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發動機試驗臺架使用操作流程

關注:58 發表時間:2019-05-11 13:13:39

01

WD615發動機實現的功能

Achievable functions of WD615 engine

■ 實現的功能:

水溫、進氣壓力、轉速、電瓶電壓的數值是否正常,

是否有故障,會出現的故障及原因分析。

test whether the oil pressure, water temperature,

voltage are normal, and whether the engine is

the engine has fault or not, possible fault and

02

技術要求

Technical requirements

■ 主要技術參數:

Length *width *height of test bench:

② 機油壓力表數值:0-1.0Mpa

③ 水溫表數值:0-120°C

④ 進氣壓力表數值:0-0.1Mpa

⑤ 轉速表數值:0-3000rpm

⑥ 電瓶電壓數值:0-32V

03

發動機試制前操作流程

Engine before trial-manufacture operation process

■ 用龍門吊架將發動機吊起,把前后支撐板用螺栓

Lift the engine with a gantry hanger and connect

試驗臺的懸置支撐架;

the engine to the test bench suspended

By adjusting the screw height of the

To align the center of the engine fan to the center

Engine fan to the test bench front-end

外六角螺栓  配平墊連接;

hexagon bolts with flat gasket connection;

■ 后支撐連接螺栓:2只M14*1.5*30

Front support connecting bolt: 2 M14*1.5*30

hexagon bolts with flat gasket and spring washer.

■ 水箱的進出接口和中冷器進出接口通過硅膠管

The inlet and outlet interface of the water tank

are connected to the engine respectively through

確保發動機點火后能夠正常運轉,無泄漏現象;

connection is checked to ensure that the engine

Connecting warm air joint:

一根接水箱小循環接頭,另一根接暖風接頭處;

主要用于加注防凍液,用卡箍固定牢靠;

flexible conduits,

of the water tank,

a high pressure pipe φ22mm is connected

which is mainly used for filling the antifreeze;

確保發動機點火后能夠正常運轉,無泄漏現象;

the pipeline connection is checked to ensure

after ignition without leakage.

■ 連接發動機空濾到試驗臺的空濾總成;

assembly of the test bench.

■ 渦輪增壓口排氣端到試驗臺的排氣管,

Connect the exhaust end of the turbocharged

and fix firmly with a clamp.

■ 連接手拉油門支架和熄火缸;

and flameout cylinder.

■ 連接柴油管線,進、回油管;

■ 連接電瓶線到電瓶開關和起動機;

and starter.

■ 連接檢測用的傳感器等其它管線線束,

Connect other pipeline harness,

and hold it firmly in position.

水溫傳感器及線束

機油壓力線束及接頭

檢查管線的連接,確保連接牢靠、無誤。

control panel to the bracket and flameout cylinder;

that the connection is reliable and correct.

Turn on the ignition key switch,

By controlling the hand-held throttle,

of the engine can be realized.

■ 分別讀取控制臺上的儀表數值,

可讀取的數值機油壓力、水溫、進氣壓力、

Read the meter value on the control panel,

on the vehicle: Test engine operation, readable

pressure, engine rotational speed and battery

Rotational speed 600rpm:

Rotational speed 1,000rpm:

進氣壓力0.01mpa。

oil pressure 0.6mpa,

進氣壓力0.02mpa。

oil pressure 0.65mpa,

After the engine has been running for 30 minutes,

將發動機吊裝下來,發動機測試完畢。

turn off the ignition key,

lift the engine down,

05

原理故障表

Principle fault list

A. 在點火后通過控制臺上的儀表數值的大小,

Determine whether the tested engine is running

value on the control panel after ignition.

B. 故障分析:

Reason of rough idling

Intake system

第一個原因是進氣系統,進氣管以及各種閥門的泄漏。

會造成混合器過濃、過稀,使發動機燃燒不正常。

The first reason is the leakage of the intake system,

Air enters from the intake pipe and exhaust gas

to be too dense and too thin, causing the engine

the throttle and air inlet. Misalignment of

Fuel system

若大泵有滴漏或堵塞現象,使其無法過油,

導致發動機怠速不穩。燃油壓力故障。油壓過低,

實際噴油量增加,使混合氣過濃。噴油量失準。

blocking phenomenon, it cannot filter the oil,

which makes individual cylinders work poorly and

Fuel pressure fault. When the oil pressure is too

decrease of fuel-injection quantity; When the oil

quantity increases, which causes too thick mixture.

