overboostn.

Brit.

/ˈəʊvəbuːst/, U.S.

/ˈoʊvərˌbust/

Origin: Formed within English, by derivation. Etymons: over- prefix, boost n.²

Etymology: < over- prefix + boost n.²

Engineering.

1. A temporary boost provided to the power of the internal combustion engine of a vehicle, by allowing the supercharger to force more air into the engine for a short period of time; a function that provides this; (also) a measure of the boost achieved.

ΚΠ

1944 Independent Offices Appropriation Bill 1945: Hearings Subcomm. Comm. Appropriations (U.S. House of Representatives, 78th Congr. 2nd Sess.) 125 We know if we inject water into the cylinder, we can increase the power developed by the engine by an overboost of 15 to 20 precent.

1984 Financial Times (Nexis) 3 Nov. 15 Even without using the overboost, the Thema e.i. (for electronic injection) turbo I drove a few weeks ago was exceptionally fleet of foot and ultra-refined. On the autobahn, it held 125 mph in tranquillity.

2019 G. Chapman Mini xi. 143 The MINI Cooper S..now [has] engine power of 175 brake horsepower at 5,500 rpm and torque of 177 pounds-feet anywhere between 1,600 and 5,000 rpm, with an Overboost function briefly increasing that to 192 pounds-feet when called for.

2. Excessive pressure in an internal combustion engine during supercharging.

ΚΠ

1947 H. T. Sparrow in U.S. Patent 2,433,326 2 Fig. 1 is a diagrammatical showing of a complete engine, induction and exhaust system, the electronic control for the intake manifold pressure, and one form of my means for preventing overboost in the compressor discharge pressure.

1981 N.Y. Times (Nexis) 14 June vi. 10/5 Boost is about six pounds per square inch, and protection against ‘overboost’ is provided by an automatic fuel cutoff, should the machinery ever fail.

2020 J. Taylor Mercedes-Benz W201 (190) (e-book, accessed 14 Dec. 2021) The engine retained its standard 9.1:1 compression but there was an additional electronic control unit to alter the ignition timing and advance as needed, and to provide protection against over-boost and over-revving.

This is a new entry (OED Third Edition, December 2022).

单词	overboost
释义	overboostn. Brit. /ˈəʊvəbuːst/, U.S. /ˈoʊvərˌbust/ Origin: Formed within English, by derivation. Etymons: over- prefix, boost n.² Etymology: < over- prefix + boost n.² Engineering. 1. A temporary boost provided to the power of the internal combustion engine of a vehicle, by allowing the supercharger to force more air into the engine for a short period of time; a function that provides this; (also) a measure of the boost achieved. ΚΠ 1944 Independent Offices Appropriation Bill 1945: Hearings Subcomm. Comm. Appropriations (U.S. House of Representatives, 78th Congr. 2nd Sess.) 125 We know if we inject water into the cylinder, we can increase the power developed by the engine by an overboost of 15 to 20 precent. 1984 Financial Times (Nexis) 3 Nov. 15 Even without using the overboost, the Thema e.i. (for electronic injection) turbo I drove a few weeks ago was exceptionally fleet of foot and ultra-refined. On the autobahn, it held 125 mph in tranquillity. 2019 G. Chapman Mini xi. 143 The MINI Cooper S..now [has] engine power of 175 brake horsepower at 5,500 rpm and torque of 177 pounds-feet anywhere between 1,600 and 5,000 rpm, with an Overboost function briefly increasing that to 192 pounds-feet when called for. 2. Excessive pressure in an internal combustion engine during supercharging. ΚΠ 1947 H. T. Sparrow in U.S. Patent 2,433,326 2 Fig. 1 is a diagrammatical showing of a complete engine, induction and exhaust system, the electronic control for the intake manifold pressure, and one form of my means for preventing overboost in the compressor discharge pressure. 1981 N.Y. Times (Nexis) 14 June vi. 10/5 Boost is about six pounds per square inch, and protection against ‘overboost’ is provided by an automatic fuel cutoff, should the machinery ever fail. 2020 J. Taylor Mercedes-Benz W201 (190) (e-book, accessed 14 Dec. 2021) The engine retained its standard 9.1:1 compression but there was an additional electronic control unit to alter the ignition timing and advance as needed, and to provide protection against over-boost and over-revving. This is a new entry (OED Third Edition, December 2022). < n.1944
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