Aftertreatment SCR System Dosing - Test
通过以下 Cat® 电子技师 (ET) 菜单访问测试:
- 诊断
- 诊断测试
此测试用于帮助喷射泵的故障诊断与排除。 使用此测试确认喷射泵的操作是否正确。
- 从喷射机柜的 DEF 出口处拆下柴油机排气处理液(DEF)压力管路。
- 将来自 464-1955 工具总成的 DEF 管路安装到喷射控制机柜的出口上。
- 将 DEF 管路引入包括在 464-1955 工具总成中的容器内。
- 执行"后处理 SCR 系统喷射测试"。
泵将以预定速度运转。 经过一段预定时间后,泵将自动切断。
- 测量输送到容器中的 DEF 量。
正确的输送量为
2000 ± 200 mL (68 ± 6.8 oz) 。注: 执行此测试时,测试软管可额外包含多达
140 mL (4.76 oz) 的液体。 如果此液体排放到测试容器中,DEF 总量将为2145 ± 200 mL (73 ± 6.8 oz) 。
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