③ 機械機構。

下降過多,從而使功率不平衡。

造成氣門密封不嚴。

它有故障也會使壓縮壓力不一致。

the failure of valve actuating mechanism

decrease too much and the power is unbalanced.

have too much carbon deposit, causing valve seal

piston-connecting rod mechanism,

pressure to be inconsistent with faults.

Exhaust system blocking

與三元催化器內因部因結膠、積炭、破碎等原因

使進氣管真空度過低,造成發動機排氣不徹底、

進氣不順暢可能造成電腦記憶空氣流量計故障代碼。

惡劣條件下工作,加速了氧傳感器的損壞,

When the three-way catalyst causes local or

deposition and fragmentation, it will increase

pipe vacuum too low, and cause the engine exhaust

sufficient. As a result, the working performance of

Air intake problems may also cause computer

ruled out for a long time, it will make the oxygen

accelerate the damage of the oxygen sensor, and

Reason of high-water temperature

① 水箱缺水。

冷卻液消耗的比較慢,但是也有消耗,

水箱長時間缺水,導致水溫高。

the coolant consumption in the water tank is slow,

check the coolant, the water tank is short of water

Thermostat fault

有些車主開車沒走幾公里就發現水溫升高,

像這種故障可能是節溫器打不開,

Some car owners find that the water temperature

no leak in the water pipe. This kind of fault may

cooling system cannot carry on a general

Water pipe leakage

開車過程中發現汽車有漏水的地方,

這種情況相對來說容易發現,

In the course of driving, if finding out where

pipe aging and breakage. It is easy to find it,

pipe at the maintenance shop.

④ 水箱散熱不良。

長時間使用水做媒體會導致發動機及水箱內產生水銹,

想要解決這種辦法是把水銹先排除,

Some car owners directly use water as coolant.

to water rust in the engine and water tank, the

high water temperature. Solving this problem is

the water tank.

⑤ 水泵故障。

大多數是葉片式的,長時間泵水后葉片會打磨掉,

The water pump is the core part of cooling system

car are blade-type. After working for a long time,

the water system does not circulate and the water

Cylinder mattress is deformed

有些車主反應汽車水溫高,但在實際用車過程中

消耗的比較快,這種情況是發動機缸床墊變形或

所以會出現汽車行駛一段時間后水箱缺水,水溫高。

temperature of the car, but actually there was

a small amount of cooling water enters into the

engine cylinder mattress. In this situation, the

so there will be a water shortage in the water

and the water temperature is high.

⑦ 電子扇故障。

如果電子扇不工作熱量散不掉,汽車水溫肯定會升高。

the rotation of the electronic fan. If the electric fan

definitely rise.

⑧ 傳感器故障。

如果水溫傳感器有故障,沒有信號啟動散熱風扇,

The water temperature sensor on the car controls

If the water temperature sensor is faulty and there

temperature will be rose.

⑨ 線束故障。

如果線路有故障也會間接導致水溫高。

of the whole car. If the line is faulty,

Reason for low voltage:

① 第一種導致汽車電瓶電壓過低情況的發生的原因

溫度、物質不純的原因,電瓶往往會發生自放電,

如果汽車長期的閑置不用,就容易導致電瓶放電過度,

The long-term idle car is the first reason to cause

internal structure, specific gravity, temperature

battery will often self-discharge, and will usually

If the car is not used for a long time, it will easily

to continue charging.

② 現如今,普通的汽車電瓶一般都采用的貧液式設計,

會逐漸形成白色硫酸鉛化,在汽車電瓶內部極板嚴重

是無法恢復其容量的。

designed as lean liquid type. The moisture in the

lead sulfate will be gradually formed. After the

sulfated, recharging the battery cannot restore

將電能儲存成化學能儲存,在需要使用放電的時候,

也是有壽命限制的,一般的電瓶本身壽命基本也只是

就會出現電壓過低的情況了。

chemical reaction, its main principle is to store

When the discharge is required, the chemical

Therefore, the battery has a service life limit due

battery is basically only 300 times of charging

almost the same, the voltage will be too low.

