquisition point of examining in the vehicle diagnosis seat by plug special or probe contact, or the flash signal of examining the vehicle failure lamp is looked in reception by the light sensation probe; It is characterized in that:
Described vehicle failure finder comprises that also circuit structure is identical but the software of adorning adapts to 1～8 Cartridge (subsystem) (6) that different cars are the different automobile types style, and they connect main control board (10) on it by the bus interface devices (13) on the instrument body (1); Chinese display screen (11) is arranged on the described instrument body (1), and comprise bus control circuit (14), information acquisition pre-process circuit (15) and data/address bus l
2, data/command channel l
3With control bus l
4l
2Connect main control board (10) and bus interface devices (13), l
3Connect main control board (10) and information acquisition pre-process circuit (15), 1
4Then connecting bus control circuit (14) and bus interface devices (13) and bus control circuit (14) and information acquisition pre-process circuit (15) all are two-way control.
2. according to the described Chinese display automobile fault finder of claim 1, it is characterized in that: described main control board (10) comprises single chip microcomputer (101), bus controller (102), random-access memory (ram) (103), bus interface (104), serial communication interface (105), display driver circuit (106), keyboard scanning circuit (107), information acquisition pre-process circuit (108) and bus (109); Described each functional unit (101)～(108) all connect with the same bus of two-way channel (109), and serial communication interface (105) is then again with one-way channel difference junctor highway interface (104), display driver circuit (106), keyboard scanning circuit (107) and information acquisition pre-process circuit (108).
3. according to the described Chinese display automobile fault finder of claim 1, it is characterized in that: described Cartridge (subsystem) (6) comprises ROM (read-only memory) (EPROM) (61)～(64) and (E
2PROM) (65) comprise bus interface (66), address latch (67), register (68) (69), and logic gate array (GAL/PAL) (70) (71); Described each functional unit (61)～(71) are all with channel link address/data (A/D), address (A) and control (C) three buses, after bus interface (66) connects instrument body (main system) (1); The software document that adapts to different cars and be the different automobile types style is stored in respectively in respective memory (61)～(64) and (65) of different software card (6).
4. according to the described Chinese display automobile fault finder of claim 3, it is characterized in that: in the described Cartridge (subsystem) (6), address wire A0～the A18 of each storer (61)～(64) and (65) goes by the microcomputer (101) that three buses are connected to main control board (10) like this: the A0 of each storer (61)～(65)～A7 line is parallel with one another after address latch (67) is connected to address/data (A/D) bus, A8～the A13 of each storer then directly is connected to address (A) bus separately, constitutes the root segment address of A0～A13; Data line D0～the D7 of each storer is connected to the A/D bus separately, and makes up through logic gate array (70) together with address wire A14, A15, produces high address line A14～A18, is A0～A18 thereby make selected memory chip address wire; In addition, the same D0～D7 of A14, A15 produces a plurality of memory chips and selects signal wire CE1～CE5 through logic gate array (71) combination, is connected to each storer (61)～(65) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96212355 CN2247806Y (en) | 1996-06-10 | 1996-06-10 | Chinese character display automotive fault finder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96212355 CN2247806Y (en) | 1996-06-10 | 1996-06-10 | Chinese character display automotive fault finder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2247806Y true CN2247806Y (en) | 1997-02-19 |
Family
ID=33895056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96212355 Expired - Lifetime CN2247806Y (en) | 1996-06-10 | 1996-06-10 | Chinese character display automotive fault finder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2247806Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7750795B2 (en) | 2004-12-14 | 2010-07-06 | Denso Corporation | In-vehicle system, detailed warning lamp information notification system, and server system |
| CN102637006A (en) * | 2012-04-24 | 2012-08-15 | 苏州大学 | Method and device for real-time acquisition of working state of electronic equipment |
| CN108729490A (en) * | 2018-06-07 | 2018-11-02 | 徐州徐工挖掘机械有限公司 | A method of being suitable for excavator fault diagnosis and CAN bus is sent |
| CN112415912A (en) * | 2020-10-29 | 2021-02-26 | 广西玉柴机器股份有限公司 | Engine electric control signal simulation system and method |
-
1996
- 1996-06-10 CN CN 96212355 patent/CN2247806Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7750795B2 (en) | 2004-12-14 | 2010-07-06 | Denso Corporation | In-vehicle system, detailed warning lamp information notification system, and server system |
| CN101084532B (en) * | 2004-12-14 | 2010-11-03 | 株式会社电装 | In-vehicle system, system for notifying detail information on warning light, and server system |
| CN102637006A (en) * | 2012-04-24 | 2012-08-15 | 苏州大学 | Method and device for real-time acquisition of working state of electronic equipment |
| CN108729490A (en) * | 2018-06-07 | 2018-11-02 | 徐州徐工挖掘机械有限公司 | A method of being suitable for excavator fault diagnosis and CAN bus is sent |
| CN108729490B (en) * | 2018-06-07 | 2020-09-08 | 徐州徐工挖掘机械有限公司 | Method suitable for fault diagnosis and CAN bus transmission of excavator |
| CN112415912A (en) * | 2020-10-29 | 2021-02-26 | 广西玉柴机器股份有限公司 | Engine electric control signal simulation system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |