Vehicle control device

The vehicle control device in hybrid vehicles with exhaust turbo devices adjusts engine torque and uses motor assist to maintain excess air ratio, addressing delayed supercharging issues and preserving fuel efficiency and performance.

JP7757747B2Active Publication Date: 2025-10-22MAZDA MOTOR CORP
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Patent Information

Application Number
JP2021197807
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2021-12-06
Publication Date
2025-10-22
Estimated Expiration
2041-12-06

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Patent Text Reader

Abstract

To curb degradation of fuel economy performance while curbing degradation of traveling performance associated with a delay in supercharging response in a hybrid vehicle comprising a motor and an engine having an exhaust turbo device.SOLUTION: A processor 80 is configured to: calculate an oxygen amount in a combustion chamber C; calculate a fuel injection amount limit value on the basis of the oxygen amount and a lower limit λ; calculate λ upper limit torque T2 which is torque when fuel of the fuel injection amount limit value is injected into the combustion chamber C; calculate demand torque T1 on the basis of an accelerator opening; set engine upper limit torque T3 which is lower than the λ upper limit torque T2 by excess torque Td; calculate motor assist torque T4 on the basis of a difference between the demand torque T1 and the engine upper limit torque T3; control torque of an engine 1 on the basis of the engine upper limit torque T3; and control torque of a motor 21 on the basis of the motor assist torque T4.SELECTED DRAWING: Figure 6
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Citation Information

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