| 摘要 |
PCT No. PCT/DE90/00231 Sec. 371 Date Nov. 4, 1991 Sec. 102(e) Date Nov. 4, 1991 PCT Filed Mar. 23, 1990 PCT Pub. No. WO90/13738 PCT Pub. Date Nov. 15, 1990.A method is introduced of checking the drivability of a tank-venting valve (TEV) and of an idle actuator. After actuating the TEV, an additional air/fuel mixture is supplied to the intake region of an internal combustion engine having an air/fuel ratio which can be equal to that at which the engine usually operates ( lambda 0) or greater or less than lambda 0. Reactions of a lambda -control and/or of an idle control can be evaluated in dependence thereon. It is advantageous that a check is made independently of how intense the additional air/fuel mixture is enriched with fuel. |
