摘要:
A fuel control system that includes a fuel injector control module that selectively applies a power source to a coil of a fuel injector. The fuel control system also includes a current determination module that selectively measures current flowing through the coil. The fuel control system also includes a fuel temperature estimation module that selectively calculates a resistance of the coil based on the measured current and a voltage value of the power source and that determines an estimated fuel temperature based on the resistance. The fuel injector control module controls operation of a fuel system based on the estimated fuel temperature.
摘要:
An engine control system comprises an intake valve deactivation module and an exhaust valve deactivation module. The intake valve deactivation module deactivates an intake valve of a cylinder of an engine based on an engine stop request such that the intake valve remains closed. The exhaust valve deactivation module deactivates an exhaust valve of the cylinder after the intake valve deactivation module deactivates the intake valve such that the exhaust valve remains closed.
摘要:
A method and a system for reducing belt noise in an engine, wherein the belt is engaged with an alternator includes a transmission upshift detection module determining a transmission upshift or a quickly closing throttle detection module determining a quickly closing throttle. The control module further includes an engine speed prediction module determining a predicted engine speed in response to determining a transmission upshift and an engine deceleration prediction module determining a predicted engine deceleration when the predicted deceleration of the engine crankshaft is greater than a threshold. An alternator control module controls a rotor current in the alternator to add load to the alternator rotor to reduce potential belt noise.
摘要:
The disclosure relates to a method for receiving in-vehicle information regarding diesel fuel cloud point condition. The method includes establishing communication between a telematics unit in a vehicle and i) a global positioning system device, ii) a call center including a database, and iii) a cloud point monitoring device in the vehicle. The telematics unit receives from at least one of i, ii, or iii, information pertaining to vehicle location, cloud point, and ambient temperature. The telematics unit determines from the information whether fuel in a fuel system of the vehicle is reaching cloud point or can reach cloud point within a given time period. The telematics unit then transmits an in-vehicle alert when the fuel in the vehicle fuel system is reaching cloud point or can reach cloud point within a given time period. The disclosure also relates to a system for performing the method.
摘要:
An engine oil viscosity measurement system is provided. The system includes: a solenoid response module that determines an actual response time based on a position signal; an expected response module that determines an expected response time based on a system voltage and engine oil temperature; and a diagnostic module that diagnoses viscosity of the engine oil based on the actual response time and the expected response time.
摘要:
An engine control system for controlling engine operation in activated and deactivated modes in a displacement on demand (DOD) engine includes an impulse charging device that is disposed upstream of an intake port of a cylinder of the DOD engine and that is operable to regulate air flow into the cylinder. A first module initiates impulse charging to regulate air flow into the cylinder when a desired engine torque output nears a first threshold engine torque output during engine operation in the deactivated mode.
摘要:
A response time compensation system for controlling engine operation in activated and deactivated modes in a displacement on demand engine includes a LOMA system that regulates pressurized fluid flow to switch engine operation between the activated and the deactivated modes and a count module that monitors a cycle count of the LOMA system. A response factor module determines a response factor of the LOMA system based on the cycle count and a compensation module generates a compensated response time of the LOMA system based on the response factor.
摘要:
A system for a vehicle includes a trigger module, a fuel control module, and a cylinder control module. The trigger module generates a trigger when an engine speed is greater than a first predetermined speed. The first predetermined speed is greater than zero. The fuel control module cuts off fuel to cylinders of the engine in response to the generation of the trigger. The cylinder control module selectively disables opening of intake and exhaust valves of the cylinders in response to the generation of the trigger after the fuel is cut off.
摘要:
A system includes a user interface module, a level determination module, and a level storage module. The user interface module outputs an oil level request based on user input. The level determination module determines N oil levels of an engine. N is an integer greater than one. The level storage module stores the N oil levels and outputs one of the N oil levels in response to the oil level request.
摘要:
A crankshaft reversal detection system includes a sensor module and a control module that communicates with the sensor module. The sensor module detects position of a belt tensioner that communicates with a crankshaft driven accessory drive belt. The control module determines a rotational direction of the crankshaft pulley based on the position of the belt tensioner.