公开(公告)号：JP2012172608A

公开(公告)日：2012-09-10

申请号：JP2011036097

申请日：2011-02-22

Applicant: Toyota Motor Corp ,  トヨタ自動車株式会社

Inventor： IWAOKA ATSUSHI ,  SUZUKI TAKASHI ,  SASAKI TOSHITAKE ,  ANDO IKUO

IPC: F01P7/16

Abstract: PROBLEM TO BE SOLVED: To provide a water-cooled engine control device capable of properly executing various controls based on the temperature of cooling water in accordance with changes in a discharge amount of a water pump.SOLUTION: The device includes a water pump that can vary a discharge amount. When the water pump is in an operation stop mode, the control device executes various controls based on an estimated water temperature VT (solid line) estimated by a first estimation mode (t1 to t2). When the water pump is in a suppressed operation mode or a full operation mode, the control device executes various controls based on a cooling water temperature RT (dashed-dotted line) estimated by a second estimation mode (t3 and thereafter). When the estimation mode for a cooling water temperature is switched from a first operation state to a second operation state, the control device calculates a gradually varying temperature Svt (dashed-two dotted line), which gradually decreases with lapse of time setting the estimated water temperature VT estimated by the first estimation mode as an initial value just prior to switching, for a predetermined period (time t2 to t3) immediately after switching, and executes various controls based on the gradually varying temperature Svt.

Abstract translation: 要解决的问题：提供一种水冷发动机控制装置，其能够根据水泵的排出量的变化，根据冷却水的温度适当地执行各种控制。

解决方案：该装置包括可以改变排出量的水泵。 当水泵处于运行停止模式时，控制装置基于通过第一估计模式（t1至t2）估计的估计水温VT（实线）执行各种控制。 当水泵处于抑制操作模式或全操作模式时，控制装置基于由第二估计模式（t3及其后）估计的冷却水温度RT（虚线）进行各种控制。 当冷却水温度的估计模式从第一操作状态切换到第二操作状态时，控制装置计算随着时间的推移而逐渐减小的逐渐变化的温度Svt（虚线二点） 在第一估计模式下估计的温度VT作为切换之前的初始值，在切换之后的预定时间段（时间t2至t3），并且基于逐渐变化的温度Svt执行各种控制。 版权所有（C）2012，JPO＆INPIT