Engine speed detecting system for multiple-displacement engine,申请号US19840641384-传众专利搜索

Engine speed detecting system for multiple-displacement engine

申请公布号：US4522179(A)

申请号：US19840641384

申请日期：1984.08.16

申请公布日期：1985.06.11

申请人：

MAZDA MOTOR CORPORATION

发明人：NISHIMURA, HIROFUMI;ODA, HIROYUKI;KANEKO, TADASHI;TAKAI, AKIRA;TAKEUCHI, NOBUO

分类号：F02D41/02;F02D17/02;F02D35/00;F02D41/00;F02D41/16;F02D41/34;F02D41/36;F02D45/00;(IPC1-7):F02D17/00

主分类号：F02D41/02

摘要：A multiple-displacement engine is provided with a cylinder number control means and a cylinder-reduction determination means in order to switch the operating state of the engine from the full-displacement operation to the part displacement operation or from the latter to the former according to the operating condition of the engine. A period calculating means receives signals generated from a crank angle detecting means every predetermined crank angle and calculates the time interval corresponding to the predetermined crank angle. An engine speed calculating means calculates the engine rpm on the basis of the calculated time interval or period. A crank angle determination means which receives the output from the cylinder-reduction determination means and sets the predetermined crank angle to be submitted to the period calculating means to include a crank angle corresponding to the power stroke of a working cylinder in the part-displacement state of the engine.