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介绍流程 :• 江铃 R425DOHC 发动机基本情况介绍• 江铃 R425DOHC 装配工艺• 江铃 R425DOHC 常见故障及维修• 江铃 R425DOHC 电控系统概述

江铃 R425DOHC 柴油机基本情况介绍

Basic Introduction of jiangling R425DOHC Engine

R425 DOHC EngineBasic Engine Data 发动机基础参数

– Configuration 形式 In-Line 4– Displacement 排量 2499 cc– Bore × Stroke 缸径 × 行程 92mm x 94 mm– Max power @4000 rpm 105 kW (143 HP)±5 ％ 最大功率 / 4000 rpm– Max Peak Torque @ 2000 rpm) 340 Nm±5 ％ 最大扭矩 / 2000 rpm– Combustion System 燃烧系统 Direct Injection 直接喷射– Compression Ratio 压缩比 17.5 : 1– Specific power 升功率 42KW/liter – Min BSFC 最小燃油消耗率 205g/KWh – Air Induction Turbocharged / intercooler 进气方式 增压 / 中冷– Block 气缸体 Cast Iron 铸铁– Cylinder Head One piece, in aluminium 气缸盖 整体式，铝缸盖– Emission Devices Catalytic converter, Cooled EGR 排放装置 催化转换器，中冷 EGR– Emissions 尾气排放水平 EU. 3 （具备 EU4 能力）– Injection System Electronically Controlled Common Rail, 燃油喷射系统 电控共轨– Valve Train Dual Overhead Camshaft, 4 Valves / Cylinder (DOHC) 气门机构 双顶置凸轮轴， 4 气门 / 气缸

Dimensions （ Base Engine) 结构尺寸（基础发动机）– Length 长 710 mm – Width 宽 630 mm– Height 高 765mm– Weight (dry) 重量（净重） 220 kg

VM R425 DOHC 柴油机总成外形尺寸VM R425 DOHC Diesel Engine Assy. Dimensions

Right view右视

Front view

前视Back view

后视

710

765

630

性能卓越的高速直喷柴油机 State-of-the-Art HSDI Engine

• 噪声低 Low noise • 比功率高 High power

– R425 DOHC 柴油机进行增压中冷，比功率为 42kW/L ，在柴油机中处于领先水平。

R425 DOHC is TCI Diesel Engine, The power is 42kW/L.

• 大扭矩 High Torque– 外特性最大扭矩为 340N·m, 有利于整车的加速性及操

纵性。 The peak torque is 340Nm, satisfied with the vehicle’s ac

celeration and the drive ability is perfect• 低油耗

– 外特性最低油耗实测 230g/(kW·h) ，最低工况点油耗 195 g/KW.H ，具有优秀的经济性 .

The min. fuel consumption is 230g/(kWh) in the Full Throttle Performance test. Min. fuel consumption is 195g/(kW·h), with high economy

• 低排放 Low Emission– 达到欧三排放并具备欧四能力 Euro capabilityⅣ

R425DOHC

Specifications

and

Technical Data

说明书和技术参数

R 425DOHC

• Cast iron crankcase and wet liners 铸铁湿式缸套

• Aluminum crankshaft supports 铝制轴承座

• Aluminum cylinder head 铝制缸盖

• Gallery cooled pistons 内冷式活塞

• 4 valves per cylinder with double overhead camshaft 4 气门双顶置凸轮轴

• Finger follower actuated valves with hydraulic adjusters

• Central vertical injector position 喷油器中央垂直布置

• Common rail injection system 共轨喷射系统

• Belt-driven camshaft and injection pump 皮带传动凸轮轴及喷油泵

• Gear train for oil pump, vacuum pump and balance shaft 齿轮传动油泵、真空泵、平衡轴

• Balance shafts (available) 平衡轴（可选）

• Cooled EGR 中冷 EGR

R 425DOHC

DCharacteristics 性能指标

Engine rpm range: 发动机转速范围 750 – 4800 rpm

Oil consumption: 机油耗 0. 22 g/kWhr

Fuel consumption: 燃油耗 215 g/kWhr @ peak torque

256 g/kWhr @ max.

power

Blow-by: 漏气量 40 L/1’ @ max. power

Cold startability: 低温启动性能 5 sec. @ -20°C (10W oil)

6 sec. @ -25°C (0W/5W

oil)

R 425DOHC

Fuel Injection System 燃油喷射系统

• Bosch Common Rail 1350 bar Max. Pressure

Bosch 共规喷射系统，最大喷射压力为 1350 bar.

• ECU: EDC 16

电控单元： EDC 16

• Low Pressure Pump: not needed

低压泵：不需要

Components 部件

R425DOHCCylinder Head 气缸盖

R425DOHCCylinder Head + Valves 气缸盖 + 气门组

R425DOHCCylinder Head + Vertical Injectors

R425DOHCCylinder Head + Valve Train

R425DOHCValve Train 气门传动机构

R425DOHCPorts 气道

R425DOHCHead Cover 气缸盖罩

R425DOHCIntake Manifold 进气歧管

R425DOHCInjection System 喷射系统

R425DOHC

Block 气缸体

R425DOHC

Block 气缸体

R425DOHCCrankshaft and Con. Rod Assy

R425DOHCBalance Shaft Drive 平衡轴传动

R425DOHCTiming Drive 正时传

动

R425DOHCBelt Cover 皮带罩壳

R425DOHCExploded View 分解视

图

Transparent View 透视图

Partial Assembly 部装图

Crankshaft 曲轴

Crankshaft 曲轴

Crankshaft 曲轴

EGR Layout EGR 布局图

谢 谢Thank you