4. 機油壓力高的原因:

Oil viscosity is too large

機油粘度的大小表明了機油流動時的內摩擦阻力大小。

機油粘度大;反之,發動機溫度高時,機油粘度小。

如果機油粘度超過規定值,機油在潤滑系統內流動

本身粘度大(因對機油牌號選用不當,即機油牌號

機油壓力會高。

friction resistance when the oil flows. The oil

When the engine temperature is low, the viscosity

temperature is high, the oil viscosity is small. When

leakproof is good, and the leakage amount is small.

the flow resistance of the oil in the lubrication

will be increased. This shows that the engine

the oil pressure will be high. Because the oil grade

suitable for the ambient temperature. For example,

in winter.

② 壓力潤滑部位間隙過小或機油細濾器堵塞潤滑油路。

or the oil fine filter block the lubricating oil to flow.

潤滑系機油循環回路的流動阻力等于并聯支路機油

連桿軸頸、曲軸軸頸、搖臂軸等,這些潤滑部位

回路堵塞,以及限壓閥調整壓力過高等,

It shows that the flow resistance of the lubricating

reciprocal of the parallel branch oil flow resistance.

the connecting rod journal, the crankshaft journal

part is too small and the filter element of the fine

the pressure of the pressure limiting valve is

lubricating oil circuit will be increased and the

The pressure of the pressure limiting

和球閥來限制機油壓力的,并使之機油壓力不超過

便克服彈簧的彈力將閥門推開向系統內泄壓,

從而將壓力限制在規定的范圍內。潤滑系的機油壓力

會使系統內的機油壓力過高。

of the pressure limiting valve, the pressure limiting

to limit the oil pressure, and the oil pressure does

documents. When the oil pressure exceeds the

spring by the spring force of spring to relieve

lower than the spring force, the valve is closed with

the specified range. From this point of view,

on the spring force of the spring. If the adjusted

system will be too large.

④ 機油濾清器堵塞。

上的安全閥就被頂開,機油便不經過濾而直接

當濾清器被堵塞時就不能及時頂開,機油泵壓力升高,

引起油壓的下降。應經常保持機油濾清器的清潔;

及時更換安全閥的彈簧或研磨鋼珠與閥座的配合面,

When the oil filter is clogged and the oil cannot be

is opened and the oil will directly flow into the main

pressure of the safety valve is too large, it cannot

Therefore,if the pressure of the oil pump is

and the oil supply to the main oil passage is

pressure. It should be always kept the oil filter

safety valve correctly (it is generally 0.35-0.45Mpa);

surface of the grinding steel ball with the valve seat

Reasons for low intake pressure

① 空氣需求量大于供給量。

有漏氣現象,減少用氣量。

or not, if there is air leakage on the system or not,

Oil and gas separator is blocked

由于油路系統中或多或少存在某些雜質,

通過濾芯的阻力增加,影響機組的正常工作。

Due to more or less impurities in the oil system,

for a period of time, which will increase the

element and affect the normal operation.

element in time according tothe signal displayed

Air filter is clogged

空氣濾清器的作用是將吸入的空氣加以過濾,

如果空氣過濾器濾芯堵塞嚴重將影響到

The air filter is to filter the inhaled air to ensure

clean. If the air filter element is clogged, it will

Therefore, it is necessary to replace its filter

Pressure regulator is malfunctioned or damaged

壓力調節系統的功能是根據客戶用氣量的大小,

所以要對損壞的壓力調節器及時更換,

The pressure regulation system is to automatically

gas used by the customer in order to achieve a

it is necessary to replace the damaged pressure

pressure regulator in time.

⑤ 進氣閥不能完全打開。

進氣閥處于全開狀態。當用戶所需用氣量減小時,

使進氣閥開度減小,從而減少壓縮機的進氣量,

The intake valve is to control the amount of intake

the intake valve is fully open. When the amount of

air volume adjusting will input compressed air to

the intake valve, which will reduce the intake air

failure will affect the load on the unit.

⑥ 控制管路漏氣。

全部打開以至于機組負荷無法帶滿。

will prevent the intake valve from opening

fully loaded.


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