公开(公告)号：US3837165A

公开(公告)日：1974-09-24

申请号：US28700972

申请日：1972-09-07

Applicant: SNAM PROGETTI

Inventor： ARRIGONI V ,  ZANONI G ,  GAETANI B ,  MARCHESI G

IPC: F16K31/06 ,  F01N3/08 ,  F01N3/20 ,  F02D41/14 ,  F02B75/10

CPC classification number: F02D41/1446 ,  F01N3/2053 ,  F01N2390/02 ,  F01N2410/02 ,  F01N2410/10

Abstract: A device for automatically controlling a by-pass electro-valve of a catalytic muffler comprising three inlet stages, the first inlet stage is responsive to the speed or number of engine revolutions, the second inlet stage is responsive to the throttle position and includes a retarding circuit and store, and the third inlet stage is responsive to the temperature of the catalyst and includes means for comparing the temperature of the catalyst with a maximum allowable temperature (TMAX.) and a predetermined running temperature (TS). The three inlet stages are electrically coupled to an outlet stage which includes a timer for producing a pulse of predetermined duration.

Abstract translation: 一种用于自动控制包括三个入口级的催化消声器的旁通电动阀的装置，所述第一入口级响应于发动机转速的速度或数量，所述第二入口级响应于所述节气门位置，并且包括减速 并且第三入口级响应于催化剂的温度，并且包括用于将催化剂的温度与最大允许温度（TMAX。）和预定运行温度（TS）进行比较的装置。 三个入口级电耦合到出口级，其包括用于产生预定持续时间的脉冲的计时器。