Internal combustion engine system and method for controlling the same
    81.
    发明授权
    Internal combustion engine system and method for controlling the same 有权
    内燃机系统及其控制方法

    公开(公告)号:US07032580B2

    公开(公告)日:2006-04-25

    申请号:US11111765

    申请日:2005-04-22

    申请人: Naoto Suzuki

    发明人: Naoto Suzuki

    IPC分类号: F02M33/04

    摘要: When fuel vapor flows to an intake passage from a canister, the amount of fuel injected to an internal combustion engine is corrected to suppress fluctuation of the air-fuel ratio in the engine due to the fuel vapor. An EGR mechanism variably sets the EGR rate. When the pressure in a fuel tank is greater than or equal to a predetermined value, a tank sealing system releases gas containing fuel vapor from the fuel tank to the canister on condition that fuel vapor is flowing to the intake passage from the canister. A controller controls the EGR mechanism to reduce the EGR rate when gas is released from the fuel tank to the canister. Therefore, combustion is stabilized even if EGR is executed when gas in the fuel tank is released.

    摘要翻译: 当燃料蒸汽从罐流向进气通道时,对内燃机喷射的燃料量进行校正,以抑制由于燃料蒸汽引起的发动机空燃比的波动。 EGR机构可变地设定EGR率。 当燃料箱中的压力大于或等于预定值时,储罐密封系统在燃料蒸气从罐流入进气通道的条件下,将含有燃料蒸汽的气体从燃料箱释放到罐中。 当气体从燃料箱释放到罐时,控制器控制EGR机构以降低EGR率。 因此,即使在燃料箱中的气体被释放时执行EGR,也能够使燃烧稳定。

    Method and a device for purifying combustion exhaust gas
    89.
    发明授权
    Method and a device for purifying combustion exhaust gas 失效
    燃烧废气净化方法和装置

    公开(公告)号:US5778667A

    公开(公告)日:1998-07-14

    申请号:US876608

    申请日:1997-06-16

    摘要: In the present invention, the No. 1 cylinder of an engine is connected to a first exhaust passage and the No. 2 to No. 4 cylinders are connected to a second exhaust passage. A three-way catalyst and a NO.sub.X absorbent are disposed in the first and second exhaust passage, respectively. A denitrating catalyst is disposed in a common exhaust passage to which the first and second exhaust passage merge. The NO.sub.X absorbent absorbs NO.sub.X when the No. 2 to No. 4 cylinders are operated at a lean air-fuel ratio, and is regenerated, i.e., releases and reduces the absorbed NO.sub.X when the No. 2 to No. 4 cylinders are operated at a rich air-fuel ratio. However, NO.sub.X, without being reduced, is released from the NO.sub.X absorbent during a short period at the beginning of the regenerating operation. In the present invention, the No. 1 cylinder is operated at a rich air-fuel ratio during the short period at the beginning of the regenerating operation in order to produce NH.sub.3 at the three-way catalyst. Therefore, when NO.sub.X without being reduced is released from the NO.sub.X absorbent and flows into the denitrating catalyst on the common exhaust passage, NH.sub.3 produced at the three-way catalyst is also supplied to the denitrating catalyst. Thus, NO.sub.X released from the NO.sub.X absorbent at the beginning of the regenerating operation is reduced at the denitrating catalyst by NH.sub.3 produced at the three-way catalyst.

    摘要翻译: 在本发明中,发动机的1号缸与第一排气通路连接,第2〜4缸与第2排气通路连接。 分别在第一和第二排气通道中设置三元催化剂和NOX吸收剂。 脱气催化剂设置在第一和第二排气通道合流的公共排气通道中。 当2号至4号气缸以稀薄的空燃比运行时,NOX吸收剂吸收NOX,并且再生时,即当第2号至第4号气缸运行时释放并减少吸收的NOX 丰富的空燃比。 然而,在再生操作开始时的短时间内,NOX不被还原,从NOX吸收剂中释放出来。 在本发明中,为了在三元催化剂下生成NH 3,在再生运转开始的短时间内,1号气缸以浓空燃比运转。 因此,当没有还原的NO x从NOX吸收剂中释放并流入共用排气通道的脱硝催化剂时,在三元催化剂上生成的NH 3也被供给到脱硝催化剂。 因此,在再生操作开始时从NOX吸收剂释放的NOX在脱氮催化剂下通过在三元催化剂下产生的NH 3而降低。