Idle revolution speed control apparatus for an internal combustion engine

• US 5,054,446 A
• Filed: 01/31/1991
• Issued: 10/08/1991
• Est. Priority Date: 02/13/1990
• Status: Expired due to Term

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Ohuchi, Hirofumi
• Primary Examiner(s): WOLFE JR, WILLIS RAY
• Application Number:
  US07/648,764
• Time in Patent Office: 250 Days
• Field of Search: 123/339, 123/585, 290/40 R, 290/40 A, 290/40 B, 290/40 C, 290/40 F
• US Class Current: 123/339.18
• CPC Class Codes: B60W 2710/065 Idle condition
• CPC Class Codes: B60W 30/18027 Drive off, accelerating from standstill
• CPC Class Codes: F02D 41/083 taking into account engine load variation, e.g. air-conditionning

Abstract

An idle revolution speed control apparatus for an internal combustion engine comprises a detecting means to detect an electric quantity produced at an electricity generating unit consisting of a generator and a generator control device, an electricity variation quantity calculating means to calculate a variation quantity with respect to the electric quantity obtained by the detecting means, a correction quantity calculating means to calculate an idle revolution speed correction quantity on the basis of data obtained by the detecting means and the electricity variation quantity calculating means, and an adding means for adding the correction quantity obtained by the correction quantity calculating means.

Claims

1. An idle revolution speed control apparatus for an internal combustion engine wherein an idle revolution speed is corrected in response to the operational condition of the engine which comprises:

a detecting means to detect an electric quantity produced at an electricity generating unit consisting of a generator and a generator control device,

an electricity variation quantity calculating means to calculate a variation quantity with respect to the electric quantity obtained by the detecting means,

a correction quantity calculating means to calculate an idle revolution speed correction quantity on the basis of data obtained by the detecting means and the electricity variation quantity calculating means, and an adding means for adding the correction quantity obtained by the correction quantity calculating means.

2. The idle revolution speed control apparatus according to claim 1, wherein the electricity variation quantity calculating means calculates a variation quantity on the basis of the error between a voltage of a battery at the present time and a voltage of the battery at a predetermined time past.

3. The idle revolution speed control apparatus according to claim 2, wherein the variation quantity obtained from the battery voltage is added to the correction quantity determined on the basis of a load to thereby obtain a control quantity.