{"product_id":"40055-high-pressure-common-rail-computer-board-fuel-injector-chip","title":"40055 – High Pressure Common Rail Computer Board Fuel Injector Chip (Vulnerable \/ Wear Part)","description":"\u003cp\u003e40055 is a dedicated fuel injector driver chip designed for high pressure common rail diesel engine computer boards.\u003c\/p\u003e\n\u003cp\u003eIt is commonly replaced as a vulnerable or wear part in ECU repairs, especially when injector channels fail due to electrical or thermal stress.\u003c\/p\u003e\n\u003cp\u003eThis chip controls the high‑speed opening and closing of piezoelectric or solenoid injectors in common rail systems, ensuring precise fuel metering at pressures up to 2000 bar.\u003c\/p\u003e\n\u003cp\u003eIt provides peak‑and‑hold current regulation, which reduces injector heat generation and improves long‑term reliability.\u003c\/p\u003e\n\u003cp\u003e40055 operates with a supply voltage range of 4.5V to 36V, making it compatible with 12V and 24V commercial vehicle electrical systems.\u003c\/p\u003e\n\u003cp\u003eThe device integrates overcurrent protection, short‑circuit detection, and thermal shutdown to safeguard both the chip and the external injectors.\u003c\/p\u003e\n\u003cp\u003eIt supports up to 6 independent injector channels in sequential firing order, ideal for 4‑cylinder, 6‑cylinder, and even 8‑cylinder common rail diesel engines.\u003c\/p\u003e\n\u003cp\u003eFast response time (typical \u0026lt;2µs) enables precise injection timing for better fuel economy, lower emissions, and smoother engine operation.\u003c\/p\u003e\n\u003cp\u003eThis chip is qualified for automotive use with operating temperatures from -40°C to +150°C, suitable for under‑hood installation.\u003c\/p\u003e\n\u003cp\u003e40055 is often used as a direct replacement on common rail ECU boards from heavy‑duty trucks, agricultural machinery, construction equipment, and diesel passenger cars.\u003c\/p\u003e\n\u003cp\u003eEach unit is tested for open load, ground loss, and output clamping before shipment to ensure drop‑in compatibility.\u003c\/p\u003e","brand":"Qlnova","offers":[{"title":"Default Title","offer_id":45218245148781,"sku":null,"price":8.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/5950\/8845\/files\/1_03ee4dda-7ef8-4f81-903b-aa346045b1bd.webp?v=1779346918","url":"https:\/\/qlnova.com\/products\/40055-high-pressure-common-rail-computer-board-fuel-injector-chip","provider":"Qlnova","version":"1.0","type":"link"}