← Back to Patent Explorer
JPH06257546A Expired / Lapsed JP ⏱️ 0.0 years remaining

Ignition timing control device for internal combustion engine

Assignee: Nissan Motor Co Ltd
•
Filing: 1993-03-05
•
Granted: —
•
Expires: 2013-03-05
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Translated from Japanese (57)【要約】 【目的】排気浄化用触媒を、点火時期の遅角補正によっ て有効的に活性化させ、かつ、無駄な遅角補正を回避す る。 【構成】触媒の上流側と下流側とでそれぞれに排気温度 T1,T2を検出し(S1)、前記排気温度T1,T2 の温度差ΔTを演算する(S2)。そして、前記下流側 排気温度T2に基づいて基本遅角補正量Rを設定する (S3)。一方、前記下流側排気温度T2に基づいて触 媒が活性温度に達しているか否をか判別する。そして、 前記基本遅角補正量Rを補正設定するための補正率C R,CR’を、前記温度差ΔTに応じてそれぞれに異な る特性で設定する(S5,S7)。ここで、前記基本遅 角補正量Rを前記補正率CR,CR’で補正設定し(S 6,S8)、該補正結果に基づいて点火時期を遅角補正 する(S9)。 (57) [Abstract] [Purpose] To effectively activate an exhaust purification catalyst by retard correction of ignition timing, and avoid useless retard correction. [Structure] Exhaust temperatures T1 and T2 are detected respectively on the upstream side and the downstream side of a catalyst (S1), and the exhaust temperatures T1 and T2 are detected. The temperature difference ΔT is calculated (S2). Then, the basic retard correction amount R is set based on the downstream side exhaust temperature T2 (S3). On the other hand, it is determined whether or not the catalyst has reached the activation temperature based on the downstream side exhaust temperature T2. And A correction factor C for correcting and setting the basic retard correction amount R R and CR 'are set with different characteristics according to the temperature difference ΔT (S5, S7). Here, the basic retard correction amount R is corrected and set by the correction rates CR and CR ′ (S 6, S8), and the ignition timing is retarded based on the correction result (S9).

Inventors

  • 👤 Koji Ishihara
  • 👤 康二 石原

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-10-30 05:52
CPC Classifications
—

Claims Analysis

Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag