行った際の：whenを避ける

複数の異なる温度条件で測定を行った際の排気量データに基づいて、最適排気量を算出する。

ChatGPT:

 

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Here are precise, claim-friendly variants. Pick the noun that matches your context for 排気量:

Generic / apparatus exhaust:

1. Based on exhaust-volume data obtained by performing measurements under a plurality of different temperature conditions, an optimal exhaust volume is calculated.

Vacuum / process gas:
2) Based on exhaust-gas volume data measured under multiple, mutually different temperature conditions, an optimal exhaust-gas volume is calculated.

If the parameter is actually a rate (流量に近い用法):
3) Based on exhaust-flow(-rate) data measured under a plurality of different temperature conditions, an optimal exhaust flow rate is calculated.

If (rare) you truly mean engine displacement:
4) Based on displacement data measured under multiple different temperature conditions, an optimal displacement is calculated.
(Unusual in engine contexts—use only if your spec really treats displacement as a variable to be selected.)

Notes:

• 「複数の異なる」→ a plurality of different / multiple, mutually different.

• 「算出する」→ calculate/compute; either is fine.

• If you later normalize volumes (e.g., to STP), you can append: “…(optionally corrected to standard conditions).”

あなた:

How about "when measurements were performed under multiple different temperature conditions"?

ChatGPT:

 

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Short answer: Grammatical, but not ideal for patent style.

• “when measurements were performed …” sounds past-tense and event-specific. Claims/specs usually state timeless facts or conditions, so prefer present/passive formulations.

Better phrasings:

• “Based on exhaust-volume data measured under a plurality of different temperature conditions, an optimal exhaust volume is calculated.”

• “Based on data obtained from measurements performed under a plurality of different temperature conditions, …”

• (if you insist on “when”) “Based on data obtained when measurements are performed under a plurality of different temperature conditions, …” ← acceptable, but wordier than needed.

Tiny wording tip: “multiple different” is a bit redundant. Use “a plurality of different …” (patent-y) or just “multiple …” / “several …” if you don’t need to stress distinctness.