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JPH0771213A Expired / Lapsed JP ⏱️ 0.0 years remaining

Variable valve device

Assignee: Toyota Motor Corp
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Filing: 1993-12-06
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Granted: —
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Expires: 2013-12-06
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Abstract

Abstract Translated from Japanese (57)【要約】 【目的】カムのバルブリフタに対する作用幅を大きくと り、バルブの最大リフト速度を増大させる。 【構成】バルブとカムシャフト2との間にバルブリフタ 8を配置する。バルブリフタ9に対応して、カムシャフ ト2上にプロフィールの異なる二つの低速カム16と一 つの高速カム17を設ける。バルブリフタ8の底部ほぼ 全域に、各カム16,17と当接可能に、一組のシム1 5をなす二つの低速シム片18と一つの高速シム片19 を配設する。又、高速シム片19を高速カム17に対し て作用及び非作用となる方向へ移動可能に設ける。そし て、高速シム片19を、カムシャフト2に対してほぼ直 角をなす方向へ、他の低速シム片18に対して分割す る。これにより、高速シム片19がバルブリフタ8の底 部ほぼ全域にわたって分割され、高速カム17のバルブ リフタ8に対する作用幅が最大限に確保される。 (57) [Summary] [Purpose] To increase the working width of the cam on the valve lifter and increase the maximum lift speed of the valve. [Structure] A valve lifter 8 is arranged between a valve and a camshaft 2. Corresponding to the valve lifter 9, two low speed cams 16 and one high speed cam 17 having different profiles are provided on the camshaft 2. A set of shims 1 is provided on almost the entire bottom of the valve lifter 8 so that the cams 16 and 17 can come into contact with each other. Five low speed shim pieces 18 and one high speed shim piece 19 To arrange. Further, the high-speed shim piece 19 is provided so as to be movable in a direction in which it acts and does not act on the high-speed cam 17. Then, the high speed shim piece 19 is divided with respect to the other low speed shim pieces 18 in a direction substantially perpendicular to the camshaft 2. As a result, the high-speed shim piece 19 is divided over almost the entire bottom portion of the valve lifter 8, and the width of action of the high-speed cam 17 on the valve lifter 8 is maximized.

Inventors

  • 👤 Hiroshi Tada
  • 👤 博 多田

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-08 06:41
CPC Classifications
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